Drilling torque and thrust prediction method based on hydraulic pressure of drilling machine and drilling machine test system

Abstract

The invention relates to a drilling torque and thrust prediction method based on drilling machine hydraulic pressure, and the method only needs to collect test data in advance through a drilling machine test system before engineering, obtains a conversion formula through fitting, and then obtains the real torque and thrust through monitoring the hydraulic pressure in a real drill hole through the obtained conversion formula. And real acquisition of mechanical data monitored while drilling is realized. The test system comprises a hydraulic sensor, a pressure sensor, a magnetic powder brake and a dynamic torque rotating speed sensor. Besides, each drilling machine only needs to be subjected to the test method once, and the obtained conversion formula can be applied to the drilling machine forever and is not influenced by abrasion of a drill bit and replacement of parts such as a drill rod.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, and in particular to a drilling torque and thrust prediction method based on drilling rig hydraulic pressure and a drilling rig test system. Background Art

[0002] As early as the 1930s, the technology of using instruments to record the parameters of the drilling process while drilling was used to measure the physical and chemical composition of drilling fluids in the exploration and development of oil and gas wells. Now, the oil and gas field and mineral mining industries use logging while drilling or monitoring while drilling extensively. The main purpose of these monitoring while drilling is to monitor the chemical composition and physical properties of drilling fluids, monitor the normal operation of drilling tools, drilling geological guidance and optimize the drilling process. Its most important feature is that the data is collected according to the drilling depth, and the collected data are all depth sequences arranged according to the drilling depth interval. After the 1970s, rock engineering researchers in France, Canada, Italy, the United States and Japan learned about these instruments of drilling parameters, hoping to solve some stratigraphic division problems in geotechnical drilling. They began to use instruments to monitor parameters while drilling and divide stratigraphic quality in geotechnical site surveys. These drilling parameters can be used to provide important support for projects such as soil-rock interface identification at dredging sites, site foundation reinforcement, engineering site surveys, weak coal seams in hard rocks, soil grouting reinforcement inspections, rock mass engineering ratings, and cave exploration in power plants.

[0003] Although some foreign researchers have devoted themselves to the research and work of monitoring while drilling for the quality evaluation of the rock and soil mass on the site, monitoring while drilling has not been carried out in geotechnical engineering and rock engineering, and it is not a conventional or standardized method for geotechnical construction or exploration. One of the major problems is that drilling and breaking rock is the physical direct destruction of the rock and soil mass by the drill bit, so it is necessary to collect direct mechanical parameters, such as torque and thrust during the drilling process, so that the lithology or interface of the underground rock and soil mass can be analyzed later. However, these mechanical parameters while drilling are difficult to measure directly, because if these mechanical parameters such as torque and thrust are to be directly measured, a series of sensors need to be installed in the drill bit and the drill rod, and these installed equipment will undoubtedly affect the drilling efficiency of the drilling rig. Therefore, the scientific research development and market popularity of monitoring while drilling have been greatly limited for many years. Although many universities have developed specific drilling rigs that can measure the drilling mechanical parameters, these special drilling rigs or equipment are expensive, and their portability and popularity still need to be further improved. This difficulty has caused many foreign geotechnical researchers to lose interest in conducting in-depth research on monitoring while drilling, and there are very few related research papers.

[0004] Therefore, how to non-destructively and conveniently monitor the real torque and thrust of the drilling rig during the drilling process in the rock mass so as to meet the requirements of later analysis of the while-drilling monitoring data has become a technical problem that needs to be solved. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a drilling torque and thrust prediction method and a drilling rig test system based on drilling rig hydraulics, so as to solve or partially solve the current problem of lack of a method for conveniently obtaining the torque and thrust of the drilling rig during the drilling process in rock and soil.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] In one aspect of the present invention, a drilling torque and thrust prediction method based on drilling rig hydraulics is provided. By collecting the rotation hydraulics, propulsion hydraulics and drilling speed data of the drilling rig, the predicted torque and thrust are obtained by using the fitted drilling torque prediction formula and thrust prediction formula, and online prediction is realized.

[0008] The process of constructing the drilling torque prediction formula includes the following steps:

[0009] Through the test, the actual measured rotary hydraulic pressure, drilling speed and torque data of the target drilling rig under various rotary hydraulic gear positions and rotary resistance combinations over a period of time are obtained;

[0010] The rotary hydraulic pressure, drilling speed and torque data are averaged in the time dimension, and fitted in the combination dimension to obtain a drilling torque prediction formula based on hydraulic pressure and drilling speed;

[0011] The construction process of the thrust prediction formula includes the following steps:

[0012] Through the test, the propulsion hydraulic pressure and drill bit pressure data of the target drilling rig under various combinations of rotary hydraulic gears and rotary resistances are obtained over a period of time;

[0013] The propulsion hydraulic pressure and drill bit pressure data are averaged in the time dimension and fitted in the combination dimension to obtain a thrust prediction formula based on the propulsion hydraulic pressure.

[0014] As a preferred technical solution, in the process of fitting the drilling torque prediction formula, the fitting process in the combined dimension includes the following steps:

[0015] In the combination dimension, for each combination of rotary hydraulic gear and rotary resistance, based on the rotary hydraulic pressure, drilling speed and torque data averaged in the time dimension, the average torque-average rotary hydraulic pressure fitting formula under the same drilling speed is obtained through linear fitting;

[0016] Based on the linear intercept of the average torque-average rotation hydraulic pressure fitting formula, a linear intercept-average drilling speed fitting formula is obtained through linear fitting;

[0017] Based on the average torque-average rotational hydraulic pressure fitting formula and the linear intercept-average drilling speed fitting formula, a thrust prediction formula based on propulsion hydraulic pressure is obtained.

[0018] As a preferred technical solution, the average torque-average rotation hydraulic fitting formula is:

[0019] T=r 1 P r +y

[0020] Among them, T, P r are the average torque, average rotational hydraulic pressure, and r 1 , y are the linear slope and linear intercept respectively.

[0021] As a preferred technical solution, the linear intercept-average drilling speed fitting formula is:

[0022] y=r 2 RPM

[0023] Among them, r 2 , y are the linear slope and linear intercept respectively, and RPM is the average drilling speed.

[0024] As a preferred technical solution, the thrust prediction formula is:

[0025] T=r 1 P r +r 2 RPM

[0026] Among them, T, P r , RPM are average torque, average rotary hydraulic pressure, and average drilling speed, respectively. 1 、r 2 is the linear slope.

[0027] As a preferred technical solution, the thrust prediction formula is:

[0028] F t =sP t

[0029] Among them, P t 、F t are propulsion hydraulic pressure and thrust respectively, and s is the linear slope.

[0030] As a preferred technical solution, in the drilling torque prediction formula, the rotational hydraulic pressure is positively correlated with the torque, and the linear intercept is negatively correlated with the drilling speed; in the thrust prediction formula, the propulsion hydraulic pressure is positively correlated with the thrust.

[0031] As a preferred technical solution, it also includes:

[0032] The performance of the drilling rig is evaluated based on the linear slope obtained from the fitting formula.

[0033] As a preferred technical solution, in the process of measuring the rotational hydraulic pressure, drilling speed and torque data, measurement starts from the combination corresponding to the smallest rotational hydraulic pressure gear and the smallest rotational resistance; in the process of measuring the propulsion hydraulic pressure and drill bit pressure data, measurement starts from the corresponding combination of the smallest propulsion hydraulic pressure.

[0034] Another aspect of the present invention provides a drilling rig test system for acquiring test data in the aforementioned drilling rig hydraulic-based drilling torque and thrust prediction method.

[0035] The drilling rig test system, in a first state, comprises:

[0036] Magnetic powder brakes, used to provide rotational resistance to the drill;

[0037] A dynamic torque drilling speed sensor is connected to the magnetic powder brake and one end of the drill rod of the drilling rig, respectively, and is used to measure real-time torque and drilling speed;

[0038] A rotary hydraulic pressure sensor connected to the hydraulic assembly of the drill pipe of the drilling rig to measure the real-time rotary hydraulic pressure;

[0039] The drilling rig test system, in the second state, comprises:

[0040] Pressure sensor, used to measure the real-time pressure of the drilling rig drill pipe;

[0041] The propulsion hydraulic pressure sensor is connected to the hydraulic assembly of the drilling rig drill pipe to measure the real-time propulsion hydraulic pressure.

[0042] As a preferred technical solution, in the first state, it also includes:

[0043] A first coupling is connected to the magnetic powder brake and the dynamic torque drilling speed sensor respectively;

[0044] The second coupling is connected to the dynamic torque drilling speed sensor and the drilling rig drill rod respectively.

[0045] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0046] (1) Realizing online prediction of torque and thrust during drilling: In order to solve the problem that torque and thrust cannot be conveniently measured during drilling without modifying the drilling rig, the present invention obtains multiple combinations of test data measured over a period of time, and respectively fits the functional relationship between the rotary hydraulic pressure, drilling speed, torque, propulsion hydraulic pressure, and drill bit pressure to obtain a fitting formula, thereby realizing online non-destructive and accurate prediction of torque and thrust during drilling, allowing operators to monitor the on-site drilling torque and axial force, thus overcoming this limitation of drilling monitoring.

[0047] (2) Wide scope of application: The present invention does not require major modifications to the drilling rig body and is applicable to various types of hydraulic drilling rigs, greatly reducing the equipment cost of while-drilling monitoring and the difficulty of data collection, helping to promote the scientific research development and application of while-drilling monitoring.

[0048] (3) Evaluation of drilling rig performance: The present invention evaluates the drilling rig performance based on the linear slope obtained in the fitting formula process, and the operator can select a suitable drilling rig for operation based on the evaluation result. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic diagram of a drilling torque and thrust prediction method based on drilling rig hydraulic pressure in an embodiment;

[0050] Figure 2 is a schematic diagram of the drilling rig test system in the first state in the embodiment;

[0051] Figure 3 is a schematic diagram of the drilling rig test system in the second state in the embodiment;

[0052] Figure 4 It is a schematic diagram of calculating the average values ​​of the time series rotation hydraulic pressure, rotation speed and torque in the embodiment;

[0053] Figure 5 is a graph showing the relationship between the average rotational hydraulic pressure and the average torque in the embodiment;

[0054] Figure 6 Schematic diagram of the relationship between the intercept and the average drilling speed in the embodiment;

[0055] Figure 7 A schematic diagram of obtaining the average propulsion hydraulic pressure and average thrust of the time series in the embodiment;

[0056] Figure 8 This is a schematic diagram of obtaining the conversion formula between thrust and propulsion hydraulic pressure in the embodiment.

[0057] Among them, 1. Magnetic powder brake, 2. Dynamic torque drilling speed sensor, 3. Rotational hydraulic sensor, 4. Pressure sensor, 5. Propulsion hydraulic sensor, 6. Drilling rig drill pipe. DETAILED DESCRIPTION

[0058] 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 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 should fall within the scope of protection of the present invention.

[0059] Example 1

[0060] In view of the problems existing in the above-mentioned prior art, this embodiment provides a method for predicting drilling torque and thrust based on drilling rig hydraulic pressure. It only needs to conduct a set of tests on each drilling rig before drilling to obtain the conversion formula corresponding to the drilling rig. The conversion formula can be used in the actual rock drilling process of the drilling rig, and accurate torque and thrust can be obtained by only monitoring the drilling rig hydraulic pressure and drilling speed. This method can effectively solve the limitations of drilling parameter collection, thereby reducing the cost and manufacturing time of drilling monitoring equipment.

[0061] See also Figure 1 The method includes three stages: construction of drilling torque prediction formula (corresponding to steps S1 and S2), construction of thrust prediction formula (corresponding to steps S3 and S4), and online prediction, wherein the construction stages of the two formulas can be performed simultaneously or in a different order. Specifically, the method includes the following steps;

[0062] The process of constructing the drilling torque prediction formula includes the following steps:

[0063] Step S1, obtaining the actual measured rotary hydraulic pressure, drilling speed and torque data of the target drilling rig under various rotary hydraulic gear positions and rotary resistance combinations over a period of time through experiments.

[0064] The resistance of the magnetic powder brake used to provide rotation resistance for the drilling rig is selected from five gears from small to large. In addition, the drilling rig rotation hydraulic pressure is also selected from five gears. After the test starts, the magnetic powder brake is adjusted to the minimum gear, and then the drilling rig rotation hydraulic pressure is also adjusted to the minimum gear, and maintained for at least ten seconds, and the hydraulic pressure, drilling speed and torque are recorded by the sensor.

[0065] Then increase the rotary hydraulic gear of the drilling rig in sequence, with each gear maintaining a data collection time of ten seconds.

[0066] Subsequently, after all five gears of the drilling rig’s rotary hydraulics have been collected, the gear of the magnetic powder brake is adjusted to the next gear, and the above process is repeated until all five gears of the magnetic powder brake have collected data and the test is completed, and the time series data of the rotary hydraulics, drilling speed, and torque under multiple combinations are obtained.

[0067] Step S2, averaging the rotational hydraulic pressure, drilling speed and torque data in the time dimension, and fitting in the combined dimension to obtain a drilling torque prediction formula based on hydraulic pressure and drilling speed.

[0068] Under each gear condition, the collected 10-second rotation hydraulic pressure, speed and torque can be used to obtain the corresponding average rotation hydraulic pressure P by the average method. r , average speed RPM and average torque T, such as Figure 4 described.

[0069] Using the average rotary hydraulic P r and the average torque T, a line graph is established with the horizontal axis being the rotary hydraulic pressure and the vertical axis being the torque, such as Figure 5 described.

[0070] In the line chart, the data with the same rotation speed are grouped together, and the average rotary hydraulic pressure P under the same drilling speed conditions is obtained through linear fitting. r The linear formula with the average torque T. If the test sets five rotary hydraulic gears according to the method, there will be five corresponding rotation speeds, so five straight lines need to be fitted to obtain five fitting formulas. The number of rotary hydraulic gears is equal to the number of linear fitting formulas. The fitting formula needs to be consistent with the following formula. Among them, r 1 is the linear slope, also named the coefficient of rotational hydraulic pressure and torque, and y is the linear intercept.

[0071] T=r 1 P r +y

[0072] The intercept y in all linear fitting formulas needs to be recorded and a line graph with the corresponding rotation speed is established with the horizontal axis as the drilling speed and the vertical axis as the intercept, such as Figure 6 Then, the fitting formula of intercept y and speed RPM is obtained by linear fitting. The fitting formula needs to be consistent with the following formula. Wherein, r 2 is the linear slope, also named the speed and rotary hydraulic coefficient. Note that this linear relationship has no intercept, when y=0, RPM=0.

[0073] y=r 2 RPM

[0074] According to the linear formula, the following final conversion formula of rotary hydraulic pressure and drilling speed to torque is obtained by integration. This formula is specific to the drilling rig used in the test, and the torque can be inversely calculated by monitoring the rotary hydraulic pressure and drilling speed.

[0075] T=r 1 P r +r 2 RPM

[0076] In the formula, at the same speed, the rotary hydraulic pressure P r It is positively correlated with torque T, and the intercept y is negatively correlated with the speed RPM. 1 and r 2 The value can be used as a reference to measure the efficiency of the drilling rig: 1 The relationship between the rotary hydraulic pressure and torque of the drilling rig in the test is revealed. 1 The larger the value, the greater the torque the drill can provide under the condition of smaller rotation hydraulic pressure, which means the better the rotation efficiency of the drill. 2 The increase in rotary hydraulic pressure required to increase the drilling speed of the drilling rig in the experiment is revealed. 2 The smaller the value, the smaller the rotary hydraulic increment is required to increase the drilling speed of the drilling rig, which means that the drilling rig performance is better.

[0077] Step S3, obtaining, through experiments, propulsion hydraulic pressure and drill bit pressure data measured over a period of time under various combinations of rotary hydraulic gears and rotary resistances of the target drilling rig.

[0078] First, select ten gears of the propulsion hydraulic pressure of the drilling rig from small to large. Then set the propulsion hydraulic pressure of the drilling rig to the smallest gear, let the drill bit press on the pressure sensor under the condition of this gear, and collect the propulsion hydraulic pressure through the propulsion hydraulic pressure sensor, and collect the pressure through the pressure sensor. In this process, the drill bit needs to keep in contact for ten seconds.

[0079] Control the drilling rig propulsion hydraulic pressure and adjust it to different propulsion hydraulic pressure levels from small to large. Repeat the above process until the relative data of all ten levels are collected to obtain the time series data of propulsion hydraulic pressure and drill bit pressure measured over a period of time.

[0080] Step S4, averaging the propulsion hydraulic pressure and drill bit pressure data in the time dimension, and fitting in the combination dimension to obtain a thrust prediction formula based on the propulsion hydraulic pressure.

[0081] The propulsion hydraulic pressure and pressure collected in time series are averaged to obtain the relative average propulsion hydraulic pressure P t and the corresponding average thrust F t ,like Figure 7 described.

[0082] The average propulsion hydraulic pressure P obtained by the method t and the corresponding average thrust F t , establish a horizontal axis for the propulsion hydraulic pressure P t , the vertical coordinate is the thrust F t Line chart of .

[0083] Average propulsion hydraulic pressure P t and the corresponding average thrust F tA linear relationship is presented. Through linear fitting, the following consistent final fitting formula is obtained, where s is the linear slope, representing the relationship between the propulsion hydraulic pressure and the thrust. Note that this linear fitting formula has no intercept. The following formula can be used as a relative drill bit thrust obtained by real-time monitoring of the propulsion hydraulic pressure during the actual drilling process.

[0084] F t =sP t

[0085] In the above formula, the thrust hydraulic pressure P t With thrust F t The obtained s value can be used as a reference value to measure the effectiveness of the drilling rig: s reveals the relationship between the propulsion hydraulic pressure and thrust of the drilling rig in the test. The larger the s value, the greater the thrust that the drilling rig can provide under the condition of smaller propulsion hydraulic pressure, indicating that the thrust effectiveness of the drilling rig is better.

[0086] Step S5, by collecting the rotary hydraulic pressure, propulsion hydraulic pressure and drilling speed data of the drill rig, using the fitted drilling torque prediction formula and thrust prediction formula, the predicted torque and thrust are obtained to achieve online prediction.

[0087] By installing the rotation hydraulic pressure sensor and propulsion hydraulic pressure sensor, the rotation hydraulic pressure and propulsion hydraulic pressure in the drilling process are collected during the actual on-site drilling process.

[0088] By installing the photoelectric drilling speed sensor, the drilling speed of the drill rod during the actual on-site drilling process is collected.

[0089] Finally, the torque and thrust in the actual drilling process are obtained through the conversion formula of the rotary hydraulic pressure and speed to torque, and the conversion formula of the propulsion hydraulic pressure to thrust obtained in the previous step, providing real and accurate drilling parameters for the subsequent drilling parameter mechanical analysis.

[0090] This method has the following beneficial effects:

[0091] (1) Two new test flow schemes were adopted. Through these two tests, the conversion formulas of the rotary hydraulic pressure and the corresponding torque of the drilling rig, and the corresponding thrust of the propulsion hydraulic pressure can be obtained;

[0092] (2) The method of this embodiment is applicable to any type of hydraulic drilling rig;

[0093] (3) This method allows operators to measure the actual on-site drilling torque and axial force, overcoming the limitation of this monitoring while drilling problem;

[0094] (4) The conversion formula coefficient r proposed by this method 1 、r 2 and s can be used as a new method to evaluate the quality of drilling rigs;

[0095] (5) This method greatly reduces the equipment cost of MWD and reduces the difficulty of data collection, helping to promote the scientific research development and application of MWD.

[0096] Example 2

[0097] On the basis of Example 1, this embodiment provides a drilling rig test system for acquiring test data in the drilling torque and thrust prediction method of Example 1. This system has two states.

[0098] like Figure 1 Shown is a schematic diagram of the structure of the system in the first state, which is used to obtain test data to construct a conversion formula of rotary hydraulic pressure and drilling speed to torque.

[0099] Figure 1 The components include a rotary hydraulic sensor, a dynamic torque drilling speed sensor, a magnetic powder brake and a coupling.

[0100] The magnetic powder brake is a conventional commercially available magnetic powder brake that provides controllable rotation resistance through 220V current.

[0101] The rotary hydraulic sensor and the propulsion hydraulic sensor are respectively installed in the corresponding rotary hydraulic pipe and propulsion hydraulic pipe of the drilling rig through a three-way interface.

[0102] The dynamic torque drilling speed sensor is a common dynamic torque drilling speed sensor purchased on the market. It can measure torque and drilling speed in real time and transmit the data to computer analysis software.

[0103] The coupling is a conventional coupling purchased on the market, and two couplings are needed in total, one for connecting the magnetic powder brake and the dynamic torque drilling speed sensor, and the other for connecting the dynamic torque drilling speed sensor and the drill rod of the drilling rig.

[0104] The coupling port needs to be customized according to the size and shape of the corresponding equipment port. For example, the drill pipe is generally a cylinder or a regular hexagonal column, and the ports of the magnetic powder brake and the dynamic torque drilling speed sensor are generally cylindrical metal rods.

[0105] Before starting the experiment, you need to Figure 1 The installation method of the components connects the magnetic powder brake, the dynamic torque drilling speed sensor and the drilling rig drill pipe together through two couplings.

[0106] like Figure 2 Shown is a schematic diagram of the structure of the second state of the system, which is used to obtain test data to construct a conversion formula for propulsion hydraulic pressure and thrust.

[0107] Figure 2 Components include propulsion hydraulic sensors and pressure sensors.

[0108] The pressure sensor is a conventional commercially available pressure sensor that can directly measure pressure and transmit the data to computer analysis software.

[0109] The propulsion hydraulic sensor is a conventional hydraulic sensor purchased on the market. By installing it on the propulsion hydraulic oil pipe, it can directly measure the propulsion hydraulic pressure of the drilling rig.

[0110] Before starting the test, you need to Figure 2 As described above, a pressure sensor is fixed on a test bench and placed in front of the drill bit. By controlling the propulsion controller of the drilling rig, the drill bit will contact the pressure sensor and exert pressure on it, and this pressure will be recorded in the form of Newton force (unit: Newton). At the same time, the propulsion hydraulic pressure installed on the propulsion hydraulic oil pipe of the drilling rig will be recorded by the propulsion hydraulic pressure sensor in the form of hydraulic pressure (unit: MPa).

[0111] In summary, the present invention relates to a method for hydraulically converting torque and thrust that can be used on any hydraulic drilling rig. The method only requires collecting test data through a test system in advance before the project, and then deriving a conversion formula. The test system includes a hydraulic sensor, a pressure sensor, a magnetic powder brake, and a dynamic torque speed sensor. Afterwards, the obtained conversion formula can be used to derive the real torque and thrust by monitoring the hydraulic pressure in the actual drilling process, thereby realizing the real collection of mechanical data for drilling monitoring. In addition, each drilling rig only needs to perform the test method once, and the obtained conversion formula can be permanently applied to the drilling rig without being affected by drill bit wear and replacement of parts such as drill rods.

[0112] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A drilling torque and thrust prediction method based on drilling rig hydraulics, characterized in that: By collecting the rotary hydraulic pressure, propulsion hydraulic pressure and drilling speed data of the drilling rig, the predicted torque and thrust are obtained by using the fitted drilling torque prediction formula and thrust prediction formula to achieve online prediction. The process of constructing the drilling torque prediction formula includes the following steps: Through the test, the actual measured rotary hydraulic pressure, drilling speed and torque data of the target drilling rig under various rotary hydraulic gear positions and rotary resistance combinations over a period of time are obtained; The rotary hydraulic pressure, drilling speed and torque data are averaged in the time dimension, and fitted in the combination dimension to obtain a drilling torque prediction formula based on hydraulic pressure and drilling speed; The construction process of the thrust prediction formula includes the following steps: Through the test, the propulsion hydraulic pressure and drill bit pressure data of the target drilling rig under various combinations of rotary hydraulic gears and rotary resistances are obtained over a period of time; The propulsion hydraulic pressure and drill bit pressure data are averaged in the time dimension and fitted in the combination dimension to obtain a thrust prediction formula based on the propulsion hydraulic pressure.

2. The method for predicting drilling torque and thrust based on drilling rig hydraulic pressure according to claim 1, characterized in that: In the process of fitting the drilling torque prediction formula, the fitting process in the combined dimension includes the following steps: In the combination dimension, for each combination of rotary hydraulic gear and rotary resistance, based on the rotary hydraulic pressure, drilling speed and torque data averaged in the time dimension, the average torque-average rotary hydraulic pressure fitting formula under the same drilling speed is obtained through linear fitting; Based on the linear intercept of the average torque-average rotation hydraulic pressure fitting formula, a linear intercept-average drilling speed fitting formula is obtained through linear fitting; Based on the average torque-average rotational hydraulic pressure fitting formula and the linear intercept-average drilling speed fitting formula, a thrust prediction formula based on propulsion hydraulic pressure is obtained.

3. The method for predicting drilling torque and thrust based on drilling rig hydraulic pressure according to claim 2, characterized in that: The average torque-average rotation hydraulic fitting formula is: T=r1P r +y Among them, T, P r are the average torque and average rotational hydraulic pressure, r1 and y are the linear slope and linear intercept, respectively.

4. The method for predicting drilling torque and thrust based on drilling rig hydraulic pressure according to claim 2, characterized in that: The linear intercept-average drilling speed fitting formula is: y=r2RPM Among them, r2 and y are the linear slope and linear intercept respectively, and RPM is the average drilling speed.

5. The method for predicting drilling torque and thrust based on drilling rig hydraulic pressure according to claim 1, characterized in that: The thrust prediction formula is: T=r1P r +r2RPM Among them, T, P r , RPM are the average torque, average rotary hydraulic pressure, and average drilling speed, respectively. r1 and r2 are the linear slopes.

6. The method for predicting drilling torque and thrust based on drilling rig hydraulic pressure according to claim 1, characterized in that: The thrust prediction formula is: F t =sP t Among them, P t 、F t are propulsion hydraulic pressure and thrust respectively, and s is the linear slope.

7. The method for predicting drilling torque and thrust based on drilling rig hydraulic pressure according to claim 1, characterized in that: Also includes: The performance of the drilling rig is evaluated based on the linear slope obtained from the fitting formula.

8. The method for predicting drilling torque and thrust based on drilling rig hydraulic pressure according to claim 1, characterized in that: When measuring the rotary hydraulic pressure, drilling speed and torque data, measurement starts from the combination corresponding to the smallest rotary hydraulic pressure gear and the smallest rotary resistance; when measuring the propulsion hydraulic pressure and drill bit pressure data, measurement starts from the combination corresponding to the smallest propulsion hydraulic pressure.

9. A drilling rig test system, characterized in that: Used to achieve the acquisition of test data in the drilling torque and thrust prediction method based on drilling rig hydraulics as described in any one of claims 1-8, The drilling rig test system, in a first state, comprises: A magnetic powder brake (1) for providing rotation resistance to the drilling rig; A dynamic torque drilling speed sensor (2) is connected to the magnetic powder brake (1) and one end of the drilling rig drill rod (6) respectively, and is used to measure real-time torque and drilling speed; A rotary hydraulic pressure sensor (3) connected to a hydraulic component of a drilling rig drill pipe (6) for measuring real-time rotary hydraulic pressure; The drilling rig test system, in the second state, comprises: A pressure sensor (4) is used to measure the real-time pressure of the drilling rig drill pipe (6); The propulsion hydraulic pressure sensor (5) is connected to the hydraulic component of the drilling rig drill rod (6) and is used to measure the real-time propulsion hydraulic pressure.

10. A drilling rig test system according to claim 9, characterized in that: In the first state, it also includes: A first coupling is connected to the magnetic powder brake (1) and the dynamic torque drilling speed sensor (2) respectively; The second coupling is connected to the dynamic torque drilling speed sensor (2) and the drilling rig drill rod (6) respectively.

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