Ground test device for rotary steering instrument, and measuring method and control method of ground test device

Abstract

The invention provides a rotary steering instrument ground test device and a measuring method and a control method thereof.The rotary steering instrument ground test device comprises a support, a first driving part, a rotary steering mechanism, a drill bit simulator and a steering angle measuring mechanism, the first driving part is arranged on the support, and the rotary steering mechanism comprises a shell and a mandrel; the first driving part is in driving connection with the shell, the output end of the mandrel extends towards the side away from the first driving part and is eccentrically arranged with the shell, the output end of the mandrel is connected with the drill bit simulator, and the guide angle measuring mechanism is arranged on the side, away from the first driving part, of the drill bit simulator. According to the ground test device for the rotary steering instrument, the drilling working condition of the instrument can be simulated under the condition of a test room, ground drilling is simulated, and the moving track of the mandrel and the steering angle of the mandrel are obtained through the steering angle measuring mechanism; the problem that drilling risks exist due to the fact that an effective ground testing device for simulating the drilling working condition is lacked in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field related to petroleum equipment, and in particular to a ground test device for a rotary steerable instrument and a measuring method and a control method thereof. Background Art

[0002] Traditional sliding steer drilling methods have certain limitations, such as low wellbore cleaning efficiency, insufficient trajectory control accuracy, and limited displacement extension capabilities, especially in complex geological conditions. In sliding steer drilling, the drill string slides in the wellbore, resulting in high friction and poor wellbore cleaning effect, which can easily cause drilling drill sticking, drill tool wear and other faults, which not only increases drilling costs, but may also delay oilfield development progress.

[0003] The emergence of rotary steerable drilling technology has broken this bottleneck. In rotary steerable drilling, the drill string rotates continuously, and the steering system can adjust the wellbore trajectory in real time to achieve the desired wellbore geometry. This method greatly improves the wellbore purification effect and reduces the accumulation of wellbore sediments. At the same time, the continuous rotational motion reduces friction, extends the service life of the drill bit, and improves the drilling speed and drilling efficiency. More importantly, rotary steerable drilling can accurately control the wellbore trajectory and maintain the stability and accuracy of the wellbore even in narrow formation gaps or complex geological structures. This is of great value for the exploration and development of marine oil and gas resources, as well as special process wells such as ultra-deep wells, high-difficulty directional wells, cluster wells, and large-displacement horizontal wells in complex onshore oil and gas reservoirs.

[0004] However, despite the significant advantages that rotary steerable drilling technology brings, its development and verification process faces huge challenges. Currently, there is a lack of effective ground test equipment to simulate drilling conditions, especially for the performance testing of directional rotary steerable instruments, which are steerable instruments that can maintain a specific direction while drilling. There are huge risks in applying newly developed instruments or repaired instruments directly to actual drilling without ground testing. The instrument may exhibit unstable or unpredictable behavior in the downhole environment, resulting in reduced drilling efficiency and even drilling accidents, causing huge economic losses and safety issues.

[0005] As can be seen from the above, the existing technology lacks effective ground test equipment to simulate drilling conditions, resulting in drilling risks. Summary of the invention

[0006] The main purpose of the present invention is to provide a method to solve the problem in the prior art of lacking an effective ground test device to simulate drilling conditions, resulting in drilling risks.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a ground test device for a rotary steerable instrument is provided, which includes a bracket, a first drive member, a rotary steerable mechanism, a drill bit simulator and a guide angle measuring mechanism. The first drive member is arranged on the bracket, and the rotary steerable mechanism includes a shell and a core shaft. The first drive member is drive-connected to the shell, the input end of the core shaft is arranged inside the shell, the output end of the core shaft extends toward a side away from the first drive member and is eccentrically arranged to the shell, the output end of the core shaft is connected to the drill bit simulator, and the guide angle measuring mechanism is arranged on a side of the drill bit simulator away from the first drive member, so as to obtain the guide angle of the drill bit simulator.

[0008] Furthermore, the ground test device of the rotary steering instrument also includes a rotary joint, one of which is a liquid inlet rotary joint, and the other is a liquid outlet rotary joint. The liquid inlet rotary joint is arranged between the first driving member and the rotary steering mechanism, the outer shell and the core shaft of the rotary steering mechanism form an axially extending first liquid passage, the liquid inlet rotary joint is connected with the first liquid passage, the liquid outlet rotary joint is arranged at an end of the drill simulator away from the first driving member, a part of the steering angle measuring mechanism is arranged on the liquid outlet rotary joint, the drill simulator has a second liquid passage connected with the first liquid passage, the second liquid passage is connected with the liquid outlet rotary joint, the liquid inlet rotary joint, the first liquid passage, the second liquid passage and the liquid outlet rotary joint form a circulation flow channel for the liquid.

[0009] Furthermore, the rotary joint includes a rotating shaft, a shell and a hose. The rotating shaft has an axially extending flow channel. The rotating shaft is rotatably connected to the first driving member or the drill simulator. The shell is arranged on the rotating shaft through a bearing. The shell and the rotating shaft form a liquid storage chamber arranged on the outer peripheral side of the rotating shaft. The rotating shaft has a through hole. The flow channel is connected to the liquid storage chamber through the through hole, and the hose is connected to the liquid storage chamber.

[0010] Furthermore, the rotary joint also includes a seal, which is arranged between the shell and the rotating shaft. Bearings are arranged on both sides of the axial liquid storage cavity along the rotating shaft. The seal is arranged between the bearing and the liquid storage cavity for isolating the bearing and the liquid storage cavity.

[0011] Furthermore, a biasing mechanism is built into the rotary guide mechanism, one end of the core shaft is controlled by the biasing mechanism, the biasing mechanism causes the core shaft to form a fixed inclination angle with the axis of the outer shell, and the rotary guide mechanism also includes a built-in driving component arranged inside the outer shell, the built-in driving component is connected to the biasing mechanism, the built-in driving component provides driving force for the rotation of the biasing mechanism, and then the built-in driving component provides driving force for the rotation of the core shaft.

[0012] Furthermore, the rotary steering instrument ground test device also includes a support member, which is arranged on the bracket, and the rotary steering mechanism is supported on the support member.

[0013] Furthermore, the rotary steerable instrument ground test device also includes a loading mechanism, which is arranged on the bracket. The loading mechanism has a pushing structure for providing drilling pressure, and the pushing structure moves toward or away from the drill bit simulator along the length direction of the bracket.

[0014] Furthermore, the loading mechanism includes a second driving member, a guide rod, a support seat and a pushing structure. The second driving member is arranged on the bracket, the second driving member is connected to the pushing structure, the pushing structure is arranged on the guide rod, the support seat supports the guide rod, and the support seat is arranged on the bracket.

[0015] Furthermore, the drill simulator includes a connecting shaft, a thrust spherical roller bearing, a ball head and a ball seat. One end of the connecting shaft is connected to the core shaft, the thrust spherical roller bearing is sleeved on the connecting shaft, the ball head is installed on the connecting shaft through the thrust spherical roller bearing, the pushing structure has a mounting groove arranged on the outer peripheral side of the connecting shaft, the ball seat is installed in the mounting groove, and the ball head and the ball seat form a spherical fit.

[0016] Furthermore, the guidance angle measurement mechanism includes a target, an image collector, a laser generator, an adjustment frame and a processor. The target is arranged on the side of the liquid outlet rotary joint of the ground test device of the rotary guidance instrument away from the first driving member. The target has a reflective structure. The laser generator is used to emit light to the target. The image collector receives the light reflected by the reflective structure. The image collector and the laser generator are arranged on the adjustment frame. The processor is connected to the image collector signal for outputting the guidance angle.

[0017] Furthermore, the adjustment frame includes a base, an adjustment rod and a support rod. The adjustment rod is slidably set on the base along the width direction of the bracket, the support rod is slidably set on the adjustment rod along the height direction of the bracket, the support rod extends toward one side of the target along the length direction of the bracket, and the image collector and the laser generator are slidably set on the support rod along the axial direction of the support rod.

[0018] According to another aspect of the present invention, a measurement method is provided, which is applied to the above-mentioned rotary steerable instrument ground test device, the rotary steerable instrument ground test device having a first steerable mode and a second straight line mode, and the measurement method comprises:

[0019] Obtaining a mode instruction, and executing the first mode or the second mode according to the mode instruction;

[0020] Executing the first driving member to drive the housing to rotate;

[0021] When the second mode is executed, the first driving member drives the output end of the core shaft to move in a circular motion relative to the axis of the housing, and the guide angle measuring mechanism obtains reflected light to form an electronic target;

[0022] When the first mode is executed, the output end of the spindle is stationary relative to the earth, and the guide angle measuring mechanism obtains the guide angle.

[0023] Further, when the first mode is executed, it includes:

[0024] Executing a first driving member to drive the housing of the rotary guide mechanism to rotate along a first direction;

[0025] The built-in driving member that executes the rotary guide mechanism drives the biasing mechanism and the core shaft to rotate in a second direction opposite to the first direction, and the rotation speed is equal to the rotation speed in the first direction.

[0026] Further, when the second mode is executed, it includes:

[0027] Executing a first driving member to drive the housing of the rotary guide mechanism to rotate along a first direction;

[0028] The built-in driving member of the rotary guide mechanism drives the biasing mechanism and the core shaft to rotate in a second direction opposite to the first direction, and the rotation speed maintains a certain rotation speed difference with the rotation speed in the first direction.

[0029] According to another aspect of the present invention, a control method is provided, which is applied to the above-mentioned rotary steerable instrument ground test device, and the control method comprises:

[0030] Obtaining an action instruction and executing a first driving member to drive the housing of the rotary guide mechanism to rotate along a first direction;

[0031] The execution loading mechanism applies drilling pressure to the drill simulator;

[0032] Execute circulating water with preset flow rate;

[0033] The action instruction is obtained and the built-in driving component is executed to drive the biasing mechanism to rotate in a second direction opposite to the first direction, and the rotation speed is equal to the rotation speed in the first direction.

[0034] Execute Get guide angle.

[0035] According to the technical solution of the present invention, a ground test device of a rotary steering instrument includes a bracket, a first driving member, a rotary steering mechanism, a drill bit simulator and a steering angle measuring mechanism, wherein the first driving member is arranged on the bracket, the rotary steering mechanism includes a housing and a core shaft, the first driving member is drivingly connected to the housing, the input end of the core shaft is arranged inside the housing, the output end of the core shaft extends toward a side away from the first driving member and is eccentrically arranged to the housing, the output end of the core shaft is connected to the drill bit simulator, and the steering angle measuring mechanism is arranged on a side of the drill bit simulator away from the first driving member, for obtaining the steering angle of the drill bit simulator.

[0036] From the above, it can be seen that the ground test device of the rotary steerable instrument of the present application can simulate the drilling conditions of the instrument under laboratory conditions, rotate the instrument, circulate water and increase drilling pressure, realize simulated ground drilling and obtain the movement trajectory of the core shaft and the guidance angle of the core shaft through the guidance angle measurement mechanism, thereby realizing the performance test of the instrument.

[0037] The rotary steering mechanism provided in the present application can achieve the effect of simulating the steering during the drilling process, and the present application realizes the rotary steering of the drill bit during the drilling process through a drill bit simulator, thereby realizing the simulation of the steering to perform the test of the rotational steering.

[0038] The present application provides a guidance angle measurement mechanism to obtain the rotation trajectory of the core shaft during straight drilling, and can also obtain the guidance angle during directional drilling for use in guidance testing and performance testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 The overall structural schematic diagram of the rotary steerable instrument ground test device of the present invention is shown;

[0041] Figure 2 A schematic diagram showing the structure of the rotary guide mechanism, the drill simulator, the liquid outlet rotary joint and the loading mechanism of the present invention;

[0042] Figure 3 It shows a schematic structural diagram of the cooperation between the drill simulator and the liquid outlet rotary joint of the present invention;

[0043] Figure 4 A top view showing the loading mechanism of the present invention;

[0044] Figure 5 A schematic structural diagram of the guide angle measuring mechanism of the present invention is shown;

[0045] Figure 6 A schematic diagram showing the structure of the laser generator and the image collector of the present invention is shown;

[0046] Figure 7 A schematic structural diagram of the electronic target of the present invention is shown;

[0047] Figure 8 A logic block diagram of the measurement method of the present invention is shown;

[0048] Fig. 9 The logical block diagram of the control method of the present invention is shown.

[0049] The above drawings include the following reference numerals:

[0050] 10. Bracket; 20. First driving member; 30. Coupling; 40. Rotary joint; 410. Rotary shaft; 420. Flow channel; 430. Bearing; 440. Seal; 450. Liquid storage chamber; 460. Through hole; 470. Shell; 50. Support member; 60. Rotary guide mechanism; 610. Shell; 620. Mandrel; 70. Loading mechanism; 710. Second driving member; 720. Guide rod; 730. Pushing structure; 740. Support seat; 80. Drill simulator; 810. Threaded structure; 820. Connecting shaft; 830. Thrust spherical roller bearing; 840. Ball head; 850. Ball seat; 90. Hose; 100. Guide angle measuring mechanism; 1010. Fastener; 1020. Target; 1030. Image collector; 1031. Laser generator; 1040. Adjustment stand; 1050. Processor. DETAILED DESCRIPTION

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0053] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0054] Embodiment 1

[0055] In order to solve the problem in the prior art that there is a lack of effective ground test equipment to simulate drilling conditions, which leads to drilling risks, the present application provides a ground test equipment for a rotary steerable instrument, which is used to simulate ground drilling conditions and realize performance testing.

[0056] Among them, the structural setting of the present application simulates ground drilling conditions, eliminating the need for performance testing through actual drilling, thereby reducing the risks and corresponding economic losses in the prior art.

[0057] like Figures 1 to 9As shown, the ground test device of the rotary steering instrument includes a bracket 10, a first driving member 20, a rotary steering mechanism 60, a drill bit simulator 80 and a steering angle measuring mechanism 100. The first driving member 20 is arranged on the bracket 10. The rotary steering mechanism 60 includes a shell 610 and a core shaft 620. The first driving member 20 is drivingly connected to the shell 610. The input end of the core shaft 620 is arranged inside the shell 610. The output end of the core shaft 620 extends toward a side away from the first driving member 20 and is eccentrically arranged with the shell 610. The output end of the core shaft 620 is connected to the drill bit simulator 80. The steering angle measuring mechanism 100 is arranged on a side of the drill bit simulator 80 away from the first driving member 20, and is used to obtain the steering angle of the drill bit simulator 80.

[0058] The first driving member 20 is a motor; the housing 610 is a columnar structure, and the axial direction of the housing 610 is arranged in the same direction as the length direction of the bracket 10 .

[0059] The length direction of the bracket 10 is Figure 1 In the X direction shown, the height direction of the bracket 10 is Figure 1 The Z direction is shown.

[0060] Specifically, the ground test device of the rotary steerable instrument of the present application can simulate the drilling conditions of the instrument under laboratory conditions, rotate the instrument, circulate water and increase drilling pressure to achieve simulated ground drilling, and obtain the movement trajectory of the core shaft 620 and the guidance angle of the core shaft 620 through the guidance angle measurement mechanism 100, thereby realizing the performance test of the instrument.

[0061] In this embodiment, the first driving member 20, the rotary guide mechanism 60, the drill bit simulator 80 and the guide angle measuring mechanism 100 are sequentially arranged along the length direction of the bracket 10, the first driving member 20 drives the rotary guide mechanism 60 to rotate, the rotary guide mechanism 60 drives the drill bit simulator 80 to rotate, and the drill bit simulator 80 is in the same direction as the core shaft 620. The rotary guide mechanism 60 set in this application can achieve the effect of simulating the guidance during the drilling process, and this application uses the drill bit simulator 80 to simulate the rotary guidance of the drill bit during the drilling process, and then realizes the simulation of guidance to test the rotary guidance. The drill bit simulator 80 is used to simulate the drill bit during the drilling process, and rotates under the drive of the rotary guide mechanism 60.

[0062] Since the mandrel 620 is eccentrically arranged with respect to the housing 610, the motion trajectory of the output end of the mandrel 620 forms a circle in the straight drilling mode; when it is necessary to simulate directional drilling, the mandrel 620 is arranged at a fixed angle with respect to the earth to simulate the directional movement of the drill bit and to achieve the directional performance test. The present application sets a directional angle measuring mechanism 100 to obtain the rotation trajectory of the mandrel 620 during straight drilling, and can also obtain the directional angle during directional drilling for the purpose of achieving directional testing and performance testing.

[0063] like Figures 1 to 6 As shown, the ground test device of the rotary steerable instrument also includes a rotary joint 40, one of which is a liquid inlet rotary joint, and the other is a liquid outlet rotary joint. The rotary joint 40 is used to connect with a circulating water supply device of an external structure to simulate the liquid flow during the drilling process, that is, the circulating water supply device is connected to the liquid inlet rotary joint for liquid supply, and the circulating water supply device is connected to the liquid outlet rotary joint for liquid collection.

[0064] The circulating water supply device may include a water tank and a water pump, and the water pump is used to provide driving force for the flow of liquid.

[0065] Specifically, the liquid inlet rotary joint is disposed between the first driving member 20 and the rotary guide mechanism 60 , the housing 610 and the core shaft 620 form a first liquid passage extending axially, and the liquid inlet rotary joint is communicated with the first liquid passage.

[0066] The liquid outlet rotary joint is arranged at one end of the drill simulator 80 away from the first driving member 20, and a part of the guide angle measuring mechanism 100 is arranged on the liquid outlet rotary joint. The drill simulator 80 has a second liquid passage connected to the first liquid passage, and the second liquid passage is connected to the liquid outlet rotary joint. The liquid inlet rotary joint, the first liquid passage, the second liquid passage and the liquid outlet rotary joint form a circulation flow channel for the liquid, and the circulation flow channel is used for the liquid to flow to realize the liquid recycling.

[0067] In this embodiment, the rotary joint 40 includes a rotating shaft 410, a shell 470 and a hose 90. The rotating shaft 410 has an axially extending flow channel 420. The rotating shaft 410 is rotatably connected to the first driving member 20 or the drill simulator 80. The shell 470 is arranged on the rotating shaft 410 through a bearing 430. The shell 470 and the rotating shaft 410 form a liquid storage chamber 450 arranged on the outer peripheral side of the rotating shaft 410. The rotating shaft 410 has a through hole 460. The flow channel 420 is connected to the liquid storage chamber 450 through the through hole 460, and the hose 90 is connected to the liquid storage chamber 450.

[0068] In order to improve the stability of the overall structure, a coupling 30 is provided between the first driving member 20 and the rotating shaft 410 .

[0069] The hose 90 is used to communicate with the external circulating water supply device. The structure of the hose 90 is convenient for the rotating shaft of the liquid outlet rotary joint to float with the joint during the rotation process, without limiting the guidance and rotation of the core shaft 620. During the process of the core shaft 620 driving the rotating shaft 410 of the liquid outlet rotary joint to rotate, the shell of the liquid outlet rotary joint can remain stationary or float according to the test mode. That is, the rotation and pointing functions of the core shaft 620 and the drainage function of the structure are satisfied.

[0070] The rotating shaft 410 is provided with a bearing 430, so that the rotating shaft 410 can rotate while the housing 470 can remain stationary or float according to the test mode. The liquid storage chamber 450 is formed by the arrangement of the housing 470, and the high-speed flowing liquid in the flow channel 420 enters the liquid storage chamber 450 through the through hole 460. In this embodiment, four through holes 460 are arranged, and the four through holes 460 are arranged at equal intervals along the circumference of the rotating shaft 410.

[0071] In this embodiment, the rotary joint 40 also includes a seal 440, which is arranged between the housing 470 and the rotating shaft 410. Bearings 430 are arranged on both sides of the axial liquid storage chamber 450 of the rotating shaft 410. The seal 440 is arranged between the bearing 430 and the liquid storage chamber 450 to isolate the bearing 430 from the liquid storage chamber 450.

[0072] The sealing member 440 may be a sealing ring or other structural member.

[0073] Specifically, the setting of the seal 440 seals and isolates the bearing 430 from the liquid storage chamber 450, thereby separating the lubricating oil at the bearing 430 and the water inside the liquid storage chamber 450, achieving oil-liquid separation without affecting the circulation of circulating water or the lubrication of the bearing 430.

[0074] In this embodiment, the rotary guide mechanism 60 further includes a built-in biasing mechanism and a built-in driving member disposed inside the housing 610, one end of the biasing mechanism is connected to the driving member, and the other end is connected to the mandrel 620, and the built-in driving member provides a driving force for the biasing mechanism to rotate. The biasing mechanism forms a fixed inclination angle between the mandrel 620 and the axis of the housing 610.

[0075] In this embodiment, the ground test device of the rotary steering instrument also includes a support member 50, which is arranged on the bracket 10, and the rotary steering mechanism 60 is supported on the support member 50. Since the rotary steering mechanism 60 has an axial length, the coaxiality of the rotary steering mechanism 60 and the first driving member 20 or the liquid inlet rotary joint 40 is improved by arranging the support member 50, so as to avoid the occurrence of misalignment with the first driving member 20 or the liquid inlet rotary joint 40, which causes the instrument to vibrate violently or get stuck, and the test cannot be carried out normally, resulting in the problem of affecting the output of the steering angle.

[0076] like Figures 1 to 6 As shown, the rotary steerable instrument ground test device further includes a loading mechanism 70 , which is disposed on the bracket 10 . The loading mechanism 70 has a pushing structure 730 for providing bit pressure, and the pushing structure 730 moves toward or away from the drill simulator 80 along the length direction of the bracket 10 .

[0077] The loading mechanism 70 is used to apply drilling pressure to the drill simulator 80 to simulate a real drilling scene and verify the reliability of the internal structure of the instrument. The present application can adjust the drilling pressure by setting the loading mechanism 70, thereby improving the flexibility of the structural setting and simulating a multi-scenario drilling environment.

[0078] Specifically, the loading mechanism 70 includes a second driving member 710, a guide rod 720, a support seat 740 and a pushing structure 730. The second driving member 710 is arranged on the bracket 10, and the second driving member 710 is connected to the pushing structure 730. The pushing structure 730 is arranged on the guide rod 720. The support seat 740 supports the guide rod 720, and the support seat 740 is arranged on the bracket 10.

[0079] The second driving member 710 is a hydraulic cylinder, which provides driving force for the pushing structure 730. The guide rod 720 and the pushing structure 730 are slidably matched through the shaft sleeve, so that the second driving member 710 adjusts the position of the pushing structure 730 through the guide rod 720 to realize the movement of the pushing structure 730 toward or away from the drill bit simulator 80. When moving toward the drill bit simulator 80, the drilling pressure operation is realized, and when moving away from the drill bit simulator 80, the drilling pressure operation is cancelled.

[0080] In this embodiment, if Figure 4 As shown, a plurality of guide rods 720 are arranged along the width direction of the bracket 10 , and a plurality of support seats 740 are arranged along the axial direction of the guide rods 720 . The plurality of guide rods 720 are arranged in parallel at intervals, which is beneficial to improving the stability of the installation of the pushing structure 730 .

[0081] In this embodiment, the pushing structure 730 is an annular structure sleeved on the outside of the connecting shaft 820. Pushing the connecting shaft 820 by means of the structure sleeved on the outside of the connecting shaft 820 is beneficial to improving the uniformity of the force on the connecting shaft 820, thereby achieving uniform drilling pressure.

[0082] like Figure 2 As shown, the drill simulator 80 includes a connecting shaft 820, a thrust spherical roller bearing 830, a ball head 840 and a ball seat 850. One end of the connecting shaft 820 is connected to the core shaft 620 through a threaded structure 810, the thrust spherical roller bearing 830 is sleeved on the connecting shaft 820, and the ball head 840 is installed on the connecting shaft 820 through the thrust spherical roller bearing 830. The pushing structure 730 has a mounting groove arranged on the outer peripheral side of the connecting shaft 820, and the ball seat 850 is installed in the mounting groove. The ball head 840 and the ball seat 850 cooperate to form a spherical fit.

[0083] The present application loads drilling pressure on the ball seat 850 of the drill simulator 80 through the support seat 740, the ball seat 850 pushes the ball head 840, and the thrust spherical roller bearing 830 applies drilling pressure to the mandrel 620. The ball head 840 and the ball seat 850 form a spherical fit to achieve the swinging and rotating of the mandrel 620. The thrust spherical roller bearing 830 has the same function as the spherical fit and is used together with the spherical fit. The swinging range of the spherical fit is reduced, and the frictional heat of the spherical fit is reduced. The drill simulator 80 achieves that the mandrel 620 can rotate and orient normally when drilling pressure is applied.

[0084] Specifically, the thrust spherical roller bearing 830 and the spherical matching structure formed by the ball head 840 and the ball seat 850 are used to achieve the directional rotation function of the core shaft 620 and can withstand a large drilling pressure.

[0085] like Figure 1 and Figure 5 As shown, the guidance angle measuring mechanism 100 includes a target 1020, an image collector 1030, a laser generator 1031, an adjustment frame 1040 and a processor 1050. The target 1020 is arranged on a side of the liquid outlet rotary joint of the ground test device of the rotary steering instrument away from the first driving member 20. The target 1020 has a reflective structure. The laser generator 1031 is used to emit light to the target 1020. The image collector 1030 receives the light reflected by the reflective structure. The image collector 1030 and the laser generator 1031 are arranged on the adjustment frame 1040. The processor 1050 is connected to the image collector 1030 by signal for outputting the guidance angle.

[0086] Specifically, the non-contact angle measurement device used in the present application can collect an image of the center of the target 1020. After image processing, the position and angle of the target 1020 are displayed on the electronic target to test the performance of the instrument.

[0087] Among them, the target 1020 is installed on the rotating shaft 410 of the liquid outlet rotary joint through the fastener 1010. The fastener 1010 can be a screw, which rotates with the rotating shaft 410. The movement trajectory or direction of the target 1020 is consistent with that of the core shaft 620. The movement trajectory of the light reflected by the reflective structure is the movement trajectory of the core shaft 620. The trajectory is imaged in the image acquisition device 1030, and the processor 1050 processes the trajectory to form a circle or point to a certain direction to display the guidance angle.

[0088] The image collector 1030 may be a camera, through which the motion trajectory can be imaged.

[0089] The laser generator 1031 emits auxiliary laser of a specific wavelength band and frequency under the control of the laser driving circuit to eliminate the interference of ambient light.

[0090] like Figure 7 As shown, the processor 1050 is a computer, which first eliminates the interference of sunlight to ensure that the system can measure normally without direct sunlight. Then the image is processed as follows:

[0091] 1. Canny filtering detects edges in images and has the advantages of high accuracy and low false alarm rate.

[0092] 2. Perform dynamic binarization on the image to reduce the impact of different directions of sunlight and different uniformity on the measurement.

[0093] 3. Perform graphic morphological processing on the binarized image information to accurately detect the target 1020 center with high precision.

[0094] 4. Perform nonlinear elimination processing on the image information at the center of target 1020 to improve detection accuracy.

[0095] 5. Perform data conversion on the image after nonlinear elimination processing to extract the position data of the center of the target 1020 in the image coordinate system.

[0096] 6. Send the position data to the human-machine interface software, which will generate and display various reports, curves and angle diagrams.

[0097] In this embodiment, the image processing host can record the position information of the target point at least once every 7 mS, thereby achieving high-speed data processing.

[0098] like Figure 5 As shown, the adjustment frame 1040 includes a base, an adjustment rod and a support rod. The adjustment rod is slidably set on the base along the width direction of the bracket 10, the support rod is slidably set on the adjustment rod along the height direction of the bracket 10, the support rod extends along the length direction of the bracket 10 toward one side of the target 1020, and the image collector 1030 and the laser generator 1031 are slidably set on the support rod along the axial direction of the support rod.

[0099] Specifically, the image collector 1030 and the laser generator 1031 are arranged on the adjustment frame 1040 to adjust the position between the target 1020 in the up-down, left-right, front-back directions, so that the center of the target is imaged near the center position of the camera image coordinate system in the image acquisition system, and the camera CCD plane is approximately perpendicular to the center axis of the drill bit.

[0100] In this embodiment, angle measurement and display: when the instrument is in a straight state, the first driving member 20 drives the shell 610 to rotate, and the biasing mechanism built into the rotating guide mechanism 60 causes the core shaft to form a fixed inclination angle with the axis of the shell, so that the core shaft makes a circular motion relative to the axis of the shell, and the trajectory of the reflective points scattered by the reflective structure of the target 1020 forms a circle; the camera records the trajectory of the reflective point at the center of the target 1020, and the computer measures and calculates the position and trajectory radius of the reflective point to determine the center of the trajectory; with the center of the trajectory as the origin, a rectangular coordinate system is established to form an electronic target, and the origin is the axis of the shell 610.

[0101] When the instrument is guiding, the first driving member 20 drives the housing 610 to rotate in a first direction, and the biasing mechanism connected to the core shaft 620 rotates in a second direction opposite to the first direction under the drive of the built-in driving member, and the rotation speed is equal to the rotation speed in the first direction, offsetting the revolution effect of the biasing mechanism, so that the core shaft 620 is stationary relative to the earth and points to a certain direction, the position and angle of the reflective point are displayed on the electronic target, and the test software outputs the guidance angle.

[0102] Embodiment 2

[0103] This embodiment provides a measurement method, which is applied to a rotary steerable instrument ground test device. The rotary steerable instrument ground test device is the rotary steerable instrument ground test device in Embodiment 1. The rotary steerable instrument ground test device has a first steerable mode and a second linear mode, such as Figure 8 As shown, the measurement methods include:

[0104] Obtaining a mode instruction, and executing the first mode or the second mode according to the mode instruction;

[0105] The first driving member 20 drives the housing 610 to rotate;

[0106] When the second mode is executed, the first driving member 20 drives the output end of the core shaft 620 to move in a circular motion relative to the axis of the housing 610, and the guide angle measuring mechanism 100 obtains the reflected light to form an electronic target;

[0107] When the first mode is executed, the output end of the spindle 620 is stationary relative to the earth, and the guidance angle measuring mechanism 100 obtains the guidance angle.

[0108] The first mode is to simulate the directional drilling state during the drilling process, and the direction of the drill simulator 80 is achieved by adjusting the direction of the mandrel 620, thereby simulating the scene of drilling in a preset direction. The second mode is to simulate the scene of the straight drilling state.

[0109] In this embodiment, when the first mode is executed, it includes:

[0110] The first driving member 20 drives the housing 610 of the rotary guide mechanism 60 to rotate along a first direction;

[0111] The built-in drive member drives the biasing mechanism and the spindle to rotate in a second direction opposite to the first direction, and the speed of the second direction is equal to the speed of the first direction, thereby offsetting the revolution effect of the biasing mechanism, making the biasing mechanism stationary relative to the earth, and thus maintaining the spindle controlled by the biasing mechanism in a predetermined position.

[0112] In this embodiment, when the first mode is executed, since the biasing mechanism is stationary relative to the earth, the core shaft controlled by the biasing mechanism and having a fixed inclination angle with the shell points to a predetermined orientation, the trajectory of the core shaft output end forms a point, and the guidance angle measuring mechanism obtains the guidance angle.

[0113] In this embodiment, when the second mode is executed, it includes:

[0114] The first driving member 20 drives the housing 610 of the rotary guide mechanism 60 to rotate along a first direction;

[0115] The built-in drive member drives the biasing mechanism and the spindle to rotate in a second direction opposite to the first direction, and the rotation speed maintains a certain rotation speed difference with the rotation speed in the first direction, and the biasing mechanism revolves relative to the housing 610, thereby causing the biasing mechanism to control the spindle to perform a circular motion relative to the axis of the housing;

[0116] In this embodiment, when the second mode is executed, since the biasing mechanism revolves relative to the outer shell 610, the core shaft controlled by the biasing mechanism and having a fixed inclination angle with the outer shell makes a circular motion relative to the axis line of the outer shell, and the trajectory of the output end of the core shaft forms a circle. The guide angle measuring mechanism obtains the reflected light to form an electronic target.

[0117] Embodiment 3

[0118] This embodiment provides a control method, which is applied to a rotary steerable instrument ground test device, wherein the rotary steerable instrument ground test device is the rotary steerable instrument ground test device in the first embodiment, such as Fig. 9 As shown, the control method includes:

[0119] Obtaining an action instruction and executing the first driving member 20 to drive the housing 610 of the rotary guide mechanism 60 to rotate along a first direction;

[0120] The execution loading mechanism 70 applies drilling pressure to the drill simulator 80;

[0121] Execute circulating water with preset flow rate;

[0122] The action instruction is obtained and the built-in driving component is executed to drive the biasing mechanism to rotate in a second direction opposite to the first direction, and the rotation speed is equal to the rotation speed in the first direction.

[0123] Execute Get guide angle.

[0124] The preset flow rate can be adaptively adjusted as needed, that is, the flow rate of the circulating water can be adjusted by adjusting the circulating liquid supply device.

[0125] In this embodiment, the first driving member 20 drives the rotary steering mechanism 60 to rotate, the loading mechanism 70 applies drilling pressure to the drill simulator 80, circulates water at a preset flow rate, and obtains the steering angle. This can realize a complete simulation of ground drilling, as well as performance testing and steering angle testing.

[0126] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0127] The ground test device of the rotary steerable instrument of the present application can simulate the drilling conditions of the instrument under laboratory conditions, rotate the instrument, circulate water and increase drilling pressure, realize simulated ground drilling and obtain the movement trajectory of the core shaft 620 and the guidance angle of the core shaft 620 through the guidance angle measurement mechanism 100, thereby realizing the performance test of the instrument.

[0128] The rotary steering mechanism 60 provided in the present application can achieve the effect of simulating the steering during the drilling process, and the present application realizes the rotary steering of the drill bit during the drilling process through the drill bit simulator 80, thereby realizing the simulation of the steering to perform the test of the rotational steering.

[0129] The present application sets up a steering angle measuring mechanism 100 to obtain the rotation trajectory of the core shaft 620 during straight drilling, and can also obtain the steering angle during directional drilling for use in steering testing and performance testing.

[0130] In the present application, the seal 440 is set to seal and isolate the bearing 430 from the liquid storage chamber 450, thereby separating the lubricating oil at the bearing 430 and the water inside the liquid storage chamber 450, thereby achieving oil-water separation without affecting the circulation of circulating water or the lubrication of the bearing 430.

[0131] The present application sets a loading mechanism 70 for applying drilling pressure to the drill simulator 80 to simulate a real drilling scenario and verify the reliability of the internal structure of the instrument. The present application can adjust the magnitude of the drilling pressure through the setting of the loading mechanism 70, thereby improving the flexibility of the structural setting and simulating a multi-scenario drilling environment.

[0132] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all 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.

[0133] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0134] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0135] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ground test device for a rotary steerable instrument, characterized in that: include: A bracket (10) and a first driving member (20) arranged on the bracket (10); A rotary guide mechanism (60) comprising a housing (610) and a core shaft (620), wherein the first driving member (20) is drivingly connected to the housing (610), an input end of the core shaft (620) is arranged inside the housing (610), and an output end of the core shaft (620) extends toward a side away from the first driving member (20) and is eccentrically arranged with respect to the housing (610); A drill simulator (80), the output end of the mandrel (620) being connected to the drill simulator (80); The guide angle measuring mechanism (100) is arranged on a side of the drill simulator (80) away from the first driving member (20) and is used to obtain the guide angle of the drill simulator (80).

2. The rotary steerable instrument ground test device according to claim 1, characterized in that: The rotary steerable instrument ground test device further comprises a rotary joint (40), wherein one of the rotary joints (40) is a liquid inlet rotary joint, and the other is a liquid outlet rotary joint. The liquid inlet rotary joint is arranged between the first driving member (20) and the rotary guide mechanism (60), the housing (610) and the core shaft (620) form a first liquid passage extending axially, and the liquid inlet rotary joint is in communication with the first liquid passage; The liquid outlet rotary joint is arranged at one end of the drill simulator (80) away from the first driving member (20), a part of the guide angle measuring mechanism (100) is arranged on the liquid outlet rotary joint, the drill simulator (80) has a second liquid passage connected to the first liquid passage, the second liquid passage is connected to the liquid outlet rotary joint, and the liquid inlet rotary joint, the first liquid passage, the second liquid passage and the liquid outlet rotary joint form a circulation channel for the liquid.

3. The rotary steerable instrument ground test device according to claim 2, characterized in that: The rotary joint (40) comprises: A rotating shaft (410) having an axially extending flow channel (420), wherein the rotating shaft (410) is rotationally connected to the first driving member (20) or the drill simulator (80); A housing (470), the housing (470) being arranged on the rotating shaft (410) via a bearing (430), the housing (470) and the rotating shaft (410) forming a liquid storage chamber (450) arranged on the outer peripheral side of the rotating shaft (410), the rotating shaft (410) having a through hole (460), the flow channel (420) being connected to the liquid storage chamber (450) via the through hole (460): A hose (90), the hose (90) being in communication with the liquid storage chamber (450).

4. The rotary steerable instrument ground test device according to claim 3, characterized in that: The rotary joint (40) further comprises: A sealing member (440) is disposed between the housing (470) and the rotating shaft (410), and the bearings (430) are disposed on both sides of the liquid storage chamber (450) along the axial direction of the rotating shaft (410). The sealing member (440) is disposed between the bearings (430) and the liquid storage chamber (450) to isolate the bearings (430) from the liquid storage chamber (450).

5. The rotary steerable instrument ground test device according to claim 1, characterized in that: The rotary guide mechanism (60) further includes a built-in biasing mechanism disposed inside the shell (610), one end of the core shaft (620) is controlled by the biasing mechanism, and the biasing mechanism causes the core shaft (620) to form a fixed inclination angle with the axis of the shell. The rotary guide mechanism (60) further includes a built-in driving component disposed inside the shell (610), the built-in driving component is connected to the biasing mechanism, and the built-in driving component provides a driving force for the rotation of the biasing mechanism, and further the built-in driving component provides a driving force for the rotation of the core shaft (620).

6. The rotary steerable instrument ground test device according to claim 1, characterized in that: The rotary steering instrument ground test device further comprises a support member (50), wherein the support member (50) is arranged on the bracket (10), and the rotary steering mechanism (60) is supported on the support member (50).

7. The rotary steerable instrument ground test device according to any one of claims 1 to 6, characterized in that: The rotary steerable instrument ground test device further comprises a loading mechanism (70), wherein the loading mechanism (70) is arranged on the support (10), and the loading mechanism (70) has a pushing structure (730) for providing drilling pressure, wherein the pushing structure (730) moves along the length direction of the support (10) toward or away from the drill bit simulator (80).

8. The rotary steerable instrument ground test device according to claim 7, characterized in that: The loading mechanism (70) comprises: A second driving member (710) is arranged on the bracket (10); A guide rod (720), wherein the second driving member (710) is drivingly connected to the pushing structure (730), and the pushing structure (730) is arranged on the guide rod (720); A support seat (740) is arranged on the bracket (10), and the support seat (740) supports the guide rod (720).

9. The rotary steerable instrument ground test device according to claim 7, characterized in that: The drill simulator (80) comprises: A connecting shaft (820), one end of the connecting shaft (820) being connected to the core shaft (620); A thrust spherical roller bearing (830) sleeved on the connecting shaft (820); A ball head (840) and a ball seat (850), wherein the ball head (840) is mounted on the connecting shaft (820) via the thrust spherical roller bearing (830), the pushing structure (730) has a mounting groove arranged on the outer peripheral side of the connecting shaft (820), the ball seat (850) is mounted in the mounting groove, and the ball head (840) and the ball seat (850) cooperate to form a spherical fit.

10. The rotary steerable instrument ground test device according to any one of claims 1 to 6, characterized in that: The guide angle measuring mechanism (100) comprises: A target (1020) is arranged on a side of the liquid outlet rotary joint of the rotary steerable instrument ground test device away from the first drive member (20), and the target (1020) has a reflective structure; An image collector (1030) and a laser generator (1031), wherein the laser generator (1031) is used to emit light toward the target (1020), and the image collector (1030) receives light reflected by the reflective structure; An adjustment frame (1040), the image collector (1030) and the laser generator (1031) being arranged on the adjustment frame (1040); A processor (1050), the processor (1050) being connected to the image collector (1030) by signal, and being used to output the guidance angle.

11. The rotary steerable instrument ground test device according to claim 10, characterized in that: The adjustment frame (1040) comprises: Base; An adjustment rod, slidably arranged on the base along the width direction of the bracket (10); a support rod, slidably disposed on the adjustment rod along the height direction of the support (10), the support rod extending along the length direction of the support (10) toward one side of the target (1020); The image collector (1030) and the laser generator (1031) are slidably arranged on the support rod along the axial direction of the support rod.

12. A measurement method, characterized in that: A rotary steerable instrument ground test device applied to any one of claims 1 to 11, wherein the rotary steerable instrument ground test device has a first steerable mode and a second straight line mode, and the measuring method comprises: Obtaining a mode instruction, and executing the first mode or the second mode according to the mode instruction; executing the first driving member (20) to drive the housing (610) to rotate; When the second mode is executed, the first driving member (20) drives the output end of the core shaft (620) to move in a circular motion relative to the axis of the housing (610), and the guide angle measuring mechanism (100) acquires reflected light to form an electronic target; When the first mode is executed, the output end of the spindle (620) is stationary relative to the earth, and the guidance angle measurement mechanism (100) obtains the guidance angle.

13. The measuring method according to claim 12, characterized in that: When executing the first mode, it includes: Executing the first driving member (20) to drive the housing (610) of the rotary guide mechanism (60) to rotate along a first direction; The built-in driving member of the rotary guide mechanism (60) drives the biasing mechanism and the core shaft (620) to rotate in a second direction opposite to the first direction, with a rotation speed equal to the rotation speed in the first direction.

14. The measuring method according to claim 12, characterized in that: When the second mode is executed, it includes: Executing the first driving member (20) to drive the housing (610) of the rotary guide mechanism (60) to rotate along a first direction; The built-in driving member of the rotary guide mechanism (60) drives the biasing mechanism and the core shaft (620) to rotate in a second direction opposite to the first direction, with the rotation speed maintaining a certain rotation speed difference with the rotation speed in the first direction.

15. A control method, characterized in that: The rotary steerable instrument ground test device applied to any one of claims 1 to 11, wherein the control method comprises: Acquiring an action instruction and executing a first driving member (20) to drive the housing (610) of the rotary guide mechanism (60) to rotate along a first direction; The execution loading mechanism (70) applies drilling pressure to the drill simulator (80); Execute circulating water with preset flow rate; Obtaining an action instruction and executing the built-in driving component to drive the biasing mechanism to rotate in a second direction opposite to the first direction, with a rotation speed equal to the rotation speed in the first direction; Execute Get guide angle.

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