Drill bit wear type detection method and device

Abstract

The present invention provides a drill bit wear type detection method and device, which relates to the field of drilling monitoring technology. The method comprises: obtaining corresponding state change rate parameters according to working state parameters of preset data sampling points of the target drill bit; forming detection input parameters according to engineering parameters of the data sampling points of the target drill bit, the working state parameters and the state change rate parameters; obtaining the wear type of the target drill bit according to the detection input parameters and a preset trained decision tree model. The present invention can improve the accuracy and speed of drill bit wear type detection, and reduce the cost of drill bit wear type detection, thereby improving the efficiency of drill bit wear type detection, and further improving the efficiency of the overall drilling operation.

Description

Technical Field

[0001] The invention relates to the technical field of drilling monitoring, and in particular to a method and device for detecting drill bit wear types. Background Art

[0002] The exploration and development of oil and gas often involves the implementation of drilling operations, and the drill bit will wear out during the drilling process. If the drill bit is severely worn and continues to work, on the one hand, the drilling speed will slow down, and on the other hand, the drill bit will be damaged and difficult to repair. Therefore, in order to carry out the drilling operation normally, it is necessary to detect the type of drill bit wear so that the drill can be started in time when the drill bit is severely worn.

[0003] In the prior art, the detection of drill bit wear type mainly involves manually analyzing the relevant parameters of the drill bit to subjectively detect the drill bit wear type, and the relevant parameters based on the analysis are often only the engineering parameters of the drill bit (including but not limited to drilling pressure, torque, rotation speed and vibration amplitude, etc.) or only the working state parameters of the drill bit (which can also be understood as drill bit drilling effect index parameters, including but not limited to mechanical specific energy (MSE), cutting depth (DOC, Depth of Cut) and drill bit friction coefficient (Frictional factor), etc.). Since the above method relies on the work experience and work ability of the staff, and the range of drill bit parameters based on it is small, the accuracy of drill bit wear type detection is low, which can easily lead to misjudgment of the type of wear and lead to early drilling, increase the number of unnecessary drilling trips, or lead to the drill bit being considered not to have reached the degree of severe wear when it has been severely worn and is not suitable for continuing to work, resulting in damage to the drill bit, which will cause adverse effects on the overall drilling operation. In addition, manual analysis takes a long time, which will slow down the speed of drill bit wear type detection and delay the progress of the overall drilling operation. In addition, the above method is likely to require a lot of field investigation and downhole short section measurement work, which not only further increases the time consumption of the overall detection, but also makes the detection cost higher, making the cost of the overall drilling operation easily exceed the budget. It can be seen that the detection efficiency of the above method is relatively low, which will adversely affect the efficiency of the overall drilling operation.

[0004] In summary, the prior art has the problems of low accuracy and slow speed in detecting drill bit wear types, high cost in detecting drill bit wear types, and low efficiency in detecting drill bit wear types, which is not conducive to improving the efficiency of the overall drilling operation. Summary of the invention

[0005] One object of the present invention is to provide a drill bit wear type detection method to solve the problem that the drill bit wear type detection in the prior art has low accuracy and slow speed, and the drill bit wear type detection has high cost, which makes the drill bit wear type detection efficiency low, and is not conducive to improving the efficiency of the overall drilling operation. Another object of the present invention is to provide a drill bit wear type detection device. Another object of the present invention is to provide a computer device. Another object of the present invention is to provide a readable medium.

[0006] In order to achieve the above objectives, one aspect of the present invention discloses a method for detecting drill bit wear type, the method comprising:

[0007] According to the working state parameters of the preset data sampling points of the target drill bit, the corresponding state change rate parameters are obtained;

[0008] Forming detection input parameters according to the engineering parameters of the data sampling points of the target drill bit, the working state parameters and the state change rate parameters;

[0009] The wear type of the target drill bit is obtained according to the detection input parameters and the preset trained decision tree model.

[0010] Optionally, further including:

[0011] Before obtaining the corresponding state change rate parameter according to the working state parameter of the preset data sampling point of the target drill bit,

[0012] According to the engineering parameters of the preset data sampling points of the target drill bit, the corresponding working state parameters are obtained, wherein the engineering parameters include the ground drilling pressure, ground torque, mechanical drilling speed, drill bit diameter and drill bit speed of the target drill bit, and the power drill speed displacement ratio of the power drill, the drilling fluid displacement flowing through the power drill, the maximum output torque of the power drill, the maximum pressure drop of the power drill and the actual drilling pressure drop of the power drill; the working state parameters include the drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth and drill bit wear coefficient of the target drill bit.

[0013] Optionally, obtaining corresponding working state parameters according to the engineering parameters of the preset data sampling points of the target drill bit includes:

[0014] Determining whether the target drill bit is matched with a powered drill tool;

[0015] If not, the drill bit mechanical specific energy is obtained according to the surface drilling pressure, surface torque, mechanical drilling speed, drill bit diameter and drill bit speed; the drill bit friction coefficient is obtained according to the surface torque, surface drilling pressure and drill bit diameter; the drill bit cutting depth is obtained according to the mechanical drilling speed and drill bit speed; the drill bit wear coefficient is obtained according to the surface drilling pressure and drill bit cutting depth;

[0016] If so, the mechanical specific energy of the drill bit is obtained according to the surface drilling pressure, surface torque, mechanical drilling speed, drill bit diameter, drill bit speed, power drill speed displacement ratio, drilling fluid displacement flowing through the power drill, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill; the drill bit friction coefficient is obtained according to the surface torque, surface drilling pressure, drill bit diameter, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill; the drill bit cutting depth is obtained according to the mechanical drilling speed, drill bit speed, power drill speed displacement ratio and drilling fluid displacement flowing through the power drill; the drill bit wear coefficient is obtained according to the surface drilling pressure and drill bit cutting depth.

[0017] Optionally, obtaining corresponding state change rate parameters according to the working state parameters of the preset data sampling points of the target drill bit includes:

[0018] Determine the last data sampling point as the corresponding first target sampling point, and determine the last data sampling point among the other data sampling points except the first target sampling point as the corresponding second target sampling point;

[0019] The state change rate parameter is obtained according to the first working state parameter corresponding to the first target sampling point and the second working state parameter corresponding to the second target sampling point, wherein the state change rate parameter includes the mechanical specific energy change rate, the friction coefficient change rate, the cutting depth change rate and the wear coefficient change rate.

[0020] Optionally, obtaining the state change rate parameter according to a first working state parameter corresponding to the first target sampling point and a second working state parameter corresponding to the second target sampling point includes:

[0021] Obtaining the mechanical specific energy change rate according to a first drill bit mechanical specific energy corresponding to the first working state parameter and a second drill bit mechanical specific energy corresponding to the second working state parameter;

[0022] Obtaining the friction coefficient change rate according to a first drill bit friction coefficient corresponding to the first working state parameter and a second drill bit friction coefficient corresponding to the second working state parameter;

[0023] Obtaining the cutting depth change rate according to a first drill bit cutting depth corresponding to the first working state parameter and a second drill bit cutting depth corresponding to the second working state parameter;

[0024] The wear coefficient change rate is obtained according to the first drill bit wear coefficient corresponding to the first working state parameter and the second drill bit wear coefficient corresponding to the second working state parameter.

[0025] Optionally, further including:

[0026] Before obtaining the corresponding working state parameters according to the engineering parameters of the preset data sampling points of the target drill bit,

[0027] The actual drilling pressure drop of the power drilling tool is obtained by subtracting the second riser pressure when the target drill bit is lifted from the corresponding bottom of the well to a preset drilling depth from the first riser pressure when the target drill bit is drilling normally.

[0028] Optionally, forming the detection input parameters according to the engineering parameters of the data sampling points of the target drill bit, the working state parameters and the state change rate parameters includes:

[0029] The detection input parameters are formed according to the drilling footage, pure drilling time, footage time, mechanical drilling speed, drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth, drill bit wear coefficient, mechanical specific energy change rate, friction coefficient change rate, cutting depth change rate and wear coefficient change rate of the target drill bit, wherein the engineering parameters include the drilling footage, pure drilling time, footage time and mechanical drilling speed of the target drill bit, the working state parameters include the drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth and drill bit wear coefficient of the target drill bit, and the state change rate parameters include the mechanical specific energy change rate, friction coefficient change rate, cutting depth change rate and wear coefficient change rate of the target drill bit.

[0030] Optionally, further including:

[0031] Before obtaining the wear type of the target drill bit according to the detection input parameters and the preset trained decision tree model,

[0032] According to the historical working state parameters of the preset historical sampling points of the plurality of historical drill bits, the historical state change rate parameters of the corresponding historical drill bits are obtained;

[0033] Forming an input sample according to the historical engineering parameters corresponding to the historical sampling points of the historical drill bit, the historical working state parameters and the historical state change rate parameters;

[0034] Taking the historical wear type corresponding to the historical drill bit as the corresponding output sample, and forming a corresponding sample to be selected according to the input sample corresponding to the historical drill bit and the corresponding output sample;

[0035] According to a preset sample ratio, a corresponding plurality of training samples and a plurality of test samples are determined from a plurality of samples to be selected, and a preset untrained decision tree model is trained using the plurality of training samples and test samples to obtain a trained decision tree model.

[0036] Optionally, further including:

[0037] Before obtaining the historical state change rate parameters of the corresponding historical drill bits according to the historical working state parameters of the preset historical sampling points of the plurality of historical drill bits,

[0038] According to the historical engineering parameters of preset historical sampling points of multiple historical drill bits, corresponding historical working status parameters are obtained, wherein the historical engineering parameters include the historical ground drilling pressure, historical ground torque, historical mechanical drilling speed, historical drill bit diameter and historical drill bit speed of the historical drill bit, as well as the historical power drill speed displacement ratio of the power drill, the historical drilling fluid displacement flowing through the power drill, the historical maximum output torque of the power drill, the historical maximum pressure drop of the power drill and the historical actual drilling pressure drop of the power drill, and the historical working status parameters include the historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth and historical drill bit wear coefficient of the historical drill bit.

[0039] Optionally, obtaining corresponding historical working state parameters according to historical engineering parameters of preset historical sampling points of multiple historical drill bits includes:

[0040] Determining whether the historical drill bit is matched with a powered drill tool;

[0041] If not, the historical drill bit mechanical specific energy is obtained according to the historical ground drilling pressure, historical ground torque, historical mechanical drilling speed, historical drill bit diameter and historical drill bit speed; the historical drill bit friction coefficient is obtained according to the historical ground torque, historical ground drilling pressure and historical drill bit diameter; the historical drill bit cutting depth is obtained according to the historical mechanical drilling speed and historical drill bit speed; the historical drill bit wear coefficient is obtained according to the historical ground drilling pressure and historical drill bit cutting depth;

[0042] If so, the historical drill bit mechanical specific energy is obtained based on the historical surface drilling pressure, historical surface torque, historical mechanical drilling speed, historical drill bit diameter, historical drill bit speed, historical power drill speed displacement ratio, historical drilling fluid displacement through the power drill, historical power drill maximum output torque, historical power drill maximum pressure drop and historical power drill actual drilling pressure drop; the historical drill bit friction coefficient is obtained based on the historical surface torque, historical surface drilling pressure, historical drill bit diameter, historical power drill maximum output torque, historical power drill maximum pressure drop and historical power drill actual drilling pressure drop; the historical drill bit cutting depth is obtained based on the historical mechanical drilling speed, historical drill bit speed, historical power drill speed displacement ratio and historical drilling fluid displacement through the power drill; the historical drill bit wear coefficient is obtained based on the historical surface drilling pressure and historical drill bit cutting depth.

[0043] Optionally, obtaining the historical state change rate parameter of the corresponding historical drill bit according to the historical working state parameters of the preset historical sampling points of the plurality of historical drill bits includes:

[0044] Determine the last historical sampling point as the corresponding third target sampling point, and determine the last historical sampling point among the other historical sampling points except the third target sampling point as the corresponding fourth target sampling point;

[0045] The historical state change rate parameter is obtained according to the first historical working state parameter corresponding to the third target sampling point and the second historical working state parameter corresponding to the fourth target sampling point, wherein the historical state change rate parameter includes the historical mechanical specific energy change rate, the historical friction coefficient change rate, the historical cutting depth change rate and the historical wear coefficient change rate.

[0046] Optionally, forming the input sample according to the historical engineering parameters corresponding to the historical sampling points of the historical drill bit, the historical working state parameters and the historical state change rate parameters includes:

[0047] The input sample corresponding to the historical drill bit is formed according to the historical drilling footage, historical pure drilling time, historical footage time, historical mechanical drilling speed, historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth, historical drill bit wear coefficient, historical mechanical specific energy change rate, historical friction coefficient change rate, historical cutting depth change rate and historical wear coefficient change rate of the historical drill bit, wherein the historical engineering parameters include the historical drilling footage, historical pure drilling time, historical footage time and historical mechanical drilling speed of the historical drill bit, the historical working state parameters include the historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth and historical drill bit wear coefficient of the historical drill bit, and the historical state change rate parameters include the historical mechanical specific energy change rate, historical friction coefficient change rate, historical cutting depth change rate and historical wear coefficient change rate of the historical drill bit.

[0048] Optionally, further including:

[0049] Before using the historical wear type corresponding to the historical drill bit as the corresponding output sample,

[0050] According to a preset drill bit wear classification standard, determining the starting drilling reasons of the plurality of historical drill bits, and determining the historical drill bit corresponding to the starting drilling reason associated with the drill bit wear condition as the selected drill bit;

[0051] Determining wear status levels corresponding to the plurality of selected drill bits according to the drill bit wear grading standard;

[0052] Based on the wear status levels of the plurality of selected drill bits, historical wear types corresponding to the plurality of historical drill bits are determined, wherein the historical wear types are significant wear or insignificant wear.

[0053] Optionally, the determining, based on the wear state levels of the plurality of selected drill bits, the historical wear types corresponding to the plurality of historical drill bits comprises:

[0054] Based on the wear state levels of the plurality of selected drill bits, determining the number of selected drill bits having a wear state level higher than or equal to each standard state level preset in the drill bit wear grading standard;

[0055] According to the number of selected drill bits corresponding to each standard status level and the total number of all selected drill bits, the proportion of the number of drill bits corresponding to each standard status level is obtained;

[0056] Determine the highest standard state level among the standard state levels in which the number of drill bits accounts for a proportion greater than or equal to a preset proportion threshold as a critical wear amount level;

[0057] Determining, according to the drill bit wear grading standard, wear status grades corresponding to other historical drill bits among the historical drill bits except the selected drill bit;

[0058] The historical wear type of the historical drill bit having a wear state level higher than or equal to the critical wear amount level is determined as significantly worn, and the historical wear type of the historical drill bit having a wear state level lower than the critical wear amount level is determined as not significantly worn.

[0059] In order to achieve the above objectives, another aspect of the present invention discloses a drill bit wear type detection device, the device comprising:

[0060] A change rate determination module, used to obtain corresponding state change rate parameters according to the working state parameters of the preset data sampling points of the target drill bit;

[0061] An input determination module, used to form a detection input parameter according to the engineering parameter of the data sampling point of the target drill bit, the working state parameter and the state change rate parameter;

[0062] The type detection module is used to obtain the wear type of the target drill bit according to the detection input parameters and a preset trained decision tree model.

[0063] The present invention also discloses a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the method described above is implemented when the processor executes the program.

[0064] The present invention also discloses a computer-readable medium on which a computer program is stored. When the program is executed by a processor, the method described above is implemented.

[0065] The drill bit wear type detection method and device provided by the present invention obtain corresponding state change rate parameters according to the working state parameters of the preset data sampling points of the target drill bit, and can obtain state change rate parameters that fully characterize and conform to the change of the working state of the drill bit based on the working state parameters collected at the data sampling points of the actual drilling operation and characterizing the actual working state (drilling effect) of the target drill bit, so that the obtained state change rate parameters have high accuracy, which is conducive to improving the accuracy of the overall detection process; by forming detection input parameters according to the engineering parameters of the data sampling points of the target drill bit, the working state parameters and the state change rate parameters, it is possible to comprehensively characterize the engineering parameters characterizing the mechanical properties and engineering properties of the target drill bit, the working state parameters characterizing the actual working state (drilling effect) of the target drill bit, and the working state parameters characterizing the drill bit working state of the target drill bit. The state change rate parameter of the state change situation forms the input information of the detection, which fully considers the law that the actual wear degree of the drill bit is closely related to the mechanical properties of the drill bit, the overall engineering properties, the actual working state of the drill bit and the change of the working state of the drill bit, so that the content of the input information used for detection is relatively comprehensive and closely corresponds to the wear condition of the drill bit, and the parameter range included is relatively wide, which is conducive to improving the accuracy of the overall detection process; by obtaining the wear type of the target drill bit according to the detection input parameters and the preset trained decision tree model, the decision tree model can be suitable for type detection and has the advantages of fast calculation and processing speed, so as to realize automatic detection based on the detection input parameters, quickly and accurately obtain the wear type of the target drill bit, greatly reduce the dependence on manual work, thereby greatly improving the speed and accuracy of the overall drill bit wear type detection. In addition, the drill bit wear type detection method and device provided by the present invention are based on input parameters that facilitate downhole measurement and preliminary analysis through sensors, computers and other equipment, and the overall analysis and calculation have a high degree of automation, and the information involved can also be quickly transmitted through the network and other means. Therefore, it also greatly reduces the reliance on field investigations and downhole short section measurement work, thereby significantly reducing the cost of overall drill bit wear type detection, and further improving the speed of overall drill bit wear type detection. Therefore, the drill bit wear type detection method and device provided by the present invention significantly improve the efficiency of drill bit wear type detection, which is conducive to the smooth, accurate and safe conduct of the overall drilling operation, and reduces the cost of the overall drilling operation. In summary, the drill bit wear type detection method and device provided by the present invention can improve the accuracy and speed of drill bit wear type detection, and reduce the cost of drill bit wear type detection, thereby improving the efficiency of drill bit wear type detection, and then improving the efficiency of the overall drilling operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0067] Figure 1 A schematic flow chart of a drill bit wear type detection method according to an embodiment of the present invention is shown;

[0068] Figure 2 A schematic diagram of an optional step of obtaining a state change rate parameter according to an embodiment of the present invention is shown;

[0069] Figure 3 A schematic diagram showing an optional step of obtaining a historical state change rate parameter according to an embodiment of the present invention is shown;

[0070] Figure 4 A schematic diagram showing an optional step of determining the historical wear type of a historical drill bit according to an embodiment of the present invention;

[0071] Figure 5 A schematic diagram showing a further step of determining the historical wear type of a historical drill bit according to an embodiment of the present invention is shown;

[0072] Figure 6 A schematic diagram of a module of a drill wear type detection device according to an embodiment of the present invention is shown;

[0073] Figure 7 A schematic diagram showing the structure of a computer device suitable for implementing an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0074] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0075] The terms “first”, “second”, etc. used in this document do not particularly refer to an order or sequence, nor are they used to limit the present invention. They are only used to distinguish elements or operations described with the same technical terms.

[0076] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0077] As used herein, "and / or" includes any or all combinations of the items described.

[0078] It should be noted that the acquisition, storage, use, and processing of data in the technical solution of the present invention are in compliance with the relevant provisions of national laws and regulations.

[0079] It should be noted that the drill bit wear type detection method and device disclosed in the present application can be used in the field of drilling monitoring technology, and can also be used in any field except the field of drilling monitoring technology. The application field of the drill bit wear type detection method and device disclosed in the present application is not limited.

[0080] The embodiment of the present invention discloses a method for detecting drill bit wear type, such as Figure 1 As shown, the method specifically comprises the following steps:

[0081] S101: Obtain corresponding state change rate parameters according to the working state parameters of the preset data sampling points of the target drill bit.

[0082] S102: forming detection input parameters according to the engineering parameters of the data sampling points of the target drill bit, the working state parameters and the state change rate parameters.

[0083] S103: Obtaining the wear type of the target drill bit according to the detection input parameters and the preset trained decision tree model.

[0084] Exemplarily, the meaning of drill bit wear includes but is not limited to the wear of inner and outer cutting teeth of the drill bit, etc. It should be noted that the specific meaning of drill bit wear can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0085] Illustratively, the drill bit involved in the embodiments of the present invention may be, but is not limited to, a PDC drill bit.

[0086] Exemplarily, the step S103 may be, but is not limited to, inputting the detection input parameters into the trained decision tree model for calculation to obtain the wear type output by the decision tree model. It should be noted that the specific implementation of step S103 may be determined by those skilled in the art according to actual conditions, and the above description is only for example and does not constitute a limitation thereto.

[0087] Preferably, after obtaining the wear type, the wear type can be sent to relevant staff, so that the staff can fully understand the wear condition of the target drill bit to adjust the corresponding drilling operation mode, and when the wear type is significant wear, a corresponding alarm can be given to the staff, so that the staff can promptly detect the significant wear of the drill bit and perform maintenance or replacement of the target drill bit, which is conducive to reducing the situation where the drill bit is completely damaged and difficult to repair, and enables the overall drilling operation to be carried out smoothly and efficiently.

[0088] For example, when the wear type of the target drill bit is significant wear, it means that the wear of the target drill bit is too severe and is not suitable for continuing drilling work and needs to be repaired or replaced. When the wear type of the target drill bit is not significant wear, it means that the wear of the target drill bit has not reached the level that significantly affects the normal drilling work, so that the target drill bit can continue drilling without the need for repair or replacement.

[0089] The drill bit wear type detection method and device provided by the present invention obtain corresponding state change rate parameters according to the working state parameters of the preset data sampling points of the target drill bit, and can obtain state change rate parameters that fully characterize and conform to the change of the working state of the drill bit based on the working state parameters collected at the data sampling points of the actual drilling operation and characterizing the actual working state (drilling effect) of the target drill bit, so that the obtained state change rate parameters have high accuracy, which is conducive to improving the accuracy of the overall detection process; by forming detection input parameters according to the engineering parameters of the data sampling points of the target drill bit, the working state parameters and the state change rate parameters, it is possible to comprehensively characterize the engineering parameters characterizing the mechanical properties and engineering properties of the target drill bit, the working state parameters characterizing the actual working state (drilling effect) of the target drill bit, and the working state parameters characterizing the drill bit working state of the target drill bit. The state change rate parameter of the state change situation forms the input information of the detection, which fully considers the law that the actual wear degree of the drill bit is closely related to the mechanical properties of the drill bit, the overall engineering properties, the actual working state of the drill bit and the change of the working state of the drill bit, so that the content of the input information used for detection is relatively comprehensive and closely corresponds to the wear condition of the drill bit, and the parameter range included is relatively wide, which is conducive to improving the accuracy of the overall detection process; by obtaining the wear type of the target drill bit according to the detection input parameters and the preset trained decision tree model, the decision tree model can be suitable for type detection and has the advantages of fast calculation and processing speed, so as to realize automatic detection based on the detection input parameters, quickly and accurately obtain the wear type of the target drill bit, greatly reduce the dependence on manual work, thereby greatly improving the speed and accuracy of the overall drill bit wear type detection. In addition, the drill bit wear type detection method and device provided by the present invention are based on input parameters that facilitate downhole measurement and preliminary analysis through sensors, computers and other equipment, and the overall analysis and calculation have a high degree of automation, and the information involved can also be quickly transmitted through the network and other means. Therefore, it also greatly reduces the reliance on field investigations and downhole short section measurement work, thereby significantly reducing the cost of overall drill bit wear type detection, and further improving the speed of overall drill bit wear type detection. Therefore, the drill bit wear type detection method and device provided by the present invention significantly improve the efficiency of drill bit wear type detection, which is conducive to the smooth, accurate and safe conduct of the overall drilling operation, and reduces the cost of the overall drilling operation. In summary, the drill bit wear type detection method and device provided by the present invention can improve the accuracy and speed of drill bit wear type detection, and reduce the cost of drill bit wear type detection, thereby improving the efficiency of drill bit wear type detection, and then improving the efficiency of the overall drilling operation.

[0090] In an optional embodiment, it further comprises:

[0091] Before obtaining the corresponding state change rate parameter according to the working state parameter of the preset data sampling point of the target drill bit,

[0092] According to the engineering parameters of the preset data sampling points of the target drill bit, the corresponding working state parameters are obtained, wherein the engineering parameters include the ground drilling pressure, ground torque, mechanical drilling speed, drill bit diameter and drill bit speed of the target drill bit, and the power drill speed displacement ratio of the power drill, the drilling fluid displacement flowing through the power drill, the maximum output torque of the power drill, the maximum pressure drop of the power drill and the actual drilling pressure drop of the power drill; the working state parameters include the drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth and drill bit wear coefficient of the target drill bit.

[0093] For example, the surface drilling pressure, surface torque, mechanical drilling speed, drill bit diameter and drill bit speed of the target drill bit can be directly collected and obtained through sensors corresponding to equipment such as comprehensive logging instruments, but not limited to, and can be displayed on a computing device, and can be transmitted or shared through a network. It should be noted that the specific sources of the surface drilling pressure, surface torque, mechanical drilling speed, drill bit diameter and drill bit speed of the target drill bit can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0094] For example, the power drill speed displacement ratio, the displacement of drilling fluid flowing through the power drill, the maximum output torque of the power drill, the maximum pressure drop of the power drill and the actual drilling pressure drop of the power drill can be directly acquired or queried through sensors corresponding to equipment such as comprehensive logging instruments (for example, querying the manual of the power drill and other materials) to obtain the power drill configuration information, but not limited to, and the above parameters can also be displayed on a computing device, and can also be transmitted or shared through a network. It should be noted that the specific sources of the power drill speed displacement ratio, the displacement of drilling fluid flowing through the power drill, the maximum output torque of the power drill, the maximum pressure drop of the power drill and the actual drilling pressure drop of the power drill can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0095] For example, the drill bit can be used together with a power drill or used alone when working. The power drill refers to a bottom hole drill that can convert the energy of the drilling fluid into drilling and rock breaking power, such as a turbine drill, a single screw drill, and an electric drill. Since the power drill (bottom hole motor) has a high rotation speed, it can significantly increase the mechanical drilling speed, especially when used in conjunction with a PDC drill bit, it will significantly increase the drilling speed. It should be noted that the matching of components when the drill bit is working and the specific functions of the power drill can be determined by those skilled in the art according to actual conditions. The above description is only an example and does not constitute a limitation.

[0096] Through the above steps, the engineering parameters of the target drill bit that can be directly collected and obtained can be used as a basis for processing to obtain the working status parameters, which can further make the working status parameters more consistent with the specific mechanical properties of the target drill bit and the corresponding overall engineering properties, thereby improving the accuracy of determining the engineering status parameters and thus improving the accuracy of the overall drill bit wear type detection.

[0097] In an optional embodiment, obtaining corresponding working state parameters according to the engineering parameters of the preset data sampling points of the target drill bit includes:

[0098] Determining whether the target drill bit is matched with a powered drill tool;

[0099] If not, the drill bit mechanical specific energy is obtained according to the surface drilling pressure, surface torque, mechanical drilling speed, drill bit diameter and drill bit speed; the drill bit friction coefficient is obtained according to the surface torque, surface drilling pressure and drill bit diameter; the drill bit cutting depth is obtained according to the mechanical drilling speed and drill bit speed; the drill bit wear coefficient is obtained according to the surface drilling pressure and drill bit cutting depth;

[0100] If so, the mechanical specific energy of the drill bit is obtained according to the surface drilling pressure, surface torque, mechanical drilling speed, drill bit diameter, drill bit speed, power drill speed displacement ratio, drilling fluid displacement flowing through the power drill, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill; the drill bit friction coefficient is obtained according to the surface torque, surface drilling pressure, drill bit diameter, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill; the drill bit cutting depth is obtained according to the mechanical drilling speed, drill bit speed, power drill speed displacement ratio and drilling fluid displacement flowing through the power drill; the drill bit wear coefficient is obtained according to the surface drilling pressure and drill bit cutting depth.

[0101] For example, when it is determined that the target drill bit does not match the power drill, the drill bit mechanical specific energy is obtained according to the ground drilling pressure, ground torque, mechanical drilling speed, drill bit diameter and drill bit speed, which can be specifically expressed as but not limited to the following formula:

[0102]

[0103] Wherein, MSE represents mechanical specific energy of drill bit, WOB represents ground bit pressure (unit may be but not limited to KN), T represents ground torque (unit may be but not limited to KN·m), ROP represents mechanical drilling speed (unit may be but not limited to m / h), d Brepresents the drill bit diameter (unit may be but not limited to mm), RPM represents the drill bit speed (unit may be but not limited to r / min), wherein the drill bit speed may be but not limited to the speed of the drill bit surface top drive or rotary table, and the drill bit mechanical specific energy may be but not limited to the drill bit rock breaking mechanical specific energy.

[0104] It should be noted that the specific implementation method for obtaining the drill bit mechanical specific energy based on the ground drilling pressure, ground torque, mechanical drilling speed, drill bit diameter and drill bit speed can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation to this.

[0105] For example, when it is determined that the target drill bit does not match the power drill, the drill bit friction coefficient is obtained according to the ground torque, ground drilling pressure and drill bit diameter, which can be specifically expressed as but not limited to the following formula:

[0106]

[0107] Wherein, μ represents the friction coefficient of the drill bit, T represents the ground torque (the unit may be, but is not limited to, KN·m), WOB represents the ground bit pressure (the unit may be, but is not limited to, KN), d B Indicates the drill bit diameter (the unit can be but is not limited to mm).

[0108] It should be noted that the specific implementation method of obtaining the drill bit friction coefficient according to the ground torque, ground drilling pressure and drill bit diameter can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation to this.

[0109] For example, when it is determined that the target drill bit does not match the power drill, the drill bit cutting depth is obtained according to the mechanical drilling speed and the drill bit rotation speed, which can be specifically expressed as but not limited to the following formula:

[0110]

[0111] Wherein, DOC represents the drill bit cutting depth (unit may be but not limited to mm / rad), ROP represents the mechanical drilling speed (unit may be but not limited to m / h), and RPM represents the drill bit speed (unit may be but not limited to r / min). Wherein, the drill bit cutting depth may be but not limited to the drill bit rock breaking cutting depth.

[0112] It should be noted that the specific implementation method for obtaining the drill bit cutting depth according to the mechanical drilling speed and the drill bit rotation speed can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0113] Exemplarily, when determining whether the target drill bit matches the power drill, the mechanical specific energy of the drill bit is obtained according to the surface drilling pressure, surface torque, mechanical drilling speed, drill bit diameter, drill bit speed, power drill speed displacement ratio, drilling fluid displacement flowing through the power drill, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill. Specifically, it can be expressed as but not limited to the following formula:

[0114]

[0115] Wherein, MSE represents mechanical specific energy of drill bit, WOB represents ground bit pressure (unit may be but not limited to KN), T represents ground torque (unit may be but not limited to KN·m), ROP represents mechanical drilling speed (unit may be but not limited to m / h), d B represents the drill diameter (unit may be but not limited to mm), RPM represents the drill speed (unit may be but not limited to r / min), K n represents the speed displacement ratio of the power drill (the unit may be but is not limited to r / L), Q represents the displacement of the drilling fluid flowing through the power drill (the unit may be but is not limited to L / s), T max Indicates the maximum output torque of the power drill (the unit can be but not limited to KN·m), ΔP max Indicates the maximum pressure drop of the power drill (the unit can be but not limited to MPa), ΔP PDM It indicates the actual drilling pressure drop of the power drill (the unit may be but is not limited to MPa). The drill bit speed may be but is not limited to the speed of the drill bit's surface top drive or rotary table, and the drill bit mechanical specific energy may be but is not limited to the drill bit's rock breaking mechanical specific energy.

[0116] It should be noted that the specific implementation method for obtaining the mechanical specific energy of the drill bit based on the ground drilling pressure, ground torque, mechanical drilling speed, drill bit diameter, drill bit speed, power drill speed displacement ratio, drilling fluid displacement flowing through the power drill, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill can be determined by those skilled in the art according to actual conditions, and the above description is only for example and does not constitute a limitation to this.

[0117] For example, when determining whether the target drill bit matches the power drill, the drill bit friction coefficient is obtained according to the ground torque, ground drilling pressure, drill bit diameter, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill. Specifically, it can be expressed as but not limited to the following formula:

[0118]

[0119] Wherein, μ represents the friction coefficient of the drill bit, T represents the ground torque (the unit may be, but is not limited to, KN·m), WOB represents the ground bit pressure (the unit may be, but is not limited to, KN), dB Indicates the drill diameter (unit can be but not limited to mm), T max Indicates the maximum output torque of the power drill (the unit can be but not limited to KN·m), ΔP max Indicates the maximum pressure drop of the power drill (the unit can be but not limited to MPa), ΔP PDM Indicates the actual drilling pressure drop of the power drill (the unit may be but is not limited to MPa).

[0120] It should be noted that the specific implementation method of obtaining the drill bit friction coefficient based on the ground torque, ground drilling pressure, drill bit diameter, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill can be determined by technical personnel in this field according to actual conditions. The above description is only for example and does not constitute a limitation to this.

[0121] For example, when determining whether the target drill bit matches the power drill, the drill bit cutting depth is obtained according to the mechanical drilling speed, the drill bit speed, the power drill speed displacement ratio and the drilling fluid displacement flowing through the power drill, which can be specifically expressed as but not limited to the following formula:

[0122]

[0123] Wherein, DOC represents the cutting depth of the drill bit (the unit may be but not limited to mm / rad), ROP represents the mechanical drilling speed (the unit may be but not limited to m / h), RPM represents the drill bit speed (the unit may be but not limited to r / min), K n represents the speed displacement ratio of the power drill (the unit may be but not limited to r / L), Q represents the displacement of the drilling fluid flowing through the power drill (the unit may be but not limited to L / s). The drill bit cutting depth may be but not limited to the rock breaking cutting depth of the drill bit.

[0124] It should be noted that the specific implementation method for obtaining the drill bit cutting depth based on the mechanical drilling speed, drill bit speed, power drill speed displacement ratio and drilling fluid displacement flowing through the power drill can be determined by those skilled in the art according to actual conditions, and the above description is only for example and does not constitute a limitation to this.

[0125] Exemplarily, the drill bit wear coefficient is obtained according to the ground drilling pressure and the drill bit cutting depth, which can be specifically expressed as but not limited to the following formula:

[0126]

[0127] Wherein, WF represents the drill bit wear coefficient, WOB represents the ground bit pressure (the unit may be but is not limited to KN), and DOC represents the drill bit cutting depth (the unit may be but is not limited to mm / rad).

[0128] It should be noted that the specific implementation method for obtaining the drill bit wear coefficient according to the ground drilling pressure and the drill bit cutting depth can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0129] Through the above steps, various working state parameters can be calculated based on the input-output correspondence of relevant standards in the relevant drill bit rock breaking effect evaluation index calculation model, which greatly improves the accuracy of determining the working state parameters, thereby further improving the accuracy of the overall drill bit wear type detection.

[0130] In an optional embodiment, if Figure 2 As shown, the method of obtaining the corresponding state change rate parameter according to the working state parameter of the preset data sampling point of the target drill bit includes the following steps:

[0131] S201: Determine the last data sampling point as the corresponding first target sampling point, and determine the last data sampling point among other data sampling points except the first target sampling point as the corresponding second target sampling point.

[0132] S202: Obtain the state change rate parameter according to the first working state parameter corresponding to the first target sampling point and the second working state parameter corresponding to the second target sampling point, wherein the state change rate parameter includes the mechanical specific energy change rate, the friction coefficient change rate, the cutting depth change rate and the wear coefficient change rate.

[0133] Exemplarily, the data sampling points may be, but are not limited to, data sampling points set at preset acquisition time intervals within a preset time interval when the target drill bit is in a drilling working state. For example, the time interval may be, but are not limited to, the last 10 minutes to 30 minutes of the target drill bit in drilling work, and the acquisition time interval may be, but are not limited to, 30 seconds to 180 seconds. Alternatively, the data sampling points may be, but are not limited to, data sampling points set at preset acquisition depth intervals within a preset drilling depth interval when the target drill bit is in a drilling working state. For example, the drilling depth interval may be, but are not limited to, the last 5 meters to 10 meters of the target drill bit in drilling work, and the acquisition depth interval may be, but are not limited to, 1 meter. It should be noted that the specific nature and basis of the data sampling points may be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0134] Exemplarily, the last data sampling point may be, but is not limited to, the data sampling point with the latest acquisition time or the deepest acquisition depth among the multiple data sampling points. It should be noted that the specific properties of the last data sampling point may be determined by those skilled in the art according to actual conditions, and the above description is only for example and does not constitute a limitation thereto.

[0135] Through the above steps, it is possible to fully consider that the last two data sampling points are close to the node where drilling ends in terms of depth and time during a drilling process. Therefore, the above steps can determine the corresponding working state change rate parameters based on the working state parameters of the drilling node corresponding to the current wear condition of the target drill bit that are closest to the two data sampling points, so that the working state change rate parameters are more consistent with the corresponding working state changes of the drill bit when the drill bit is in the current wear condition, thereby improving the accuracy of the state change rate parameters, thereby improving the accuracy of the overall drill bit wear type detection.

[0136] In an optional implementation, obtaining the state change rate parameter according to the first working state parameter corresponding to the first target sampling point and the second working state parameter corresponding to the second target sampling point includes:

[0137] Obtaining the mechanical specific energy change rate according to a first drill bit mechanical specific energy corresponding to the first working state parameter and a second drill bit mechanical specific energy corresponding to the second working state parameter;

[0138] Obtaining the friction coefficient change rate according to a first drill bit friction coefficient corresponding to the first working state parameter and a second drill bit friction coefficient corresponding to the second working state parameter;

[0139] Obtaining the cutting depth change rate according to a first drill bit cutting depth corresponding to the first working state parameter and a second drill bit cutting depth corresponding to the second working state parameter;

[0140] The wear coefficient change rate is obtained according to the first drill bit wear coefficient corresponding to the first working state parameter and the second drill bit wear coefficient corresponding to the second working state parameter.

[0141] Exemplarily, the mechanical specific energy change rate is obtained according to the first drill bit mechanical specific energy corresponding to the first working state parameter and the second drill bit mechanical specific energy corresponding to the second working state parameter, which may be, but is not limited to, obtaining the drill bit mechanical specific energy difference by subtracting the second drill bit mechanical specific energy from the first drill bit mechanical specific energy, and then dividing the drill bit mechanical specific energy difference by the second drill bit mechanical specific energy to obtain the mechanical specific energy change rate. It should be noted that the specific implementation method for obtaining the mechanical specific energy change rate according to the first drill bit mechanical specific energy corresponding to the first working state parameter and the second drill bit mechanical specific energy corresponding to the second working state parameter can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0142] Exemplarily, the friction coefficient change rate is obtained according to the first drill bit friction coefficient corresponding to the first working state parameter and the second drill bit friction coefficient corresponding to the second working state parameter, which may be, but not limited to, obtaining the drill bit friction coefficient difference by subtracting the second drill bit friction coefficient from the first drill bit friction coefficient, and then dividing the drill bit friction coefficient difference by the second drill bit friction coefficient to obtain the friction coefficient change rate. It should be noted that the specific implementation method for obtaining the friction coefficient change rate according to the first drill bit friction coefficient corresponding to the first working state parameter and the second drill bit friction coefficient corresponding to the second working state parameter can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0143] Exemplarily, the cutting depth change rate is obtained according to the first drill bit cutting depth corresponding to the first working state parameter and the second drill bit cutting depth corresponding to the second working state parameter, which can be, but not limited to, obtaining the drill bit cutting depth difference by subtracting the second drill bit cutting depth from the first drill bit cutting depth, and then dividing the drill bit cutting depth difference by the second drill bit cutting depth to obtain the cutting depth change rate. It should be noted that the specific implementation method for obtaining the cutting depth change rate according to the first drill bit cutting depth corresponding to the first working state parameter and the second drill bit cutting depth corresponding to the second working state parameter can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0144] Exemplarily, the wear coefficient change rate is obtained according to the first drill wear coefficient corresponding to the first working state parameter and the second drill wear coefficient corresponding to the second working state parameter, which may be, but is not limited to, obtaining the drill wear coefficient difference by subtracting the second drill wear coefficient from the first drill wear coefficient, and then dividing the drill wear coefficient difference by the second drill wear coefficient to obtain the wear coefficient change rate. It should be noted that the specific implementation method for obtaining the wear coefficient change rate according to the first drill wear coefficient corresponding to the first working state parameter and the second drill wear coefficient corresponding to the second working state parameter can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0145] Through the above steps, the corresponding working state change rate parameter can be further determined based on the specific difference in the working state parameters of the two data sampling points closest to the drilling node corresponding to the current wear condition of the target drill bit, so that the working state change rate parameter is further more consistent with the corresponding change in the working state of the drill bit when the drill bit is in the current wear condition, further improving the accuracy of the state change rate parameter, thereby further improving the accuracy of the overall drill bit wear type detection.

[0146] In an optional embodiment, it further comprises:

[0147] Before obtaining the corresponding working state parameters according to the engineering parameters of the preset data sampling points of the target drill bit,

[0148] The actual drilling pressure drop of the power drilling tool is obtained by subtracting the second riser pressure when the target drill bit is lifted from the corresponding bottom of the well to a preset drilling depth from the first riser pressure when the target drill bit is drilling normally.

[0149] For example, the first riser pressure when the target drill bit is drilling normally and the second riser pressure when the target drill bit is lifted from the corresponding bottom of the well to a preset drilling depth can be directly collected and obtained by, but not limited to, sensors corresponding to equipment such as comprehensive logging instruments. It should be noted that the specific sources of the first riser pressure and the second riser pressure can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0150] Exemplarily, the preset drilling depth may be, but is not limited to, a depth less than 1 m from the bottom of the well. It should be noted that the preset drilling depth may be determined by those skilled in the art based on actual conditions, and the above description is for illustrative purposes only and does not constitute a limitation thereto.

[0151] For example, the specific reason for lifting the target drill bit from the bottom of the well may be, but is not limited to, the reason for engineering requirements or the reason for natural force after drilling is stopped. It should be noted that the specific reason for lifting the target drill bit from the bottom of the well can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0152] Through the above steps, the situation that the actual drilling pressure drop of the power drill is not convenient to be directly collected and obtained can be fully considered. By using calculation, the accuracy of the actual drilling pressure drop of the power drill can be improved, and the cost and time of determining the actual drilling pressure drop can be indirectly reduced, thereby improving the accuracy and speed of the overall drill bit wear type detection and reducing the overall cost.

[0153] In an optional embodiment, forming the detection input parameters according to the engineering parameters of the data sampling points of the target drill bit, the working state parameters and the state change rate parameters includes:

[0154] The detection input parameters are formed according to the drilling footage, pure drilling time, footage time, mechanical drilling speed, drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth, drill bit wear coefficient, mechanical specific energy change rate, friction coefficient change rate, cutting depth change rate and wear coefficient change rate of the target drill bit, wherein the engineering parameters include the drilling footage, pure drilling time, footage time and mechanical drilling speed of the target drill bit, the working state parameters include the drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth and drill bit wear coefficient of the target drill bit, and the state change rate parameters include the mechanical specific energy change rate, friction coefficient change rate, cutting depth change rate and wear coefficient change rate of the target drill bit.

[0155] Exemplarily, the pure drilling time refers to the time that the drill bit actually performs rock breaking work during a drilling process, which can be obtained by accumulating each drilling time (the time required to drill one meter, in units of min / m) during the drilling process (from the start of work to the end of work), wherein the drilling time can be directly collected and acquired by instruments and equipment. For example, in a drilling process, the drill bit starts to drill downward from a depth of 300 meters, and ends the drilling process and starts drilling when it reaches a depth of 500 meters. The pure drilling time can be obtained by, but not limited to, accumulating the drilling time of each meter from 300 meters to 500 meters in depth (about 200 drilling hours). It should be noted that the nature and specific determination method of the pure drilling time can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation to this.

[0156] For example, the footage time is specifically the time difference between the time point when the drill bit starts drilling and the time point when the drill bit ends drilling (usually the time point when the drill starts drilling during the drilling process) during a drilling trip, and the time point when the drill bit starts drilling and the time point when the drill bit ends drilling can be directly obtained. It should be noted that the nature and specific determination method of the footage time can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0157] For example, the drilling footage can be obtained by, but not limited to, subtracting the starting depth of the target drill bit when it is just lowered into the bottom of the well from the corresponding starting depth when the target drill bit is pulled out of the well for various reasons after drilling a certain footage, or collected by relevant equipment and sensors. It should be noted that the nature and specific determination method of the drilling footage can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0158] For example, the pure drilling time may be, but is not limited to, the time that the target drill bit is drilling pure rock at the bottom of the well, and the footage time may be, but is not limited to, the accumulated time of drilling auxiliary processes such as reaming and short start. It should be noted that the nature of the pure drilling time and footage time can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0159] Exemplarily, the detection input parameters are formed according to the drilling footage, pure drilling time, footage time, mechanical drilling speed, drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth, drill bit wear coefficient, mechanical specific energy change rate, friction coefficient change rate, cutting depth change rate and wear coefficient change rate of the target drill bit. The detection input parameters may be formed by, but not limited to, integrating and splicing the drilling footage, pure drilling time, footage time, mechanical drilling speed, drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth, drill bit wear coefficient, mechanical specific energy change rate, friction coefficient change rate, cutting depth change rate and wear coefficient change rate of the target drill bit as elements of a vector or matrix to obtain the detection input parameters in the form of a vector or matrix. It should be noted that the specific implementation method of forming the detection input parameters according to the drilling footage, pure drilling time, footage time, mechanical drilling speed, drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth, drill bit wear coefficient, mechanical specific energy change rate, friction coefficient change rate, cutting depth change rate and wear coefficient change rate of the target drill bit can be determined by those skilled in the art according to actual conditions, and the above description is only for example and does not constitute a limitation thereto.

[0160] Through the above steps, the parameter granularity based on which the detection input parameters are formed can be refined, and some relatively important engineering parameters characterizing the mechanical properties and engineering properties of the target drill bit, the working state parameters characterizing the actual working state (drilling effect) of the target drill bit, and the state change rate parameters characterizing the change of the working state of the target drill bit can be integrated to form the input information for the detection, which can further improve the accuracy of the input information, thereby further improving the accuracy of the overall drill wear type detection.

[0161] In an optional embodiment, it further comprises:

[0162] Before obtaining the wear type of the target drill bit according to the detection input parameters and the preset trained decision tree model,

[0163] According to the historical working state parameters of the preset historical sampling points of the plurality of historical drill bits, the historical state change rate parameters of the corresponding historical drill bits are obtained;

[0164] Forming an input sample according to the historical engineering parameters corresponding to the historical sampling points of the historical drill bit, the historical working state parameters and the historical state change rate parameters;

[0165] Taking the historical wear type corresponding to the historical drill bit as the corresponding output sample, and forming a corresponding sample to be selected according to the input sample corresponding to the historical drill bit and the corresponding output sample;

[0166] According to a preset sample ratio, a corresponding plurality of training samples and a plurality of test samples are determined from a plurality of samples to be selected, and a preset untrained decision tree model is trained using the plurality of training samples and test samples to obtain a trained decision tree model.

[0167] Exemplarily, the corresponding sample to be selected is formed according to the input sample and the corresponding output sample corresponding to the historical drill bit, which may be, but is not limited to, integrating the corresponding input sample and the output sample of the historical drill bit to obtain the sample to be selected corresponding to the historical drill bit. Among them, one historical drill bit corresponds to one historical drilling project (commonly referred to as one drilling trip), corresponding to one input sample, one output sample and one sample to be selected. It should be noted that the specific implementation method for forming the corresponding sample to be selected according to the input sample and the corresponding output sample corresponding to the historical drill bit can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation to this.

[0168] Exemplarily, the determining of the corresponding multiple training samples and multiple test samples from multiple samples to be selected according to a preset sample ratio may be, but is not limited to, determining the ratio of the number of training samples to the number of test samples according to the sample ratio, and based on the ratio of the number of training samples to the number of test samples, determining the corresponding training samples and test samples from multiple samples to be selected. The ratio of the number of training samples to the number of test samples may be, but is not limited to, 10:1 to 15:1. It should be noted that the specific implementation method and specific ratio value for determining the corresponding multiple training samples and multiple test samples from multiple samples to be selected according to the preset sample ratio may be determined by a person skilled in the art according to actual conditions, and the above description is for example only and does not constitute a limitation thereto.

[0169] Exemplarily, using training samples and test samples to train a model is a conventional technical means in the art and will not be described in detail here.

[0170] Through the above steps, samples can be formed based on historical engineering parameters, historical working state parameters, historical state change rate parameters and corresponding wear types of actual historical drill bits, so that the samples can accurately and fully characterize the features closely related to the historical drill bit wear conditions, thereby improving the accuracy of the training model, and making the obtained trained decision tree model have a faster computing speed and higher computing accuracy, thereby improving the accuracy and speed of subsequent detection of the target drill bit wear type.

[0171] In an optional embodiment, it further comprises:

[0172] Before obtaining the historical state change rate parameters of the corresponding historical drill bits according to the historical working state parameters of the preset historical sampling points of the plurality of historical drill bits,

[0173] According to the historical engineering parameters of preset historical sampling points of multiple historical drill bits, corresponding historical working status parameters are obtained, wherein the historical engineering parameters include the historical ground drilling pressure, historical ground torque, historical mechanical drilling speed, historical drill bit diameter and historical drill bit speed of the historical drill bit, as well as the historical power drill speed displacement ratio of the power drill, the historical drilling fluid displacement flowing through the power drill, the historical maximum output torque of the power drill, the historical maximum pressure drop of the power drill and the historical actual drilling pressure drop of the power drill, and the historical working status parameters include the historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth and historical drill bit wear coefficient of the historical drill bit.

[0174] For example, the historical ground drilling pressure, historical ground torque, historical mechanical drilling speed, historical drill bit diameter and historical drill bit speed of the historical drill bit can be directly collected and obtained through, but not limited to, sensors corresponding to equipment such as integrated logging instruments, and can be displayed on a computing device, and can be transmitted or shared through a network. It should be noted that the specific sources of the historical ground drilling pressure, historical ground torque, historical mechanical drilling speed, historical drill bit diameter and historical drill bit speed of the historical drill bit can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0175] For example, the historical power drill speed displacement ratio, historical drilling fluid displacement through the power drill, historical maximum output torque of the power drill, historical maximum pressure drop of the power drill and historical actual drilling pressure drop of the power drill can be directly acquired or queried through sensors corresponding to equipment such as comprehensive logging instruments, etc. (for example, querying the manual of the power drill and other materials), and the above parameters can also be displayed on a computing device, and can also be transmitted or shared through a network. It should be noted that the specific sources of the historical power drill speed displacement ratio, historical drilling fluid displacement through the power drill, historical maximum output torque of the power drill, historical maximum pressure drop of the power drill and historical actual drilling pressure drop of the power drill can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0176] Preferably, the historical power drill tool actual drilling pressure drop can be obtained by, but not limited to, subtracting the riser pressure when the historical drill bit is lifted from the corresponding bottom of the well to a preset drilling depth from the riser pressure when the historical drill bit is drilling normally. The preset drilling depth may be, but not limited to, a depth less than 1 m from the bottom of the well. Determining the historical power drill tool actual drilling pressure drop in this way can fully consider the situation where the power drill tool actual drilling pressure drop is not convenient to be directly collected and obtained, and using calculation to obtain it can improve the accuracy of the determined historical power drill tool actual drilling pressure drop, and indirectly reduce the cost and time of determining the actual drilling pressure drop, thereby improving the accuracy and speed of the overall drill bit wear type detection and reducing the overall cost.

[0177] Through the above steps, the historical engineering parameters of the historical drill bit that can be directly collected and obtained can be used as the basis for processing to obtain the historical working status parameters, which can further make the historical working status parameters more consistent with the specific mechanical properties of the historical drill bit and the corresponding overall engineering properties, thereby improving the accuracy of determining the historical engineering status parameters, thereby improving the accuracy of subsequent model training, and further improving the accuracy of overall drill bit wear type detection.

[0178] In an optional embodiment, the obtaining of corresponding historical working state parameters according to historical engineering parameters of preset historical sampling points of multiple historical drill bits includes:

[0179] Determining whether the historical drill bit is matched with a powered drill tool;

[0180] If not, the historical drill bit mechanical specific energy is obtained according to the historical ground drilling pressure, historical ground torque, historical mechanical drilling speed, historical drill bit diameter and historical drill bit speed; the historical drill bit friction coefficient is obtained according to the historical ground torque, historical ground drilling pressure and historical drill bit diameter; the historical drill bit cutting depth is obtained according to the historical mechanical drilling speed and historical drill bit speed; the historical drill bit wear coefficient is obtained according to the historical ground drilling pressure and historical drill bit cutting depth;

[0181] If so, the historical drill bit mechanical specific energy is obtained based on the historical surface drilling pressure, historical surface torque, historical mechanical drilling speed, historical drill bit diameter, historical drill bit speed, historical power drill speed displacement ratio, historical drilling fluid displacement through the power drill, historical power drill maximum output torque, historical power drill maximum pressure drop and historical power drill actual drilling pressure drop; the historical drill bit friction coefficient is obtained based on the historical surface torque, historical surface drilling pressure, historical drill bit diameter, historical power drill maximum output torque, historical power drill maximum pressure drop and historical power drill actual drilling pressure drop; the historical drill bit cutting depth is obtained based on the historical mechanical drilling speed, historical drill bit speed, historical power drill speed displacement ratio and historical drilling fluid displacement through the power drill; the historical drill bit wear coefficient is obtained based on the historical surface drilling pressure and historical drill bit cutting depth.

[0182] Exemplarily, under the condition that the historical drill bit is not matched with a power drill, the historical drill bit mechanical specific energy is obtained according to the historical ground drilling pressure, historical ground torque, historical mechanical drilling speed, historical drill bit diameter and historical drill bit speed; the historical drill bit friction coefficient is obtained according to the historical ground torque, historical ground drilling pressure and historical drill bit diameter; the historical drill bit cutting depth is obtained according to the historical mechanical drilling speed and historical drill bit speed; and the historical drill bit wear coefficient is obtained according to the historical ground drilling pressure and historical drill bit cutting depth. For specific principles, reference may be made to the description of the steps of obtaining the drill bit mechanical specific energy according to the ground drilling pressure, ground torque, mechanical drilling speed, drill bit diameter and drill bit speed; obtaining the drill bit friction coefficient according to the ground torque, ground drilling pressure and drill bit diameter; obtaining the drill bit cutting depth according to the mechanical drilling speed and drill bit speed; and obtaining the drill bit wear coefficient according to the ground drilling pressure and drill bit cutting depth in the embodiments of the present invention, which will not be repeated here.

[0183] Exemplarily, under the condition that the historical drill bit matches the power drill, the historical drill bit mechanical specific energy is obtained according to the historical surface drilling pressure, historical surface torque, historical mechanical drilling speed, historical drill bit diameter, historical drill bit speed, historical power drill speed displacement ratio, historical drilling fluid displacement through the power drill, historical maximum output torque of the power drill, historical maximum pressure drop of the power drill and historical actual drilling pressure drop of the power drill; the historical drill bit friction coefficient is obtained according to the historical surface torque, historical surface drilling pressure, historical drill bit diameter, historical maximum output torque of the power drill, historical maximum pressure drop of the power drill and historical actual drilling pressure drop of the power drill; the historical drill bit cutting depth is obtained according to the historical mechanical drilling speed, historical drill bit speed, historical power drill speed displacement ratio and historical drilling fluid displacement through the power drill; the historical surface drilling pressure and The specific principle of obtaining the historical drill bit wear coefficient based on the historical drill bit cutting depth can refer to the embodiments of the present invention for obtaining the drill bit mechanical specific energy according to the ground drilling pressure, ground torque, mechanical drilling speed, drill bit diameter, drill bit speed, power drill speed displacement ratio, drilling fluid displacement flowing through the power drill, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill; obtaining the drill bit friction coefficient according to the ground torque, ground drilling pressure, drill bit diameter, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill; obtaining the drill bit cutting depth according to the mechanical drilling speed, drill bit speed, power drill speed displacement ratio and drilling fluid displacement flowing through the power drill; and obtaining the drill bit wear coefficient according to the ground drilling pressure and drill bit cutting depth, which will not be repeated here.

[0184] Through the above steps, the historical working state parameters can be calculated based on the input-output correspondence of the relevant standards in the relevant drill bit rock breaking effect evaluation index calculation model, which greatly improves the accuracy of determining the historical working state parameters, thereby greatly improving the accuracy of subsequent model training, and further improving the accuracy of the overall drill bit wear type detection.

[0185] In an optional embodiment, if Figure 3 As shown, the method of obtaining the historical state change rate parameter of the corresponding historical drill bit according to the historical working state parameters of the preset historical sampling points of multiple historical drill bits includes the following steps:

[0186] S301: Determine the last historical sampling point as the corresponding third target sampling point, and determine the last historical sampling point among other historical sampling points except the third target sampling point as the corresponding fourth target sampling point.

[0187] S302: Obtain the historical state change rate parameter according to the first historical working state parameter corresponding to the third target sampling point and the second historical working state parameter corresponding to the fourth target sampling point, wherein the historical state change rate parameter includes the historical mechanical specific energy change rate, the historical friction coefficient change rate, the historical cutting depth change rate and the historical wear coefficient change rate.

[0188] Exemplarily, the historical sampling points may specifically be, but are not limited to, data sampling points set at preset acquisition time intervals within a preset time interval when the historical drill bit is in a drilling working state. For example, the time interval may be, but are not limited to, the last 10 minutes to 30 minutes of the historical drill bit in drilling work, and the acquisition time interval may be, but are not limited to, 30 seconds to 180 seconds. Alternatively, the historical sampling points may also be, but are not limited to, data sampling points set at preset acquisition depth intervals within a preset drilling depth interval when the historical drill bit is in a drilling working state. For example, the drilling depth interval may be, but are not limited to, the last 5 meters to 10 meters of the historical drill bit in drilling work, and the acquisition depth interval may be, but are not limited to, 1 meter. It should be noted that the specific nature and basis of the historical sampling points may be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0189] Exemplarily, the last historical sampling point may be, but is not limited to, a historical sampling point with the latest acquisition time or the deepest acquisition depth among multiple historical sampling points. It should be noted that the specific properties of the last historical sampling point may be determined by those skilled in the art according to actual conditions, and the above description is only for example and does not constitute a limitation thereto.

[0190] Exemplarily, step S302 may be, but is not limited to, obtaining the historical mechanical specific energy change rate based on the first historical drill bit mechanical specific energy corresponding to the first historical working state parameter and the second historical drill bit mechanical specific energy corresponding to the second historical working state parameter; obtaining the historical friction coefficient change rate based on the first historical drill bit friction coefficient corresponding to the first historical working state parameter and the second historical drill bit friction coefficient corresponding to the second historical working state parameter; obtaining the historical cutting depth change rate based on the first historical drill bit cutting depth corresponding to the first historical working state parameter and the second historical drill bit cutting depth corresponding to the second historical working state parameter; obtaining the historical wear coefficient change rate based on the first historical drill bit wear coefficient corresponding to the first historical working state parameter and the second historical drill bit wear coefficient corresponding to the second historical working state parameter.

[0191] Among them, the specific principle of obtaining the historical mechanical specific energy change rate according to the first historical drill bit mechanical specific energy corresponding to the first historical working state parameter and the second historical drill bit mechanical specific energy corresponding to the second historical working state parameter can refer to the description of the step of obtaining the mechanical specific energy change rate according to the first drill bit mechanical specific energy corresponding to the first working state parameter and the second drill bit mechanical specific energy corresponding to the second working state parameter in the embodiment of the present invention, which will not be repeated here. The specific principle of obtaining the historical friction coefficient change rate according to the first historical drill bit friction coefficient corresponding to the first historical working state parameter and the second historical drill bit friction coefficient corresponding to the second historical working state parameter can refer to the description of the step of obtaining the friction coefficient change rate according to the first drill bit friction coefficient corresponding to the first working state parameter and the second drill bit friction coefficient corresponding to the second working state parameter in the embodiment of the present invention, which will not be repeated here. The specific principle of obtaining the historical cutting depth change rate according to the first historical drill bit cutting depth corresponding to the first historical working state parameter and the second historical drill bit cutting depth corresponding to the second historical working state parameter can refer to the description of the step of obtaining the cutting depth change rate according to the first drill bit cutting depth corresponding to the first working state parameter and the second drill bit cutting depth corresponding to the second working state parameter in the embodiment of the present invention, which will not be repeated here. The specific principle of obtaining the historical wear coefficient change rate according to the first historical drill bit wear coefficient corresponding to the first historical working state parameter and the second historical drill bit wear coefficient corresponding to the second historical working state parameter can refer to the description of the step of obtaining the wear coefficient change rate according to the first drill bit wear coefficient corresponding to the first working state parameter and the second drill bit wear coefficient corresponding to the second working state parameter in the embodiment of the present invention, which will not be repeated here.

[0192] It should be noted that the specific implementation of step S302 can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0193] Through the above steps, it is possible to fully consider that the last two historical sampling points are close to the node where drilling ends in terms of depth and time during a historical drilling process. Therefore, the above steps can determine the corresponding historical working state change rate parameters based on the difference in working state parameters of the drilling node corresponding to the current wear condition of the historical drill bit closest to the two historical sampling points, so that the historical working state change rate parameters are more consistent with the corresponding drill bit working state changes when the historical drill bit is in the wear condition when being sampled, thereby improving the accuracy of the historical state change rate parameters, thereby improving the accuracy of subsequent model training, and further improving the accuracy of the overall drill bit wear type detection.

[0194] In an optional embodiment, the forming of the input sample according to the historical engineering parameters corresponding to the historical sampling points of the historical drill bit, the historical working state parameters and the historical state change rate parameters comprises:

[0195] The input sample corresponding to the historical drill bit is formed according to the historical drilling footage, historical pure drilling time, historical footage time, historical mechanical drilling speed, historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth, historical drill bit wear coefficient, historical mechanical specific energy change rate, historical friction coefficient change rate, historical cutting depth change rate and historical wear coefficient change rate of the historical drill bit, wherein the historical engineering parameters include the historical drilling footage, historical pure drilling time, historical footage time and historical mechanical drilling speed of the historical drill bit, the historical working state parameters include the historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth and historical drill bit wear coefficient of the historical drill bit, and the historical state change rate parameters include the historical mechanical specific energy change rate, historical friction coefficient change rate, historical cutting depth change rate and historical wear coefficient change rate of the historical drill bit.

[0196] Exemplarily, the properties and specific determination methods of the historical drilling footage, historical pure drilling time and historical footage time can refer to the description of the drilling footage, pure drilling time and footage time in the embodiments of the present invention, which will not be repeated here.

[0197] Exemplarily, the input sample corresponding to the historical drill bit is formed based on the historical drilling footage, historical pure drilling time, historical footage time, historical mechanical drilling rate, historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth, historical drill bit wear coefficient, historical mechanical specific energy change rate, historical friction coefficient change rate, historical cutting depth change rate and historical wear coefficient change rate of the historical drill bit. The input sample may be formed by, but is not limited to, integrating and splicing the historical drilling footage, historical pure drilling time, historical footage time, historical mechanical drilling rate, historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth, historical drill bit wear coefficient, historical mechanical specific energy change rate, historical friction coefficient change rate, historical cutting depth change rate and historical wear coefficient change rate as elements of a vector or matrix to obtain the input sample in the form of a vector or matrix. It should be noted that, the specific implementation method of forming the input sample corresponding to the historical drill bit based on the historical drilling footage, historical pure drilling time, historical footage time, historical mechanical drilling speed, historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth, historical drill bit wear coefficient, historical mechanical specific energy change rate, historical friction coefficient change rate, historical cutting depth change rate and historical wear coefficient change rate of the historical drill bit can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0198] Through the above steps, the parameter granularity for forming input samples can be refined, and some relatively important historical engineering parameters that characterize the mechanical properties and engineering properties of historical drill bits, historical working state parameters that characterize the actual working states (drilling effects) of historical drill bits, and historical state change rate parameters that characterize the changes in the working states of historical drill bits can be integrated to form input samples, which can further improve the accuracy of the input samples, thereby further improving the accuracy of subsequent model training, and further improving the accuracy of overall drill bit wear type detection.

[0199] In an optional embodiment, if Figure 4 As shown, further comprising the following steps:

[0200] S401: Before using the historical wear type corresponding to the historical drill bit as the corresponding output sample, determine the starting drilling reasons of multiple historical drill bits according to a preset drill bit wear grading standard, and determine the historical drill bit corresponding to the starting drilling reason of the associated drill bit wear condition as the selected drill bit.

[0201] S402: Determine wear status levels corresponding to the plurality of selected drill bits according to the drill bit wear grading standard.

[0202] S403: Based on the wear status levels of the plurality of selected drill bits, determine the historical wear types corresponding to the plurality of historical drill bits, wherein the historical wear types are significant wear or insignificant wear.

[0203] Exemplarily, the drill bit wear grading standard is specifically the IADC drill bit wear grading standard, wherein the IADC specifically refers to the International Association of Drilling Contractors (International Association of Drilling Contractors).

[0204] Exemplarily, the step S401 may be based on, but not limited to, the specific content of the drill bit wear classification standard, and determine the corresponding drilling cause for the relevant characteristics of the historical drill bit through the corresponding algorithm, program, software or manual method, and determine the historical drill bit corresponding to the drilling cause associated with the drill bit wear as the selected drill bit. For example, in the IADC drill bit wear classification standard, the drilling causes set include: PR-slow mechanical drilling speed, BHA-replacement of drill bit assembly, CM-adjustment of mud, CP-reaching coring depth, DMF-downhole motor failure, DP-drilling cement plug, DSF-drilling tool failure, DTF-downhole tool failure, FM-formation change, TQ-torque change, WO-drilling tool puncture, TW-drilling tool tripping, HP-complex wellbore and TD-drilling to target depth, then the drilling cause associated with the drill bit wear is determined to be PR-slow mechanical drilling speed (other drilling causes cannot reflect a direct correlation with drill bit wear). It should be noted that the specific implementation of step S401 can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0205] Exemplarily, the step S402 may be based on, but not limited to, the specific content of the drill bit wear grading standard, and determine the wear state level of the selected drill bit according to the relevant characteristics of the selected drill bit through corresponding algorithms, programs, software or manual methods. For example, in the IADC drill bit wear grading standard, the drill bit wear state levels set include 0 to 8, wherein the higher the level (the larger the corresponding level number), the more serious the drill bit wear. It should be noted that the specific implementation of step S402 can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0206] Through step S401, historical drill bits can be screened, and drill bits that may be pulled out of the drill due to severe drill bit wear can be screened, so that the selected drill bits obtained by screening are suitable as the basis for subsequent determination of historical wear types, which is more consistent with the actual operation rules, and indirectly helps to improve the accuracy and speed of subsequent model training. Through step S402, the wear state level that characterizes the specific degree of wear can be accurately determined, laying a good foundation for the subsequent steps of determining the historical wear type. Through step S403, the historical wear types of multiple historical drill bits can be determined based on the wear state levels of multiple selected drill bits, and the wear state distribution of multiple selected drill bits can be comprehensively considered, which can improve the accuracy of the determined historical wear types, thereby improving the accuracy of subsequent model training, and then improving the accuracy of subsequent drill bit wear type detection.

[0207] In an optional embodiment, if Figure 5As shown, the method of determining the historical wear types corresponding to the plurality of historical drill bits based on the wear state levels of the plurality of selected drill bits comprises the following steps:

[0208] S501: Based on the wear status levels of the plurality of selected drill bits, determine the number of selected drill bits having a wear status level higher than or equal to each standard status level preset in the drill bit wear grading standard.

[0209] S502: Obtaining a ratio of the number of drill bits corresponding to each standard status level according to the number of selected drill bits corresponding to each standard status level and the total number of all selected drill bits.

[0210] S503: Determine the highest standard status level among the standard status levels in which the proportion of the number of drill bits is greater than or equal to a preset proportion threshold as a critical wear amount level.

[0211] S504: Determine, according to the drill bit wear grading standard, wear status grades corresponding to other historical drill bits in the historical drill bits except the selected drill bit;

[0212] S505: Determine the historical wear type of the historical drill bit whose wear state level is higher than or equal to the critical wear amount level as significant wear, and determine the historical wear type of the historical drill bit whose wear state level is lower than the critical wear amount level as insignificant wear.

[0213] Exemplarily, the step S501 has the following example:

[0214] In the IADC drill bit wear grading standard, the standard status levels are 0, 1, 2, 3, 4, 5, 6, 7 and 8 respectively. It is necessary to separately determine the number of selected drill bits whose wear status level is determined to be higher than or equal to level 0 (including the cumulative number of selected drill bits of levels 0, 1, 2, 3, 4, 5, 6, 7 and 8), the number of selected drill bits whose wear status level is determined to be higher than or equal to level 1 (including the cumulative number of selected drill bits of levels 1, 2, 3, 4, 5, 6, 7 and 8), the number of selected drill bits whose wear status level is determined to be higher than or equal to level 2 (including the cumulative number of selected drill bits of levels 2, 3, 4, 5, 6, 7 and 8), the number of selected drill bits whose wear status level is determined to be higher than or equal to level 3 (including the cumulative number of selected drill bits of levels 3, 4, 5, 6, 7 and 8 The selected drill bits include the cumulative number of selected drill bits of the selected drill bits with wear status levels higher than or equal to level 4 (including the cumulative number of selected drill bits with levels 4, 5, 6, 7 and 8), the selected drill bits include the cumulative number of selected drill bits of the selected drill bits with wear status levels higher than or equal to level 5 (including the cumulative number of selected drill bits with levels 5, 6, 7 and 8), the selected drill bits include the cumulative number of selected drill bits of the selected drill bits with wear status levels higher than or equal to level 6 (including the cumulative number of selected drill bits with levels 6, 7 and 8), the selected drill bits include the cumulative number of selected drill bits of the selected drill bits with wear status levels higher than or equal to level 7 (including the cumulative number of selected drill bits with levels 7 and 8), and the selected drill bits include the selected drill bits with wear status level 8.

[0215] Among them, one standard status level corresponds to one selected drill head quantity.

[0216] It should be noted that the specific implementation of step S501 can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0217] Exemplarily, the step S502 may be, but is not limited to, dividing the number of selected drill bits corresponding to each standard status level by the total number to obtain the corresponding drill bit quantity ratio. One standard status level corresponds to one drill bit quantity ratio. It should be noted that the specific implementation of step S502 can be determined by those skilled in the art according to actual conditions, and the above description is only for example and does not constitute a limitation thereto.

[0218] For example, the percentage threshold may be determined by those skilled in the art according to actual conditions, and the present invention does not limit this. For example, the percentage threshold may be, but is not limited to, 50% or 75%.

[0219] Exemplarily, the step S503 has the following example:

[0220] The proportion threshold has been determined to be 75%. In the IADC drill wear grading standard, the proportion of drill bits corresponding to standard status level 0 is 100%, the proportion of drill bits corresponding to level 1 is 95%, the proportion of drill bits corresponding to level 2 is 90%, the proportion of drill bits corresponding to level 3 is 85%, the proportion of drill bits corresponding to level 4 is 80%, the proportion of drill bits corresponding to level 5 is 77%, the proportion of drill bits corresponding to level 6 is 76%, the proportion of drill bits corresponding to level 7 is 20%, and the proportion of drill bits corresponding to level 8 is 5%. The standard status levels in which the proportion of drill bits is greater than or equal to the preset proportion threshold include levels 1 to 6, among which the highest is level 6, and the critical wear level is determined to be level 6.

[0221] It should be noted that the specific implementation of step S503 can be determined by those skilled in the art according to actual conditions, and the above description is only an example and does not constitute a limitation thereto.

[0222] Exemplarily, the specific principle of step S504 may refer to the description of step S402 in the embodiment of the present invention, which will not be repeated here.

[0223] Through the above steps, the determined critical wear level can be closely related to the wear state distribution of the selected drill bit, and full consideration is given to the rule that if the proportion of the number of drill bits corresponding to a certain standard state level is just greater than and close to the preset proportion threshold, it means that the standard state level is consistent with the expected boundary between significant wear and insignificant wear, thereby improving the accuracy of the determined critical wear level, and further making the dividing boundary for determining the historical wear type (significant wear and insignificant wear) of the historical drill bit potentially consistent with the expected boundary, thereby improving the accuracy of determining the historical wear type of the historical drill bit, thereby improving the accuracy of subsequent model training, thereby improving the accuracy of subsequent target drill bit wear type detection.

[0224] Based on the same principle, the embodiment of the present invention discloses a drill wear type detection device 600, such as Figure 6 As shown, the drill wear type detection device 600 includes:

[0225] The change rate determination module 601 is used to obtain the corresponding state change rate parameter according to the working state parameter of the preset data sampling point of the target drill bit;

[0226] An input determination module 602 is used to form a detection input parameter according to the engineering parameters of the data sampling point of the target drill bit, the working state parameters and the state change rate parameters;

[0227] The type detection module 603 is used to obtain the wear type of the target drill bit according to the detection input parameters and the preset trained decision tree model.

[0228] In an optional embodiment, the system further includes a working state parameter determination module, which is used to:

[0229] Before obtaining the corresponding state change rate parameter according to the working state parameter of the preset data sampling point of the target drill bit,

[0230] According to the engineering parameters of the preset data sampling points of the target drill bit, the corresponding working state parameters are obtained, wherein the engineering parameters include the ground drilling pressure, ground torque, mechanical drilling speed, drill bit diameter and drill bit speed of the target drill bit, and the power drill speed displacement ratio of the power drill, the drilling fluid displacement flowing through the power drill, the maximum output torque of the power drill, the maximum pressure drop of the power drill and the actual drilling pressure drop of the power drill; the working state parameters include the drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth and drill bit wear coefficient of the target drill bit.

[0231] In an optional implementation, the working state parameter determination module is used to:

[0232] Determining whether the target drill bit is matched with a powered drill tool;

[0233] If not, the drill bit mechanical specific energy is obtained according to the surface drilling pressure, surface torque, mechanical drilling speed, drill bit diameter and drill bit speed; the drill bit friction coefficient is obtained according to the surface torque, surface drilling pressure and drill bit diameter; the drill bit cutting depth is obtained according to the mechanical drilling speed and drill bit speed; the drill bit wear coefficient is obtained according to the surface drilling pressure and drill bit cutting depth;

[0234] If so, the mechanical specific energy of the drill bit is obtained according to the surface drilling pressure, surface torque, mechanical drilling speed, drill bit diameter, drill bit speed, power drill speed displacement ratio, drilling fluid displacement flowing through the power drill, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill; the drill bit friction coefficient is obtained according to the surface torque, surface drilling pressure, drill bit diameter, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill; the drill bit cutting depth is obtained according to the mechanical drilling speed, drill bit speed, power drill speed displacement ratio and drilling fluid displacement flowing through the power drill; the drill bit wear coefficient is obtained according to the surface drilling pressure and drill bit cutting depth.

[0235] In an optional implementation, the change rate determination module 601 is used to:

[0236] Determine the last data sampling point as the corresponding first target sampling point, and determine the last data sampling point among the other data sampling points except the first target sampling point as the corresponding second target sampling point;

[0237] The state change rate parameter is obtained according to the first working state parameter corresponding to the first target sampling point and the second working state parameter corresponding to the second target sampling point, wherein the state change rate parameter includes the mechanical specific energy change rate, the friction coefficient change rate, the cutting depth change rate and the wear coefficient change rate.

[0238] In an optional implementation, the change rate determination module 601 is used to:

[0239] Obtaining the mechanical specific energy change rate according to a first drill bit mechanical specific energy corresponding to the first working state parameter and a second drill bit mechanical specific energy corresponding to the second working state parameter;

[0240] Obtaining the friction coefficient change rate according to a first drill bit friction coefficient corresponding to the first working state parameter and a second drill bit friction coefficient corresponding to the second working state parameter;

[0241] Obtaining the cutting depth change rate according to a first drill bit cutting depth corresponding to the first working state parameter and a second drill bit cutting depth corresponding to the second working state parameter;

[0242] The wear coefficient change rate is obtained according to the first drill bit wear coefficient corresponding to the first working state parameter and the second drill bit wear coefficient corresponding to the second working state parameter.

[0243] In an optional embodiment, the method further includes a real drilling pressure drop determination module, which is used to:

[0244] Before obtaining the corresponding working state parameters according to the engineering parameters of the preset data sampling points of the target drill bit,

[0245] The actual drilling pressure drop of the power drilling tool is obtained by subtracting the second riser pressure when the target drill bit is lifted from the corresponding bottom of the well to a preset drilling depth from the first riser pressure when the target drill bit is drilling normally.

[0246] In an optional implementation, the input determination module 602 is used to:

[0247] The detection input parameters are formed according to the drilling footage, pure drilling time, footage time, mechanical drilling speed, drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth, drill bit wear coefficient, mechanical specific energy change rate, friction coefficient change rate, cutting depth change rate and wear coefficient change rate of the target drill bit, wherein the engineering parameters include the drilling footage, pure drilling time, footage time and mechanical drilling speed of the target drill bit, the working state parameters include the drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth and drill bit wear coefficient of the target drill bit, and the state change rate parameters include the mechanical specific energy change rate, friction coefficient change rate, cutting depth change rate and wear coefficient change rate of the target drill bit.

[0248] In an optional embodiment, the method further includes a model training module for:

[0249] Before obtaining the wear type of the target drill bit according to the detection input parameters and the preset trained decision tree model,

[0250] According to the historical working state parameters of the preset historical sampling points of the plurality of historical drill bits, the historical state change rate parameters of the corresponding historical drill bits are obtained;

[0251] Forming an input sample according to the historical engineering parameters corresponding to the historical sampling points of the historical drill bit, the historical working state parameters and the historical state change rate parameters;

[0252] Taking the historical wear type corresponding to the historical drill bit as the corresponding output sample, and forming a corresponding sample to be selected according to the input sample corresponding to the historical drill bit and the corresponding output sample;

[0253] According to a preset sample ratio, a corresponding plurality of training samples and a plurality of test samples are determined from a plurality of samples to be selected, and a preset untrained decision tree model is trained using the plurality of training samples and test samples to obtain a trained decision tree model.

[0254] In an optional embodiment, the system further includes a historical working state parameter determination module, which is used to:

[0255] Before obtaining the historical state change rate parameters of the corresponding historical drill bits according to the historical working state parameters of the preset historical sampling points of the plurality of historical drill bits,

[0256] According to the historical engineering parameters of preset historical sampling points of multiple historical drill bits, corresponding historical working status parameters are obtained, wherein the historical engineering parameters include the historical ground drilling pressure, historical ground torque, historical mechanical drilling speed, historical drill bit diameter and historical drill bit speed of the historical drill bit, as well as the historical power drill speed displacement ratio of the power drill, the historical drilling fluid displacement flowing through the power drill, the historical maximum output torque of the power drill, the historical maximum pressure drop of the power drill and the historical actual drilling pressure drop of the power drill, and the historical working status parameters include the historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth and historical drill bit wear coefficient of the historical drill bit.

[0257] In an optional implementation, the historical working status parameter determination module is used to:

[0258] Determining whether the historical drill bit is matched with a powered drill tool;

[0259] If not, the historical drill bit mechanical specific energy is obtained according to the historical ground drilling pressure, historical ground torque, historical mechanical drilling speed, historical drill bit diameter and historical drill bit speed; the historical drill bit friction coefficient is obtained according to the historical ground torque, historical ground drilling pressure and historical drill bit diameter; the historical drill bit cutting depth is obtained according to the historical mechanical drilling speed and historical drill bit speed; the historical drill bit wear coefficient is obtained according to the historical ground drilling pressure and historical drill bit cutting depth;

[0260] If so, the historical drill bit mechanical specific energy is obtained based on the historical surface drilling pressure, historical surface torque, historical mechanical drilling speed, historical drill bit diameter, historical drill bit speed, historical power drill speed displacement ratio, historical drilling fluid displacement through the power drill, historical power drill maximum output torque, historical power drill maximum pressure drop and historical power drill actual drilling pressure drop; the historical drill bit friction coefficient is obtained based on the historical surface torque, historical surface drilling pressure, historical drill bit diameter, historical power drill maximum output torque, historical power drill maximum pressure drop and historical power drill actual drilling pressure drop; the historical drill bit cutting depth is obtained based on the historical mechanical drilling speed, historical drill bit speed, historical power drill speed displacement ratio and historical drilling fluid displacement through the power drill; the historical drill bit wear coefficient is obtained based on the historical surface drilling pressure and historical drill bit cutting depth.

[0261] In an optional embodiment, the model training module is used to:

[0262] Determine the last historical sampling point as the corresponding third target sampling point, and determine the last historical sampling point among the other historical sampling points except the third target sampling point as the corresponding fourth target sampling point;

[0263] The historical state change rate parameter is obtained according to the first historical working state parameter corresponding to the third target sampling point and the second historical working state parameter corresponding to the fourth target sampling point, wherein the historical state change rate parameter includes the historical mechanical specific energy change rate, the historical friction coefficient change rate, the historical cutting depth change rate and the historical wear coefficient change rate.

[0264] In an optional embodiment, the model training module is used to:

[0265] The input sample corresponding to the historical drill bit is formed according to the historical drilling footage, historical pure drilling time, historical footage time, historical mechanical drilling speed, historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth, historical drill bit wear coefficient, historical mechanical specific energy change rate, historical friction coefficient change rate, historical cutting depth change rate and historical wear coefficient change rate of the historical drill bit, wherein the historical engineering parameters include the historical drilling footage, historical pure drilling time, historical footage time and historical mechanical drilling speed of the historical drill bit, the historical working state parameters include the historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth and historical drill bit wear coefficient of the historical drill bit, and the historical state change rate parameters include the historical mechanical specific energy change rate, historical friction coefficient change rate, historical cutting depth change rate and historical wear coefficient change rate of the historical drill bit.

[0266] In an optional embodiment, the system further includes a historical wear type marking module, which is used to:

[0267] Before using the historical wear type corresponding to the historical drill bit as the corresponding output sample,

[0268] According to a preset drill bit wear classification standard, determining the starting drilling reasons of the plurality of historical drill bits, and determining the historical drill bit corresponding to the starting drilling reason associated with the drill bit wear condition as the selected drill bit;

[0269] Determining wear status levels corresponding to the plurality of selected drill bits according to the drill bit wear grading standard;

[0270] Based on the wear status levels of the plurality of selected drill bits, historical wear types corresponding to the plurality of historical drill bits are determined, wherein the historical wear types are significant wear or insignificant wear.

[0271] In an optional embodiment, the historical wear type marking module is used to:

[0272] Based on the wear state levels of the plurality of selected drill bits, determining the number of selected drill bits having a wear state level higher than or equal to each standard state level preset in the drill bit wear grading standard;

[0273] According to the number of selected drill bits corresponding to each standard status level and the total number of all selected drill bits, the proportion of the number of drill bits corresponding to each standard status level is obtained;

[0274] Determine the highest standard state level among the standard state levels in which the number of drill bits accounts for a proportion greater than or equal to a preset proportion threshold as a critical wear amount level;

[0275] Determining, according to the drill bit wear grading standard, wear status grades corresponding to other historical drill bits among the historical drill bits except the selected drill bit;

[0276] The historical wear type of the historical drill bit having a wear state level higher than or equal to the critical wear amount level is determined as significantly worn, and the historical wear type of the historical drill bit having a wear state level lower than the critical wear amount level is determined as not significantly worn.

[0277] Since the principle of solving the problem by the drill wear type detection device 600 is similar to the above method, the implementation of the drill wear type detection device 600 can refer to the implementation of the above method, which will not be repeated here.

[0278] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer device, and specifically, the computer device may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0279] In a typical example, a computer device specifically includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the method described above is implemented when the processor executes the program.

[0280] Reference below Figure 7 , which shows a schematic diagram of the structure of a computer device 700 suitable for implementing an embodiment of the present application.

[0281] like Figure 7As shown, the computer device 700 includes a central processing unit (CPU) 701, which can perform various appropriate operations and processes according to a program stored in a read-only memory (ROM) 702 or a program loaded from a storage part 708 into a random access memory (RAM) 703. In the RAM 703, various programs and data required for the operation of the system 700 are also stored. The CPU 701, the ROM 702, and the RAM 703 are connected to each other via a bus 704. An input / output (I / O) interface 705 is also connected to the bus 704.

[0282] The following components are connected to the I / O interface 705: an input section 706 including a keyboard, a mouse, etc.; an output section 707 including a cathode ray tube (CRT), a liquid crystal feedback device (LCD), etc., and a speaker, etc.; a storage section 708 including a hard disk, etc.; and a communication section 709 including a network interface card such as a LAN card, a modem, etc. The communication section 709 performs communication processing via a network such as the Internet. A drive 710 is also connected to the I / O interface 705 as needed. A removable medium 711, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 710 as needed, so that a computer program read therefrom is installed as needed as the storage section 708.

[0283] In particular, according to an embodiment of the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program tangibly contained on a machine-readable medium, and the computer program includes program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through the communication part 709, and / or installed from the removable medium 711.

[0284] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0285] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0286] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0287] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0288] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0289] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0290] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0291] The present application may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0292] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0293] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method for detecting drill bit wear type, characterized in that: include: According to the working state parameters of the preset data sampling points of the target drill bit, the corresponding state change rate parameters are obtained; Forming detection input parameters according to the engineering parameters of the data sampling points of the target drill bit, the working state parameters and the state change rate parameters; Obtaining the wear type of the target drill bit according to the detection input parameters and a preset trained decision tree model; The method of obtaining the corresponding state change rate parameter according to the working state parameter of the preset data sampling point of the target drill bit includes: determining the last data sampling point as the corresponding first target sampling point, and determining the last data sampling point among the other data sampling points except the first target sampling point as the corresponding second target sampling point; The state change rate parameter is obtained according to the first working state parameter corresponding to the first target sampling point and the second working state parameter corresponding to the second target sampling point, The trained decision tree model is obtained by training and testing by using input samples formed by multiple historical drill bits and historical wear types corresponding to the historical drill bits as corresponding output samples; The output sample determines the reasons for starting drilling of multiple historical drill bits according to a preset drill bit wear grading standard, and determines the historical drill bit corresponding to the reasons for starting drilling associated with the drill bit wear as the selected drill bit; determines the wear status levels corresponding to the multiple selected drill bits according to the drill bit wear grading standard; determines the number of selected drill bits whose wear status levels are higher than or equal to each standard status level preset in the drill bit wear grading standard based on the wear status levels of the multiple selected drill bits; obtains the proportion of the number of drill bits corresponding to each standard status level according to the number of selected drill bits corresponding to each standard status level and the total number of all selected drill bits; determines the highest standard status level among the standard status levels whose drill bit number proportion is greater than or equal to the preset proportion threshold as the critical wear amount level; determines the wear status levels corresponding to other historical drill bits in the historical drill bits except the selected drill bit according to the drill bit wear grading standard; determines the historical wear type of the historical drill bit whose wear status level is higher than or equal to the critical wear amount level as significant wear, and determines the historical wear type of the historical drill bit whose wear status level is lower than the critical wear amount level as insignificant wear.

2. The method according to claim 1, characterized in that Further including: Before obtaining the corresponding state change rate parameter according to the working state parameter of the preset data sampling point of the target drill bit, According to the engineering parameters of the preset data sampling points of the target drill bit, the corresponding working state parameters are obtained, wherein the engineering parameters include the ground drilling pressure, ground torque, mechanical drilling speed, drill bit diameter and drill bit speed of the target drill bit, and the power drill speed displacement ratio of the power drill, the drilling fluid displacement flowing through the power drill, the maximum output torque of the power drill, the maximum pressure drop of the power drill and the actual drilling pressure drop of the power drill; the working state parameters include the drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth and drill bit wear coefficient of the target drill bit.

3. The method according to claim 2, characterized in that The method of obtaining corresponding working state parameters according to the engineering parameters of the preset data sampling points of the target drill bit includes: Determining whether the target drill bit is matched with a powered drill tool; If not, the drill bit mechanical specific energy is obtained according to the surface drilling pressure, surface torque, mechanical drilling speed, drill bit diameter and drill bit speed; the drill bit friction coefficient is obtained according to the surface torque, surface drilling pressure and drill bit diameter; the drill bit cutting depth is obtained according to the mechanical drilling speed and drill bit speed; the drill bit wear coefficient is obtained according to the surface drilling pressure and drill bit cutting depth; If so, the mechanical specific energy of the drill bit is obtained according to the surface drilling pressure, surface torque, mechanical drilling speed, drill bit diameter, drill bit speed, power drill speed displacement ratio, drilling fluid displacement flowing through the power drill, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill; the drill bit friction coefficient is obtained according to the surface torque, surface drilling pressure, drill bit diameter, maximum output torque of the power drill, maximum pressure drop of the power drill and actual drilling pressure drop of the power drill; the drill bit cutting depth is obtained according to the mechanical drilling speed, drill bit speed, power drill speed displacement ratio and drilling fluid displacement flowing through the power drill; the drill bit wear coefficient is obtained according to the surface drilling pressure and drill bit cutting depth.

4. The method according to claim 2, characterized in that: The working state parameters of the preset data sampling points of the target drill bit are used to obtain the corresponding state change rate parameters. include: The state change rate parameters include the mechanical specific energy change rate, the friction coefficient change rate, the cutting depth change rate and the wear coefficient change rate.

5. The method according to claim 1, characterized in that The obtaining the state change rate parameter according to the first working state parameter corresponding to the first target sampling point and the second working state parameter corresponding to the second target sampling point includes: Obtaining a mechanical specific energy change rate according to a first drill bit mechanical specific energy corresponding to the first working state parameter and a second drill bit mechanical specific energy corresponding to the second working state parameter; Obtaining a friction coefficient change rate according to a first drill bit friction coefficient corresponding to the first working state parameter and a second drill bit friction coefficient corresponding to the second working state parameter; Obtaining a cutting depth change rate according to a first drill bit cutting depth corresponding to the first working state parameter and a second drill bit cutting depth corresponding to the second working state parameter; The wear coefficient change rate is obtained according to the first drill bit wear coefficient corresponding to the first working state parameter and the second drill bit wear coefficient corresponding to the second working state parameter.

6. The method according to claim 2, characterized in that Further including: Before obtaining the corresponding working state parameters according to the engineering parameters of the preset data sampling points of the target drill bit, The actual drilling pressure drop of the power drilling tool is obtained by subtracting the second riser pressure when the target drill bit is lifted from the corresponding bottom of the well to a preset drilling depth from the first riser pressure when the target drill bit is drilling normally.

7. The method according to claim 1, characterized in that The forming of detection input parameters according to the engineering parameters of the data sampling points of the target drill bit, the working state parameters and the state change rate parameters comprises: The detection input parameters are formed according to the drilling footage, pure drilling time, footage time, mechanical drilling speed, drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth, drill bit wear coefficient, mechanical specific energy change rate, friction coefficient change rate, cutting depth change rate and wear coefficient change rate of the target drill bit, wherein the engineering parameters include the drilling footage, pure drilling time, footage time and mechanical drilling speed of the target drill bit, the working state parameters include the drill bit mechanical specific energy, drill bit friction coefficient, drill bit cutting depth and drill bit wear coefficient of the target drill bit, and the state change rate parameters include the mechanical specific energy change rate, friction coefficient change rate, cutting depth change rate and wear coefficient change rate of the target drill bit.

8. The method according to claim 1, characterized in that Further including: Before obtaining the wear type of the target drill bit according to the detection input parameters and the preset trained decision tree model, According to the historical working state parameters of the preset historical sampling points of the plurality of historical drill bits, the historical state change rate parameters of the corresponding historical drill bits are obtained; Forming an input sample according to the historical engineering parameters corresponding to the historical sampling points of the historical drill bit, the historical working state parameters and the historical state change rate parameters; Taking the historical wear type corresponding to the historical drill bit as the corresponding output sample, and forming a corresponding sample to be selected according to the input sample corresponding to the historical drill bit and the corresponding output sample; According to a preset sample ratio, a corresponding plurality of training samples and a plurality of test samples are determined from a plurality of samples to be selected, and a preset untrained decision tree model is trained using the plurality of training samples and test samples to obtain a trained decision tree model.

9. The method according to claim 8, characterized in that Further including: Before obtaining the historical state change rate parameters of the corresponding historical drill bits according to the historical working state parameters of the preset historical sampling points of the plurality of historical drill bits, According to the historical engineering parameters of preset historical sampling points of multiple historical drill bits, corresponding historical working status parameters are obtained, wherein the historical engineering parameters include the historical ground drilling pressure, historical ground torque, historical mechanical drilling speed, historical drill bit diameter and historical drill bit speed of the historical drill bit, as well as the historical power drill speed displacement ratio of the power drill, the historical drilling fluid displacement flowing through the power drill, the historical maximum output torque of the power drill, the historical maximum pressure drop of the power drill and the historical actual drilling pressure drop of the power drill, and the historical working status parameters include the historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth and historical drill bit wear coefficient of the historical drill bit.

10. The method according to claim 9, characterized in that The method of obtaining corresponding historical working state parameters according to historical engineering parameters of preset historical sampling points of multiple historical drill bits includes: Determining whether the historical drill bit is matched with a powered drill tool; If not, the historical drill bit mechanical specific energy is obtained according to the historical ground drilling pressure, historical ground torque, historical mechanical drilling speed, historical drill bit diameter and historical drill bit speed; the historical drill bit friction coefficient is obtained according to the historical ground torque, historical ground drilling pressure and historical drill bit diameter; the historical drill bit cutting depth is obtained according to the historical mechanical drilling speed and historical drill bit speed; the historical drill bit wear coefficient is obtained according to the historical ground drilling pressure and historical drill bit cutting depth; If so, the historical drill bit mechanical specific energy is obtained based on the historical surface drilling pressure, historical surface torque, historical mechanical drilling speed, historical drill bit diameter, historical drill bit speed, historical power drill speed displacement ratio, historical drilling fluid displacement through the power drill, historical power drill maximum output torque, historical power drill maximum pressure drop and historical power drill actual drilling pressure drop; the historical drill bit friction coefficient is obtained based on the historical surface torque, historical surface drilling pressure, historical drill bit diameter, historical power drill maximum output torque, historical power drill maximum pressure drop and historical power drill actual drilling pressure drop; the historical drill bit cutting depth is obtained based on the historical mechanical drilling speed, historical drill bit speed, historical power drill speed displacement ratio and historical drilling fluid displacement through the power drill; the historical drill bit wear coefficient is obtained based on the historical surface drilling pressure and historical drill bit cutting depth.

11. The method according to claim 9, characterized in that The method of obtaining the historical state change rate parameter of the corresponding historical drill bit according to the historical working state parameters of the preset historical sampling points of the multiple historical drill bits includes: Determine the last historical sampling point as the corresponding third target sampling point, and determine the last historical sampling point among the other historical sampling points except the third target sampling point as the corresponding fourth target sampling point; The historical state change rate parameter is obtained according to the first historical working state parameter corresponding to the third target sampling point and the second historical working state parameter corresponding to the fourth target sampling point, wherein the historical state change rate parameter includes the historical mechanical specific energy change rate, the historical friction coefficient change rate, the historical cutting depth change rate and the historical wear coefficient change rate.

12. The method according to claim 8, characterized in that The forming of input samples according to the historical engineering parameters corresponding to the historical sampling points of the historical drill bit, the historical working state parameters and the historical state change rate parameters comprises: The input sample corresponding to the historical drill bit is formed according to the historical drilling footage, historical pure drilling time, historical footage time, historical mechanical drilling speed, historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth, historical drill bit wear coefficient, historical mechanical specific energy change rate, historical friction coefficient change rate, historical cutting depth change rate and historical wear coefficient change rate of the historical drill bit, wherein the historical engineering parameters include the historical drilling footage, historical pure drilling time, historical footage time and historical mechanical drilling speed of the historical drill bit, the historical working state parameters include the historical drill bit mechanical specific energy, historical drill bit friction coefficient, historical drill bit cutting depth and historical drill bit wear coefficient of the historical drill bit, and the historical state change rate parameters include the historical mechanical specific energy change rate, historical friction coefficient change rate, historical cutting depth change rate and historical wear coefficient change rate of the historical drill bit.

13. A drill bit wear type detection device, characterized in that: include: A change rate determination module, used to obtain corresponding state change rate parameters according to the working state parameters of the preset data sampling points of the target drill bit; An input determination module, used to form a detection input parameter according to the engineering parameter of the data sampling point of the target drill bit, the working state parameter and the state change rate parameter; A type detection module, used to obtain the wear type of the target drill bit according to the detection input parameters and a preset trained decision tree model; The change rate determination module is further used to determine the last data sampling point as the corresponding first target sampling point, and determine the last data sampling point among the other data sampling points except the first target sampling point as the corresponding second target sampling point; Obtaining the state change rate parameter according to a first working state parameter corresponding to the first target sampling point and a second working state parameter corresponding to the second target sampling point; A model training module, used to obtain the trained decision tree model by taking input samples formed by a plurality of historical drill bits and the historical wear types corresponding to the historical drill bits as corresponding output samples before obtaining the wear type of the target drill bit according to the detection input parameters and the preset trained decision tree model; The historical wear type marking module is used to determine the reasons for starting drilling of multiple historical drill bits according to a preset drill wear grading standard before using the historical wear type corresponding to the historical drill bit as the corresponding output sample, and determine the historical drill bit corresponding to the reason for starting drilling of the associated drill bit wear condition as the selected drill bit; determine the wear state level corresponding to the multiple selected drill bits according to the drill wear grading standard; and determine the number of selected drill bits whose wear state level is higher than or equal to each standard state level preset in the drill wear grading standard based on the wear state levels of the multiple selected drill bits; and determine the number of selected drill bits whose wear state level is higher than or equal to each standard state level preset in the drill wear grading standard according to each standard state level. The number of selected drill bits and the total number of all selected drill bits are calculated to obtain the proportion of drill bit numbers corresponding to each standard state level; the highest standard state level among the standard state levels whose proportion of drill bit numbers is greater than or equal to a preset proportion threshold is determined as the critical wear level; according to the drill bit wear grading standard, the wear state levels corresponding to other historical drill bits except the selected drill bits in the historical drill bits are determined; the historical wear type of the historical drill bits whose wear state level is higher than or equal to the critical wear level is determined as significant wear, and the historical wear type of the historical drill bits whose wear state level is lower than the critical wear level is determined as non-significant wear.

14. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the method according to any one of claims 1 to 12 is implemented.

15. A computer readable medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 12 is implemented.

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