Abrasion evaluation method, device and equipment for PDC (polycrystalline diamond compact) bit

Abstract

The embodiment of the invention provides a PDC drill bit abrasion evaluation method, device and equipment, and the method comprises the steps that real-time logging data of a PDC drill bit are obtained, and the real-time logging data comprise the drill bit rotating speed, the mechanical drilling speed and the drilling pressure; determining abrasion indexes of the PDC drill bit according to the drill bit rotating speed, the mechanical drilling speed and the drilling pressure; and determining the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit. Based on the real-time logging data, real-time quantitative evaluation of the abrasion degree of the PDC drill bit is achieved, a scientific basis is provided for drill bit parameter adjustment and drill bit replacement, then the drilling cost can be reduced, and the drilling period can be shortened.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of drilling engineering construction in oil exploration and development, and specifically to a polycrystalline diamond compact (PDC) drill bit wear assessment method, device and equipment. Background Art

[0002] PDC drill bits are currently the most commonly used drill bits in the drilling process, and they have obvious effects on increasing speed, efficiency and drilling in hard formations. However, the result of strengthening drilling parameters (high drilling pressure, high speed) is often severe wear of the drill bit, which causes the drill bit to be scrapped before reaching sufficient footage. Therefore, the assessment of PDC drill bit wear is crucial for drilling construction.

[0003] At present, there have been many studies on the wear assessment and drilling efficiency assessment of PDC drill bits. For example, Liu Xiaoao's "Research on PDC Drill Bit Wear Model" studied the wear mechanism of PDC cutters based on the failure form of PDC cutters, and analyzed the influencing factors of PDC cutter wear speed based on the force model of cutters and the principle of friction and wear. Although the wear effect of PDC drill bits can be simulated through physical experiments and finite element simulations, the wear of PDC drill bits cannot be monitored in real time; Hao Yalong, Ge Yunhua et al.'s "New Method for Monitoring Cutter Wear of PDC Drill Bits Based on Drilling Speed ​​Mode" optimized the drilling speed equation suitable for PDC drill bits in order to conduct real-time quantitative monitoring of the wear degree of PDC drill bit cutters. By analyzing the relationship between the cutting trajectory length of the cutter teeth, the wear volume of the cutter teeth and the mechanical drilling speed, an iterative model of the relative wear coefficient was established, and a new method for monitoring the wear of PDC drill bit cutters while drilling was proposed. Although this method can accurately detect the wear degree of PDC drill bit cutters, the entire method requires more parameters and involves geological and logging data, making it difficult to achieve real-time evaluation. Summary of the invention

[0004] The embodiments of the present invention provide a PDC drill bit wear assessment method, device and equipment, which are used to solve the problem that the existing methods are difficult to perform real-time assessment of drill bit wear.

[0005] In a first aspect, an embodiment of the present invention provides a PDC drill bit wear assessment method, comprising:

[0006] Obtain real-time logging data of PDC drill bits, including drill bit speed, mechanical drilling speed and drilling pressure;

[0007] Determine the wear index of the PDC drill bit based on the drill bit speed, mechanical drilling speed and drilling pressure;

[0008] The current wear degree of the PDC drill bit is determined according to the wear index of the PDC drill bit.

[0009] In one embodiment, the wear index of the PDC drill bit is determined according to the drill bit rotation speed, mechanical drilling speed and drilling pressure, including:

[0010] The wear index of the PDC drill bit is determined according to the following expression:

[0011]

[0012] Among them, bWM represents wear index, RPM represents drill bit speed, ROP represents mechanical drilling speed, and WOB represents bit pressure.

[0013] In one embodiment, the method further comprises:

[0014] Get the maximum torque, minimum torque and average torque of the PDC drill bit;

[0015] Determine the stick-slip vibration index of the PDC drill bit based on the maximum torque, minimum torque and average torque;

[0016] Determine the current wear degree of the PDC drill bit based on the wear index of the PDC drill bit, including:

[0017] The current wear degree of the PDC drill bit is determined based on the wear index and stick-slip vibration index of the PDC drill bit.

[0018] In one embodiment, determining the stick-slip vibration index of the PDC drill bit according to the maximum torque, the minimum torque and the average torque includes:

[0019] The stick-slip vibration index of the PDC drill bit is determined according to the following expression:

[0020]

[0021] Among them, T MAx Indicates the maximum torque, T min Indicates the minimum torque, T ave represents the average torque and S represents the stick-slip vibration index.

[0022] In one embodiment, determining the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit includes:

[0023] The current wear degree of the PDC drill bit is determined based on the wear index and axial vibration index of the PDC drill bit.

[0024] In one embodiment, the method further comprises:

[0025] Obtain and display the corresponding relationship between the PDC bit's drilling pressure, rotation speed, drilling speed, wear index, stick-slip vibration index, axial vibration index and mechanical specific energy and drilling depth.

[0026] In one embodiment, the method further comprises:

[0027] Get and display the drill bit type and drill bit model of the PDC drill bit.

[0028] In a second aspect, an embodiment of the present invention provides a PDC drill bit wear assessment device, comprising:

[0029] An acquisition module is used to acquire real-time logging data of the PDC drill bit, including drill bit speed, mechanical drilling speed and drilling pressure;

[0030] A processing module, for determining a wear index of a PDC drill bit according to a drill bit rotation speed, a mechanical drilling speed, and a drilling pressure;

[0031] The evaluation module is used to determine the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit.

[0032] In a third aspect, an embodiment of the present invention provides an electronic device, including:

[0033] at least one processor and memory;

[0034] Memory stores computer-executable instructions;

[0035] At least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the PDC drill bit wear assessment method as described in any one of the first aspects.

[0036] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer execution instructions, and when the computer execution instructions are executed by a processor, they are used to implement the PDC drill bit wear assessment method as described in any one of the first aspects.

[0037] The PDC drill bit wear assessment method, device and equipment provided by the embodiment of the present invention obtains the real-time logging data of the PDC drill bit, which includes the drill bit speed, mechanical drilling speed and drilling pressure; determines the wear index of the PDC drill bit according to the drill bit speed, mechanical drilling speed and drilling pressure; and determines the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit. Based on the real-time logging data, a real-time quantitative assessment of the wear degree of the PDC drill bit is realized, which provides a scientific basis for adjusting the drill bit parameters and replacing the drill bit, thereby reducing the drilling cost and shortening the drilling cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0039] Figure 1A flow chart of a PDC drill bit wear assessment method provided by one embodiment of the present invention;

[0040] Figure 2 A schematic structural diagram of a PDC drill bit wear assessment device provided by an embodiment of the present invention;

[0041] Figure 3 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0042] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0044] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0045] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0046] There are many studies on the wear assessment and drilling efficiency assessment methods of PDC drill bits. However, most of the currently published PDC drill bit wear assessment methods are basically divided into two types. One is based on manual analysis based on logging curves combined with expert experience, which cannot be quantitatively achieved; the other is based on finite element simulation or the establishment of complex data models, which is difficult to achieve online real-time evaluation. For example, Liu Xiaoao's "Study on PDC Drill Bit Wear Model" studied the wear mechanism of PDC cutters based on the failure form of PDC cutters, and analyzed the factors affecting the wear rate of PDC cutters based on the force model and friction wear principle of the cutters. The main method is to simulate the wear effect of PDC drill bits through physical experiments and finite elements, and no real-time evaluation method has been established. Liu Xianyu, He Lian and others' "PDC Drill Bit Status Judgment Technology during Drilling" uses PDC drill bit examples in the western South China Sea to explore how to timely judge and identify the PDC drill bit status based on comprehensive logging parameters during the use of PDC drill bits to ensure that PDC drill bits can drill efficiently. The whole idea is to judge the wear of drill bit by analyzing drilling pressure, torque and mechanical drilling speed, combined with expert experience, which has a large error compared with the actual situation. In order to carry out real-time quantitative monitoring of the wear degree of PDC drill bit cutting teeth, Hao Yalong, Ge Yunhua and others' "New Method for Monitoring Wear of PDC Drill Bit Cutters Based on Drilling Speed ​​Mode" optimized the drilling speed equation suitable for PDC drill bits, and established an iterative model of relative wear coefficient by analyzing the relationship between the cutting track length of the cutting teeth, the wear volume of the cutting teeth and the mechanical drilling speed, and proposed a new method for monitoring wear of PDC drill bit cutting teeth while drilling. Based on the logging data of wells drilled with PDC drill bits in Yumen Oilfield, Qinghai Oilfield and Southwest Oil and Gas Field, the model was verified. The relative wear coefficient calculated by this method is close to the drill bit wear data measured after drilling, and the average relative error between the calculated value and the measured value is 11.60%; this method can accurately detect the wear degree of PDC drill bit cutting teeth, providing a basis for timely adjustment of drilling parameters, early warning of complex geological conditions and replacement of drill bits. However, the whole method requires many parameters, involving geological and logging data, and it is difficult to achieve real-time evaluation. In order to solve the above problems existing in the prior art, this application analyzes the wear mechanism of PDC drill bits, constructs PDC drill bit wear indicators, and establishes a real-time evaluation method for PDC drill bit wear based on real-time logging data, which provides a scientific basis for adjusting drilling parameters and the timing of replacing drill bits. The application will be described in detail below through specific embodiments.

[0047] Figure 1 Flow chart of a PDC drill bit wear assessment method provided by one embodiment of the present invention. Figure 1 As shown, the PDC drill bit wear assessment method provided in this embodiment may include:

[0048] S101, obtaining real-time logging data of a PDC drill bit, where the real-time logging data includes drill bit rotation speed, mechanical drilling speed, and drilling pressure.

[0049] In this embodiment, when a PDC drill bit is used for drilling, data measured by a logging instrument during the drilling process is obtained in real time, that is, real-time logging data of the PDC drill bit is obtained. The real-time logging data in this embodiment may include, for example, drill bit speed, mechanical drilling speed, drilling pressure, torque, displacement, pool volume, hook height, riser pressure, inlet flow, viscosity, hook load, outlet flow, total pool volume, etc. It is understandable that in order to facilitate users to view real-time logging data, the real-time logging data of the PDC drill bit can also be displayed on the screen in real time, and the display method includes but is not limited to numerical values, curves, diagrams, etc.

[0050] S102, determining the wear index of the PDC drill bit according to the drill bit rotation speed, mechanical drilling speed and drilling pressure.

[0051] Ignoring the temperature effect, the main controlling factors of PDC drill bit wear include sliding distance, rock strength, rock abrasiveness, etc. It should be noted that the wear of the PCD drill bit in this application is a function of the sliding distance (the distance the cutting tooth moves), rather than the load on a single cutting tooth. The load on each cutting tooth is highest in the cone, but most of the load is used to cut the formation, not the wear surface. The greatest wear usually occurs on the shoulder where the sliding distance per revolution is higher and the load is lower. Rock strength and abrasiveness are uncontrollable factors and are determined by the geological conditions in which the drill bit is located.

[0052] Based on this, the present application establishes a PDC drill bit wear evaluation index. Specifically, in an optional implementation, the wear index of the PDC drill bit is determined according to the drill bit rotation speed, mechanical drilling speed and drilling pressure, including:

[0053] The wear index of the PDC drill bit is determined according to the following expression:

[0054]

[0055] Wherein, bWM represents the wear index in r·kN / m, RPM represents the drill bit speed in r / min, ROP represents the mechanical drilling speed in m / h, and WOB represents the bit pressure in kN.

[0056] The "bit wear indicator" in this application can also be used as an indicator to track deviations from the baseline. Like mechanical specific energy (MSE), this indicator is also sensitive to changes in ROP, which may be related to the formation and not to PDC bit wear. As the sliding distance increases, the wear rate also increases. In hard, abrasive formations, this may be due to smooth wear caused by abrasion or an early damage event. An increase in bWM values ​​indicates that the drill bit has been damaged and continues to wear / degrade with increasing loads, travel distance, or thermal degradation. In addition, changes in formation properties or drill bit dysfunction can also affect ROP, which may cause changes in bWM values ​​in the absence of drill bit wear / damage. Although formation strength varies with measurement depth, in this application, it is assumed that the same formation is entered throughout the drilling of the lateral section.

[0057] S103, determining the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit.

[0058] In this embodiment, the current wear degree of the PDC drill bit can be determined according to the wear index of the PDC drill bit. The larger the value of the wear index, the more serious the wear of the drill bit, that is, the current wear degree of the PDC drill bit is positively correlated with the wear index. PDC drill bit tooth wear is generally divided into 5 situations, including smooth wear, positive fracture, tangential fracture, high temperature damage and corrosion. Optionally, a correspondence between the wear index and the 5 situations of PDC drill bit tooth wear can be established in advance, and then the current wear degree can be determined according to the wear index of the PDC drill bit.

[0059] The PDC drill bit wear assessment method provided in this embodiment obtains the real-time logging data of the PDC drill bit, which includes the drill bit speed, mechanical drilling speed and drilling pressure; determines the wear index of the PDC drill bit according to the drill bit speed, mechanical drilling speed and drilling pressure; and determines the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit. Based on the real-time logging data, a real-time quantitative assessment of the wear degree of the PDC drill bit is achieved, which provides a scientific basis for adjusting the drill bit parameters and replacing the drill bit, thereby reducing the drilling cost and shortening the drilling cycle.

[0060] On the basis of the above embodiments, in order to further improve the accuracy of PDC drill bit wear assessment, this embodiment further determines the current wear degree of the PDC drill bit by establishing a stick-slip vibration index and combining the wear index with the stick-slip vibration index. It is understandable that if a drill bit abnormality occurs in the current well, such as stick-slip (the bit bite will become very aggressive, causing the drill bit to be "stuck" and stop drilling. At the same time, the drill rod behind the drill bit will continue to tighten like a spring until the drill bit falls off or "slips off", and then the drill rod will begin to rotate uncontrollably), motor failure and drill bit vortex, etc., it is necessary to evaluate the wear degree of the PDC drill bit according to the abnormal situation. Among them, stick-slip is the most important drill bit abnormality. In this embodiment, stick-slip is quantified by establishing a stick-slip vibration index. In an optional implementation, the maximum torque, minimum torque and average torque of the PDC drill bit can be obtained; then the stick-slip vibration index of the PDC drill bit can be determined according to the maximum torque, minimum torque and average torque. Determining the stick-slip vibration index of the PDC drill bit according to the maximum torque, minimum torque and average torque can specifically include:

[0061] The stick-slip vibration index of the PDC drill bit is determined according to the following expression:

[0062]

[0063] Among them, T max Indicates the maximum torque, T min Indicates the minimum torque, T ave represents the average torque and S represents the stick-slip vibration index.

[0064] Furthermore, the risk level corresponding to the stick-slip vibration index S can be established:

[0065] S Range Risk Level [0，1.2] Low stick-slip risk [1.2，1.7] Medium stick-slip risk >1.7 High stick-slip risk

[0066] The current wear degree of the PDC drill bit is determined according to the wear index of the PDC drill bit, which may specifically include: determining the current wear degree of the PDC drill bit according to the wear index and stick-slip vibration index of the PDC drill bit. For example, if the stick-slip vibration index S of the drill bit is at a low level, the mechanical drilling speed decreases, and the wear index increases, it means that the drill bit is seriously worn.

[0067] On the basis of the above embodiments, in order to further improve the accuracy of PDC drill bit wear assessment, this embodiment further determines the current wear degree of the PDC drill bit by obtaining the axial vibration index and combining the wear index with the axial vibration index. In an optional implementation, the current wear degree of the PDC drill bit is determined according to the wear index of the PDC drill bit, which may specifically include: determining the current wear degree of the PDC drill bit according to the wear index and axial vibration index of the PDC drill bit. For example, if the value of the drill bit wear index increases significantly, the drilling pressure is in a larger value area, the mechanical drilling speed decreases, the mechanical specific energy also increases synchronously, and the axial vibration index is too large, it means that the current high drilling pressure brings higher vibration and causes strong wear of the drill bit. At this time, the site should be guided to reduce the drilling pressure and increase the rotation speed to avoid serious damage to the PDC drill bit, resulting in invalid drilling and replacement of the drill bit. It should be noted that one or more of the wear index, mechanical specific energy, stick-slip vibration index, and axial vibration index can also be combined to evaluate the wear of the PDC drill bit.

[0068] On the basis of any of the above embodiments, in order to facilitate users to view PDC drill bit related information more intuitively, the method provided in this embodiment may also include: obtaining and displaying the corresponding relationship between the drilling pressure, rotation speed, drilling speed, wear index, stick-slip vibration index, axial vibration index and mechanical specific energy of the PDC drill bit and the drilling depth. Furthermore, the drill bit type and drill bit model of the PDC drill bit can also be obtained and displayed. By analyzing the real-time logging data and using the working condition recognition algorithm, the logging depth sequence data can be automatically generated. Specifically, the drilling pressure, rotation speed, drilling speed, wear index, stick-slip vibration index, axial vibration index and mechanical specific energy of the PDC drill bit at the current moment can be displayed in real time; the curve of the drilling pressure, rotation speed, drilling speed, wear index, stick-slip vibration index, axial vibration index and mechanical specific energy of the PDC drill bit as the drilling depth changes can also be displayed.

[0069] The following is an example of the real-time logging data of a well in a northwest oil field to illustrate the method of the present application, wherein the drill bits are Smith PDC drill bits X516 and X616. The PDC drill bit wear assessment method provided in the present application is used to conduct a real-time assessment of the PDC drill bit wear, and the drill bit wear index is calculated in real time to generate a wear assessment chart, including drilling pressure, rotation speed, torque, mechanical specific energy, wear coefficient, axial vibration index, and stick-slip vibration index. In the well section 3100-3200m, the wear coefficient of the PDC drill bit increases significantly, the drilling pressure is in the larger value area, the mechanical drilling speed decreases, the mechanical specific energy also increases synchronously, and the axial vibration index is large, indicating that the current high drilling pressure brings higher vibration and causes strong wear of the drill bit. At this time, the site should be guided to reduce the drilling pressure and increase the rotation speed to avoid serious damage to the PDC drill bit, resulting in ineffective drilling and replacement of the drill bit.

[0070] In summary, according to the relevant mechanisms of PDC drill bit wear and field experience, this application has established a method for real-time quantitative evaluation of PDC drill bit wear based on real-time logging data, and can also combine auxiliary parameters such as mechanical specific energy, stick-slip vibration index, and axial vibration index to further improve the evaluation accuracy, thereby realizing real-time evaluation of PDC drill bit wear, providing a basis for drilling parameter optimization and drill bit efficiency evaluation, thereby facilitating guidance on when to replace the drill bit and achieving increased drilling speed and efficiency.

[0071] Figure 2 The structure diagram of the PDC drill bit wear assessment device provided by one embodiment of the present invention is shown in FIG. Figure 2 As shown, the PDC drill bit wear assessment device 20 provided in this embodiment may include an acquisition module 201 , a processing module 202 and an assessment module 203 .

[0072] An acquisition module 201 is used to acquire real-time logging data of a PDC drill bit, wherein the real-time logging data includes drill bit rotation speed, mechanical drilling speed and drilling pressure;

[0073] The processing module 202 is used to determine the wear index of the PDC drill bit according to the drill bit rotation speed, mechanical drilling speed and drilling pressure;

[0074] The evaluation module 203 is used to determine the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit.

[0075] The device of this embodiment can be used to perform Figure 1 The technical solution of the method embodiment shown has similar implementation principles and technical effects, which will not be repeated here.

[0076] In an optional implementation, the processing module 202 is used to determine the wear index of the PDC drill bit according to the drill bit rotation speed, mechanical drilling speed and drilling pressure, which may specifically include:

[0077] The wear index of the PDC drill bit is determined according to the following expression:

[0078]

[0079] Among them, bWM represents wear index, RPM represents drill bit speed, ROP represents mechanical drilling speed, and WOB represents bit pressure.

[0080] In an optional embodiment, the acquisition module 201 is further used to obtain the maximum torque, minimum torque and average torque of the PDC drill bit; the processing module 202 is further used to determine the stick-slip vibration index of the PDC drill bit according to the maximum torque, minimum torque and average torque; the evaluation module 203 is used to determine the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit, which may specifically include:

[0081] The current wear degree of the PDC drill bit is determined based on the wear index and stick-slip vibration index of the PDC drill bit.

[0082] In an optional implementation, the processing module 202 is used to determine the stick-slip vibration index of the PDC drill bit according to the maximum torque, the minimum torque and the average torque, and specifically may include:

[0083] The stick-slip vibration index of the PDC drill bit is determined according to the following expression:

[0084]

[0085] Among them, T max Indicates the maximum torque, T min Indicates the minimum torque, T avE represents the average torque and S represents the stick-slip vibration index.

[0086] In an optional implementation manner, the evaluation module 203 is used to determine the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit, which may specifically include:

[0087] The current wear degree of the PDC drill bit is determined based on the wear index and axial vibration index of the PDC drill bit.

[0088] In an optional embodiment, the PDC drill bit wear assessment device 20 may also include a display module for acquiring and displaying the corresponding relationship between the drilling pressure, rotation speed, drilling speed, wear index, stick-slip vibration index, axial vibration index and mechanical specific energy of the PDC drill bit and the drilling depth.

[0089] In an optional implementation, the display module is also used to obtain and display the drill bit type and drill bit model of the PDC drill bit.

[0090] The present invention also provides an electronic device, see Figure 3 As shown, the embodiment of the present invention is only Figure 3 This is just an example for explanation, and it does not mean that the present invention is limited to this. Figure 3 This is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Figure 3 As shown, the electronic device 30 provided in this embodiment may include: a memory 301, a processor 302 and a bus 303. The bus 303 is used to realize the connection between various components.

[0091] The memory 301 stores a computer program, and when the computer program is executed by the processor 302 , the technical solution of any of the above method embodiments can be implemented.

[0092] The memory 301 and the processor 302 are directly or indirectly electrically connected to each other to achieve data transmission or interaction. For example, these elements can be electrically connected to each other through one or more communication buses or signal lines, such as through bus 303. The memory 301 stores a computer program for implementing PDC drill bit wear assessment, including at least one software function module that can be stored in the memory 301 in the form of software or firmware. The processor 302 executes various functional applications and data processing by running the software program and module stored in the memory 301.

[0093] The memory 301 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electric erasable programmable read-only memory (EEPROM), etc. The memory 301 is used to store programs, and the processor 302 executes the programs after receiving the execution instruction. Furthermore, the software programs and modules in the above-mentioned memory 301 may also include an operating system, which may include various software components and / or drivers for managing system tasks (such as memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.

[0094] The processor 302 may be an integrated circuit chip with signal processing capability. The processor 302 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc. The methods, steps, and logic diagrams disclosed in the embodiments of the present invention may be implemented or executed. The general-purpose processor may be a microprocessor or any conventional processor. It is understood that Figure 3 The structure is only for illustration and may also include Figure 3 More or fewer components as shown, or with Figure 3 Different configurations are shown. Figure 3 Each component shown in the figure may be implemented by hardware and / or software.

[0095] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. The computer program is executed by a processor to implement the technical solution of any of the above method embodiments.

[0096] The various embodiments in the present disclosure are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0097] The protection scope of the present disclosure is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the scope and spirit of the present disclosure. If these changes and modifications fall within the scope of the claims of the present disclosure and their equivalents, the intention of the present disclosure also includes these changes and modifications.

Claims

1. A PDC drill bit wear assessment method, characterized in that: include: Acquire real-time logging data of the PDC drill bit, wherein the real-time logging data includes drill bit rotation speed, mechanical drilling speed and drilling pressure; Determining a wear index of the PDC drill bit according to the drill bit rotation speed, the mechanical drilling speed and the drilling pressure; The current wear degree of the PDC drill bit is determined according to the wear index of the PDC drill bit.

2. The method according to claim 1, characterized in that Determining the wear index of the PDC drill bit according to the drill bit rotation speed, the mechanical drilling speed and the drilling pressure includes: The wear index of the PDC drill bit is determined according to the following expression: Among them, bWM represents wear index, RPM represents drill bit speed, ROP represents mechanical drilling speed, and WOB represents bit pressure.

3. The method according to claim 1, characterized in that The method further comprises: Obtaining the maximum torque, minimum torque and average torque of the PDC drill bit; Determine a stick-slip vibration index of the PDC drill bit according to the maximum torque, the minimum torque and the average torque; Determining the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit includes: The current wear degree of the PDC drill bit is determined according to the wear index and stick-slip vibration index of the PDC drill bit.

4. The method according to claim 3, characterized in that Determining the stick-slip vibration index of the PDC drill bit according to the maximum torque, the minimum torque and the average torque comprises: The stick-slip vibration index of the PDC drill bit is determined according to the following expression: Among them, T max Indicates the maximum torque, T min Indicates the minimum torque, T ave represents the average torque and S represents the stick-slip vibration index.

5. The method according to claim 1, characterized in that Determining the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit includes: The current wear degree of the PDC drill bit is determined according to the wear index and the axial vibration index of the PDC drill bit.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: The corresponding relationship between the drilling pressure, rotation speed, drilling speed, wear index, stick-slip vibration index, axial vibration index and mechanical specific energy of the PDC drill bit and the drilling depth is obtained and displayed.

7. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: The drill bit type and drill bit model of the PDC drill bit are obtained and displayed.

8. A PDC drill bit wear assessment device, characterized in that: include: An acquisition module is used to acquire real-time logging data of a PDC drill bit, wherein the real-time logging data includes drill bit rotation speed, mechanical drilling speed and drilling pressure; A processing module, configured to determine a wear index of the PDC drill bit according to the drill bit rotation speed, the mechanical drilling speed and the drilling pressure; The evaluation module is used to determine the current wear degree of the PDC drill bit according to the wear index of the PDC drill bit.

9. An electronic device, characterized in that: include: at least one processor and memory; The memory stores computer-executable instructions; The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the PDC drill bit wear assessment method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the PDC drill bit wear assessment method according to any one of claims 1 to 7.

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