A shale oil well wall drilling fluid seepage pressure simulation detection device

Abstract

The present invention belongs to the technical field of pressure simulation detection, and in particular, relates to a shale oil well wall drilling fluid seepage pressure simulation detection device, including a base, and also including: a support transfer mechanism, fixedly installed on the base, used to continuously transfer multiple samples to be detected; multiple loading and fixing mechanisms, equidistantly fixedly installed on the support transfer mechanism, and multiple loading and fixing mechanisms are arranged in a circular distribution. The present invention can simulate the fluid pressure changes during the seepage of the well wall rock drilling fluid in the actual formation, and judge the permeability of the shale core in combination with the time when the pressure sensor monitors the fluid pressure, and then in the actual drilling process, it can timely detect whether the formation pressure is abnormal according to the fluid pressure changes, and can prevent accidents by adjusting and controlling the fluid pressure of the drilling fluid to ensure the safety of personnel and equipment. It can also reduce the leakage of drilling fluid and reduce the risk of pollution to the environment, meeting the requirements of green mining.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure simulation detection, and in particular relates to a shale oil well wall drilling fluid seepage pressure simulation detection device. Background Art

[0002] During shale oil drilling, the fluid pressure of the drilling fluid is crucial to the stability of the wellbore. Excessive fluid pressure will exceed the anti-permeability capacity of the shale oil wellbore, thereby causing abnormal formation pressure. Therefore, it is necessary to monitor and adjust the pressure of the drilling fluid in real time to ensure the smooth progress of the drilling operation and improve drilling efficiency.

[0003] However, the existing method of controlling drilling fluid pressure based on three pressure profiles cannot meet the requirements due to the local inaccuracy of the three pressure profiles of shale oil layers. Improper control of drilling fluid pressure can lead to well wall collapse or drilling fluid leakage, which in turn causes safety accidents. It is impossible to accurately adjust the fluid pressure of the drilling fluid according to the actual permeability of the shale well wall, affecting actual operation and use. Summary of the invention

[0004] The purpose of the present invention is to provide a shale oil well wall drilling fluid seepage pressure simulation detection device in view of the above problems.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a shale oil well wall drilling fluid seepage pressure simulation detection device, including a base, and also including:

[0006] A supporting transfer mechanism is fixedly mounted on the base and is used to continuously transfer a plurality of samples to be tested;

[0007] A plurality of loading and fixing mechanisms are equidistantly fixedly mounted on the supporting and transferring mechanism, and the plurality of loading and fixing mechanisms are arranged in a ring-shaped distribution;

[0008] A pressure supply detection mechanism, arranged on one side of the support transfer mechanism, for providing a fluid detection pressure for the sample to be detected;

[0009] The detection force adjustment mechanism is fixedly mounted on the supply pressure detection mechanism and is used to adjust the detection pressure of the supply pressure detection mechanism;

[0010] The test result recording mechanism is fixedly mounted on the base, and is used to receive the test result information obtained by the cooperation of the loading fixing mechanism and the pressure supply testing mechanism, and to display it intuitively.

[0011] In the above-mentioned shale oil well wall drilling fluid seepage pressure simulation detection device, the support and transfer mechanism includes a U-shaped support plate fixedly mounted on the upper end of the base, the horizontal part of the U-shaped support plate and the upper end of the base are rotatably connected with a support column through a bearing, and the upper end of the base is fixedly mounted with a motor rotating assembly for driving the support column to rotate, and the upper end of the support column is fixedly connected with a rotating disk, and the surface of the rotating disk is evenly fixed with a plurality of insertion cylinders arranged in a ring shape.

[0012] In the above-mentioned shale oil well wall drilling fluid seepage pressure simulation detection device, the loading and fixing mechanism includes a loading cylinder fixedly inserted in the insertion cylinder, a loading cover is installed at the upper end of the loading cylinder, positioning cylinders are fixedly installed on the opposite sides of the loading cylinder and the loading cover, and sealing rubber rings arranged in the positioning cylinder are fixedly installed on the inner sides of the loading cylinder and the loading cover. A connecting cylinder is fixedly inserted on the opposite sides of the loading cylinder and the loading cover, and a plurality of pressure sensors are symmetrically installed on the side wall of the loading cylinder, and the loading cylinder and the loading cover are fixedly connected by multiple groups of symmetrically arranged locking mechanisms.

[0013] In the above-mentioned shale oil well wall drilling fluid seepage pressure simulation detection device, the pressure supply detection mechanism includes a U-shaped bracket fixedly mounted on the upper end of the base, and two electric push rods are symmetrically fixedly sleeved at both ends of the U-shaped bracket, and the output ends of the two electric push rods are fixedly connected to the same pressure plate, and an insertion tube is fixedly sleeved on the pressure plate, and the insertion tube and the connecting tube are sealed and sleeved, and a circulation pipe is installed between the two insertion tubes, and a liquid storage tank and a circulation pump are installed on the circulation pipe, the liquid storage tank is fixedly mounted on the upper end of the base, and the circulation pump is fixedly mounted outside the U-shaped bracket, and a plurality of trigger switches corresponding to the loading fixing mechanism are fixedly mounted on the outer side of the rotating disc, and a pressing protrusion arranged opposite to the trigger switch is fixedly mounted on the inner side of the vertical part of the U-shaped bracket.

[0014] In the above-mentioned shale oil well wall drilling fluid seepage pressure simulation detection device, the detection force adjustment mechanism includes an adjusting shell fixedly mounted on the outer wall of the U-shaped bracket, an adjusting screw is rotatably connected inside the adjusting shell, an adjusting motor for driving the adjusting screw to rotate is fixedly mounted on the outer wall of the adjusting shell, an adjusting block is threadedly sleeved on the rod wall of the adjusting screw, one end of the adjusting block is set as an arc head structure, and a plurality of pressure adjustment switches arranged side by side are equidistantly fixedly mounted on the inner wall of the adjusting shell.

[0015] In the above-mentioned shale oil well wall drilling fluid seepage pressure simulation detection device, the detection result recording mechanism includes an electric roller assembly fixedly mounted on the upper end of the base, a canvas is wound around the electric roller assembly, a longitudinal electric slide rail is fixedly mounted on the upper end of the base, a movable plate is fixedly mounted on the upper end of the slider in the longitudinal electric slide rail, two self-sensing push mechanisms are symmetrically fixedly mounted on the upper end of the movable plate, a mounting plate is fixedly mounted on the upper output end of the self-sensing push mechanism, and a marking pen is fixedly sleeved on the surface of the mounting plate The tip of the marking pen is in contact with the canvas, a dual-axis motor is fixedly installed in the middle position of the upper end of the movable plate, an L-shaped extension plate is fixedly installed on the outer wall of the lower end of the self-sensing pushing mechanism, a through hole is opened on the lower end side wall of the L-shaped extension plate, and a linkage shaft is rotatably sleeved in the corresponding through hole through a bearing, one end of the linkage shaft is transmission-connected to the lower input end of the self-sensing pushing mechanism through a bevel gear assembly, the other end of the linkage shaft is fixedly connected to a transmission permanent magnet plate, and both end output ends of the dual-axis motor are fixedly connected to transmission electromagnetic plates.

[0016] In the above-mentioned shale oil well wall drilling fluid seepage pressure simulation detection device, the locking mechanism includes a locking block installed at the connection between the loading cylinder and the loading cover, the outer walls of the loading cylinder and the loading cover are fixedly provided with T-shaped clamping blocks corresponding to the locking block, the side wall of the locking block is symmetrically provided with two T-shaped clamping grooves matching and clamping with the T-shaped clamping block, the locking block and the T-shaped clamping block are fixedly connected by fixing bolts, the upper end of the loading cylinder is also fixedly provided with a sealing connecting plate, the lower end of the loading cover is provided with a sealing connecting groove matching and plugging with the sealing connecting plate, and the sealing connecting plate and the sealing connecting groove are both annular structures.

[0017] In the above-mentioned shale oil well wall drilling fluid seepage pressure simulation detection device, the self-sensing push mechanism includes a push shell, one side of the inner wall of the push shell is rotatably connected with a vertically arranged transmission screw, the rod wall of the transmission screw is threadedly sleeved with a push plate, the upper end of the push plate is fixedly connected with a push rod, the upper end of the push rod passes through the upper end of the push shell and is fixedly connected to the lower end of the mounting plate, and a reset confirmation switch arranged opposite to the push plate is fixedly installed at the bottom of the inner wall of the push shell.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Through the support and transfer mechanism, loading and fixing mechanism, pressure supply detection mechanism and locking mechanism, the cylindrical core sample can be quickly installed and fixed, and the drilling fluid is introduced into the through hole in the middle of the sample to provide a certain fluid pressure, which can simulate the fluid pressure change in the process of drilling fluid seepage in the well wall rock of the actual formation. The permeability of the shale core can be judged by combining the time when the pressure sensor monitors the fluid pressure, and then in the actual drilling process, it can be found out whether the formation pressure is abnormal in time according to the fluid pressure change. It can ensure that the fluid pressure change of the actual formation can be accurately judged by accurately measuring the fluid pressure of the drilling fluid, and then the accident can be prevented by adjusting and controlling the fluid pressure of the drilling fluid to ensure the safety of personnel and equipment, and it can also reduce the leakage of drilling fluid and reduce the risk of environmental pollution, which meets the requirements of green mining;

[0020] 2. Through the detection force adjustment mechanism and pressure supply detection mechanism, the staff can observe the change law of the permeability of the core sample under different pressure conditions based on different test pressures, which is helpful to more comprehensively evaluate the permeability performance of the core and provide more comprehensive detection performance;

[0021] 3. Through the test result recording mechanism and self-sensing push mechanism, the test results can be displayed in intuitive line segments, so that the staff can quickly obtain key information, and can intuitively reflect the changing trend of the test results with the variables, which is convenient for direct comparison of the test results of multiple samples, making the detection work more convenient and quick.

[0022] To sum up: the present invention can simulate the fluid pressure changes during the seepage of drilling fluid in the well wall rock of the actual formation, and judge the permeability of the shale core in combination with the time when the pressure sensor monitors the fluid pressure, and then in the actual drilling process, it can promptly discover whether the formation pressure is abnormal according to the fluid pressure changes, and can ensure that by accurately measuring the fluid pressure of the drilling fluid, the fluid pressure changes of the actual formation can be accurately judged, and then by adjusting and controlling the fluid pressure of the drilling fluid to prevent accidents, ensure the safety of personnel and equipment, and can also reduce the leakage of drilling fluid and reduce the risk of environmental pollution, which meets the requirements of green mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional structural schematic diagram of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the support and transfer mechanism of the present invention.

[0025] Figure 3 It is a schematic cross-sectional structural diagram of the loading and fixing mechanism of the present invention.

[0026] Figure 4It is a structural schematic diagram of the pressure supply detection mechanism of the present invention.

[0027] Figure 5 It is a schematic cross-sectional structural diagram of the detection force adjustment mechanism of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the detection result recording mechanism of the present invention.

[0029] Figure 7 It is a structural schematic diagram of the locking mechanism of the present invention.

[0030] Figure 8 It is a schematic cross-sectional structural diagram of the self-sensing push mechanism of the present invention.

[0031] Fig. 9 yes Figure 8 A schematic diagram of the enlarged structure of part A.

[0032] In the figure: 1 base, 2 support transfer mechanism, 21 U-shaped support plate, 22 support column, 23 motor rotating assembly, 24 rotating disc, 25 insertion cylinder, 3 loading fixing mechanism, 31 loading cylinder, 32 loading cover, 33 positioning cylinder, 34 sealing rubber ring, 35 connecting cylinder, 36 pressure sensor, 4 supply pressure detection mechanism, 41 U-shaped bracket, 42 electric push rod, 43 pressure plate, 44 insertion tube, 45 circulation tube, 46 liquid storage tank, 47 circulation pump, 48 trigger switch, 49 pressing bump, 5 detection force adjustment mechanism, 51 adjustment shell, 52 adjustment screw, 53 adjustment motor, 54 adjustment block, 55 pressure adjustment switch, 6 detection result recording mechanism, 61 electric roller assembly, 62 canvas, 63 longitudinal electric slide rail, 64 moving plate, 65 mounting plate, 66 marking pen, 67 dual-axis motor, 68 L-shaped extension plate, 69 linkage shaft, 610 bevel gear assembly, 611 transmission permanent magnet plate, 612 transmission electromagnetic plate, 7 locking mechanism, 71 locking block, 72 T-shaped clamping block, 73 T-shaped clamping groove, 74 sealing connecting plate, 75 sealing connecting groove, 8 self-sensing push mechanism, 81 push shell, 82 transmission screw, 83 push plate, 84 push rod, 85 reset confirmation switch. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] like Figure 1-Figure 9 As shown, a shale oil well wall drilling fluid seepage pressure simulation detection device includes a base 1 and also includes:

[0035] The support and transfer mechanism 2 is fixedly mounted on the base 1 and is used for continuously transferring a plurality of samples to be tested. The support and transfer mechanism 2 comprises a U-shaped support plate 21 fixedly mounted on the upper end of the base 1. A support column 22 is rotatably connected to the horizontal portion of the U-shaped support plate 21 and the upper end of the base 1 via a bearing. A motor rotating assembly 23 for driving the support column 22 to rotate is fixedly mounted on the upper end of the base 1. A rotating disc 24 is fixedly connected to the upper end of the support column 22. A plurality of inserting cylinders 25 arranged in an annular manner are evenly fixedly sleeved on the surface of the rotating disc 24.

[0036] A plurality of loading fixing mechanisms 3 are equidistantly fixedly installed on the supporting and transferring mechanism 2, and the plurality of loading fixing mechanisms 3 are distributed in a ring shape, the loading fixing mechanisms 3 include a loading cylinder 31 fixedly inserted in the insertion cylinder 25, a loading cover 32 is installed at the upper end of the loading cylinder 31, a positioning cylinder 33 is fixedly installed on the opposite side of the loading cylinder 31 and the loading cover 32, a sealing rubber ring 34 arranged in the positioning cylinder 33 is fixedly installed on the inner side of the loading cylinder 31 and the loading cover 32, a connecting cylinder 35 is fixedly inserted on the opposite side of the loading cylinder 31 and the loading cover 32, a plurality of pressure sensors 36 are symmetrically installed on the side wall of the loading cylinder 31, and the loading cylinder 31 and the loading cover 32 are fixedly connected by a plurality of groups of symmetrically arranged locking mechanisms 7.

[0037] The pressure supply detection mechanism 4 is arranged on one side of the supporting transfer mechanism 2, and is used for providing fluid detection pressure for the sample to be detected. The pressure supply detection mechanism 4 includes a U-shaped bracket 41 fixedly mounted on the upper end of the base 1, and two electric push rods 42 are symmetrically fixedly sleeved at both ends of the U-shaped bracket 41. The output ends of the two electric push rods 42 are fixedly connected to the same pressure plate 43, and an insertion tube 44 is fixedly sleeved on the pressure plate 43. The insertion tube 44 and the connecting tube 35 are sealed and sleeved. A circulation pipe 45 is installed between the two insertion tubes 44, and a liquid storage tank 46 and a circulation pump 47 are installed on the circulation pipe 45. The liquid storage tank 46 is fixedly mounted on the upper end of the base 1, and the circulation pump 47 is fixedly mounted outside the U-shaped bracket 41. A plurality of trigger switches 48 corresponding to the loading fixing mechanism 3 are fixedly mounted on the outer side of the rotating disk 24, and a pressing protrusion 49 arranged opposite to the trigger switch 48 is fixedly mounted on the inner side of the vertical portion of the U-shaped bracket 41.

[0038] The detection force adjustment mechanism 5 is fixedly mounted on the supply pressure detection mechanism 4 and is used for adjusting the detection pressure of the supply pressure detection mechanism 4. The detection force adjustment mechanism 5 comprises an adjustment shell 51 fixedly mounted on the outer wall of the U-shaped bracket 41. An adjustment screw 52 is rotatably connected inside the adjustment shell 51. An adjustment motor 53 for driving the adjustment screw 52 to rotate is fixedly mounted on the outer wall of the adjustment shell 51. An adjustment block 54 is threadedly sleeved on the rod wall of the adjustment screw 52. One end of the adjustment block 54 is set as an arc head structure. A plurality of pressure adjustment switches 55 arranged side by side are equidistantly fixedly mounted on the inner wall of the adjustment shell 51.

[0039] The detection result recording mechanism 6 is fixedly mounted on the base 1, and is used to receive the detection result information obtained by the loading fixing mechanism 3 and the pressure supply detection mechanism 4, and display it intuitively. The detection result recording mechanism 6 includes an electric roller assembly 61 fixedly mounted on the upper end of the base 1, and a canvas 62 is wound around the electric roller assembly 61. A longitudinal electric slide rail 63 is fixedly mounted on the upper end of the base 1, and a moving plate 64 is fixedly mounted on the upper end of the slider in the longitudinal electric slide rail 63. Two self-sensing push mechanisms 8 are symmetrically fixedly mounted on the upper end of the moving plate 64. A mounting plate 65 is fixedly mounted on the upper output end of the self-sensing push mechanism 8. The mounting plate 6 5 is fixedly sleeved with a marking pen 66, the tip of the marking pen 66 is in contact with the canvas 62, a dual-axis motor 67 is fixedly installed at the middle position of the upper end of the movable plate 64, an L-shaped extension plate 68 is fixedly installed on the outer wall of the lower end of the self-sensing pushing mechanism 8, a through hole is opened on the lower end side wall of the L-shaped extension plate 68, and a linkage shaft 69 is rotatably sleeved in the corresponding through hole through a bearing, one end of the linkage shaft 69 is transmission-connected to the lower input end of the self-sensing pushing mechanism 8 through a bevel gear assembly 610, the other end of the linkage shaft 69 is fixedly connected to a transmission permanent magnet plate 611, and both end output ends of the dual-axis motor 67 are fixedly connected to a transmission electromagnetic plate 612.

[0040] The locking mechanism 7 includes a locking block 71 installed at the connection between the loading cylinder 31 and the loading cover 32. The outer walls of the loading cylinder 31 and the loading cover 32 are fixedly provided with T-shaped clamping blocks 72 corresponding to the locking block 71. The side wall of the locking block 71 is symmetrically provided with two T-shaped clamping grooves 73 matching and clamping with the T-shaped clamping block 72. The locking block 71 and the T-shaped clamping block 72 are fixedly connected by fixing bolts. A sealing connecting plate 74 is also fixedly installed on the upper end of the loading cylinder 31. A sealing connecting groove 75 matching and plugging with the sealing connecting plate 74 is provided at the lower end of the loading cover 32. Both the sealing connecting plate 74 and the sealing connecting groove 75 are annular structures.

[0041] The self-sensing push mechanism 8 includes a push shell 81, one side of the inner wall of the push shell 81 is rotatably connected to a vertically arranged transmission screw 82, the rod wall of the transmission screw 82 is threadedly sleeved with a push plate 83, the upper end of the push plate 83 is fixedly connected to a push rod 84, the upper end of the push rod 84 passes through the upper end of the push shell 81, and is fixedly connected to the lower end of the mounting plate 65, and a reset confirmation switch 85 arranged opposite to the push plate 83 is fixedly installed at the bottom of the inner wall of the push shell 81.

[0042] A PLC controller is also fixedly mounted on the upper end of the base 1, and the PLC controller is electrically connected to the supporting and transferring mechanism 2, the loading and fixing mechanism 3, the supply pressure detection mechanism 4, the detection force adjustment mechanism 5 and the detection result recording mechanism 6 respectively.

[0043] The operating principle of the present invention is described as follows: a cylindrical core is cut out of the well wall, and a through hole is opened in the middle of the core. The core is first placed in the loading tube 31, and the lower end of the core is arranged inside the positioning tube 33. Then, the loading cover 32 is quickly connected to the loading tube 31 through the matching plug-in of the sealing connection plate 74 and the sealing connection groove 75, and the top of the core is limited. Through the matching clamping action of the T-shaped clamping block 72 and the T-shaped clamping groove 73, a plurality of locking blocks 71 quickly and firmly connect the loading tube 31 and the loading cover 32 together, and then the locking block 71 is limited and locked by bolts. The sealing rubber ring 34 provided in the loading tube 31 and the loading cover 32 can be sealed against the end of the core, so that the connecting tube 35 is connected to the through hole in the middle of the core.

[0044] The motor rotating assembly 23 drives the support column 22 to drive the rotating disc 24 to rotate, so that the loading cylinder 31 moves to the detection position of the pressure supply detection mechanism 4. At this time, the trigger switch 48 on the outer wall of the rotating disc 24 is pressed and pushed by the protrusion 49 to trigger. The PLC controller first controls the electric push rod 42 to push the pressure plate 43 to move, so that the insertion cylinder 44 is sealed and inserted into the connecting cylinder 35, so that the circulation pipe 45 is connected to the loading cylinder 31. The PLC controller then controls the circulation pump 47 to work. The circulation pump 47 cooperates with the circulation pipe 45 to transport the drilling fluid in the liquid storage tank 46 to the loading cylinder 31 at a certain pressure, and passes through the through hole in the middle of the core. When the drilling fluid is poured on the core, the PLC controller controls the timing mechanism to start timing work until the pressure sensor 36 on the side wall of the loading cylinder 31 detects fluid pressure, indicating that the drilling fluid has penetrated through the core to the outside of the core. At this time, the PLC controller controls the timing mechanism to stop timing work. The length of time that the pressure sensor 36 detects fluid pressure can be used to judge The permeability of the broken shale core, specifically, the shorter the interval time when the pressure sensor 36 detects fluid pressure, the better the permeability of the core, and vice versa, when the pressure sensor 36 detects fluid pressure, the longer the interval time, the worse the permeability of the core, the cylindrical core sample can be quickly installed and fixed, and drilling fluid is introduced into the through hole in the middle of the sample to provide a certain fluid pressure, which can simulate the fluid pressure change in the process of drilling fluid seepage in the well wall rock of the actual formation, and the permeability of the shale core can be judged in combination with the time when the pressure sensor 36 monitors the fluid pressure, and then in the actual drilling process, it can be timely discovered whether the formation pressure is abnormal according to the fluid pressure change, and it can ensure that the actual formation fluid pressure change can be accurately judged by accurately measuring the fluid pressure of the drilling fluid, and then the accident can be prevented by adjusting and controlling the fluid pressure of the drilling fluid to ensure the safety of personnel and equipment, and it can also reduce the leakage of drilling fluid and reduce the risk of environmental pollution, which meets the requirements of green mining;

[0045] After the core in the current loading tube 31 is tested, the PLC controller first controls the electric push rod 42 to drive the insertion tube 44 to move back, so that the insertion tube 44 pulls out the connecting tube 35, and then controls the motor rotating assembly 23 to move, so that the rotating disc 24 moves the next loading tube 31 to the testing position. After the trigger switch 48 at the next position is pressed and pushed by the protrusion 49, it means that the loading tube 31 has moved into place, and the PLC controller controls the motor rotating assembly 23 to stop the action, and at this time the PLC controller will control the adjusting motor 53 to drive the adjusting screw 52 to rotate for 5s. By adjusting the threaded sleeve effect of the screw rod 52 and the adjusting block 54, the adjusting block 54 is moved a certain distance in the adjusting shell 51, so that the round head end of the adjusting block 54 presses on the next pressure regulating switch 55. At this time, in the subsequent detection work, the PLC controller will control the circulation pump 47 to work at a higher power, and supply a higher drilling fluid pressure into the core. Based on different test pressures, the staff can observe the change law of the permeability of the core sample under different pressure conditions, which is helpful to more comprehensively evaluate the permeability performance of the core and provide more comprehensive detection performance.

[0046] During the detection process, when drilling fluid is supplied to the core, the PLC controller controls the action of the dual-axis motor 67, and controls the power supply equipment to supply power to the transmission electromagnetic plate 612 connected to one end of the dual-axis motor 67. The transmission electromagnetic plate 612 is energized to generate magnetism opposite to the transmission permanent magnet plate 611, so that the transmission electromagnetic plate 612 and the transmission permanent magnet plate 611 are firmly connected together, so that the dual-axis motor 67 can drive the linkage shaft 69 to rotate synchronously, and then drive the transmission screw 82 on one side to rotate through the bevel gear assembly 610. Through the threaded connection between the transmission screw 82 and the push plate 83, the push plate 83 cooperates with the push rod 84 to push the mounting plate 65 and the marking pen 66 upward, so that the marking pen 66 draws a vertical line segment on the canvas 62 until the pressure sensor 36 senses it. To the fluid pressure of the drilling fluid, at this time, the PLC controller controls the power supply device to cut off the power supply to the current transmission electromagnetic plate 612, so that the permeability of the shale core can be displayed with an intuitive line segment, and at this time, the PLC controller supplies power to the transmission electromagnetic plate 612 on the other side through the power supply device, so that the transmission screw 82 on the other side is put into operation, so that the marking pen 66 on the other side draws a vertical line segment on the canvas 62, until the drilling fluid pressure value detected by the pressure sensor 36 reaches the threshold value, at this time, the PLC controller controls the dual-axis motor 67 to stop the action, which can further display the permeability rate of the shale core after the drilling fluid infiltration occurs, so that the staff can quickly obtain key detection information, and can intuitively reflect the change trend of the detection result with the variable;

[0047] After the detection is completed, the PLC controller controls the longitudinal electric slide 63 to drive the moving plate 64 to move backward, so that the marking pen 66 is separated from the canvas 62, and the PLC controller controls the power supply equipment to supply power to the transmission electromagnetic plates 612 on both sides, and the PLC controller then starts the double-axis motor 67 to reverse, so that the two mounting plates 65 move downward to the initial position, until the push plate 83 presses on the reset confirmation switch 85, indicating that the reset is in place. At this time, the PLC controller controls the power supply equipment to cut off the power supply to the transmission electromagnetic plate 612 on the corresponding side, until the two reset confirmation switches 85 are pressed and triggered, the PLC controller controls the double-axis motor 67 to stop moving, and the PLC controller controls the electric roller assembly 61 to reel the canvas 62, so that the next clean position of the canvas 62 is aligned with the marking pen 66, preparing for the detection work under the next pressure condition, which is convenient for direct comparison of the detection results of multiple samples, making the detection work more convenient and quick.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A shale oil well wall drilling fluid seepage pressure simulation detection device, comprising a base (1), characterized in that: Also includes: A support transfer mechanism (2) is fixedly mounted on the base (1) and is used to continuously transfer a plurality of samples to be tested; A plurality of loading and fixing mechanisms (3) are equidistantly fixedly mounted on the supporting and transferring mechanism (2), and the plurality of loading and fixing mechanisms (3) are arranged in a ring-shaped distribution; A pressure supply detection mechanism (4), arranged on one side of the supporting and transferring mechanism (2), and used for providing a fluid detection pressure for a sample to be detected; A detection force adjustment mechanism (5) is fixedly mounted on the supply pressure detection mechanism (4) and is used to adjust the detection pressure of the supply pressure detection mechanism (4); A test result recording mechanism (6) is fixedly mounted on the base (1) and is used to receive the test result information obtained by the loading fixing mechanism (3) and the pressure supply detection mechanism (4) and to display it intuitively; The support transfer mechanism (2) comprises a U-shaped support plate (21) fixedly mounted on the upper end of the base (1); a horizontal portion of the U-shaped support plate (21) and the upper end of the base (1) are rotatably connected to a support column (22) via a bearing; a motor rotating assembly (23) for driving the support column (22) to rotate is fixedly mounted on the upper end of the base (1); a rotating disc (24) is fixedly connected to the upper end of the support column (22); a plurality of insertion barrels (25) are evenly fixedly sleeved and arranged in an annular manner on the surface of the rotating disc (24); The loading fixing mechanism (3) comprises a loading cylinder (31) fixedly inserted in the insertion cylinder (25), a loading cover (32) being installed at the upper end of the loading cylinder (31), a positioning cylinder (33) being fixedly installed on opposite sides of the loading cylinder (31) and the loading cover (32), a sealing rubber ring (34) arranged in the positioning cylinder (33) being fixedly installed on the inner sides of the loading cylinder (31) and the loading cover (32), a connecting cylinder (35) being fixedly inserted on opposite sides of the loading cylinder (31) and the loading cover (32), a plurality of pressure sensors (36) being symmetrically installed on the side wall of the loading cylinder (31), and the loading cylinder (31) and the loading cover (32) being fixedly connected via a plurality of sets of symmetrically arranged locking mechanisms (7); The pressure supply detection mechanism (4) comprises a U-shaped bracket (41) fixedly mounted on the upper end of the base (1), two electric push rods (42) are symmetrically fixedly sleeved at both ends of the U-shaped bracket (41), the output ends of the two electric push rods (42) are fixedly connected to the same pressure plate (43), an insertion tube (44) is fixedly sleeved on the pressure plate (43), the insertion tube (44) and the connecting tube (35) are sealedly sleeved, and a circulation pipe (44) is installed between the two insertion tubes (44). 5), a liquid storage tank (46) and a circulation pump (47) are mounted on the circulation pipe (45); the liquid storage tank (46) is fixedly mounted on the upper end of the base (1); the circulation pump (47) is fixedly mounted outside the U-shaped bracket (41); a plurality of trigger switches (48) corresponding to the loading and fixing mechanism (3) are fixedly mounted on the outer side of the rotating disc (24); and a pressing protrusion (49) opposite to the trigger switch (48) is fixedly mounted on the inner side of the vertical portion of the U-shaped bracket (41); The detection force adjustment mechanism (5) comprises an adjustment shell (51) fixedly mounted on the outer wall of the U-shaped bracket (41), an adjustment screw (52) being rotatably connected inside the adjustment shell (51), an adjustment motor (53) for driving the adjustment screw (52) to rotate is fixedly mounted on the outer wall of the adjustment shell (51), an adjustment block (54) is threadedly sleeved on the rod wall of the adjustment screw (52), one end of the adjustment block (54) is configured as an arc head structure, and a plurality of pressure adjustment switches (55) arranged side by side are fixedly mounted on the inner wall of the adjustment shell (51) at equal intervals; The detection result recording mechanism (6) comprises an electric roller assembly (61) fixedly mounted on the upper end of the base (1), a canvas (62) being wound around the electric roller assembly (61), a longitudinal electric slide rail (63) being fixedly mounted on the upper end of the base (1), a movable plate (64) being fixedly mounted on the upper end of a slider inside the longitudinal electric slide rail (63), two self-sensing push mechanisms (8) being symmetrically fixedly mounted on the upper end of the movable plate (64), a mounting plate (65) being fixedly mounted on the upper output end of the self-sensing push mechanism (8), a marking pen (66) being fixedly inserted on the surface of the mounting plate (65), the tip of the marking pen (66) being in contact with the On the canvas (62), a dual-axis motor (67) is fixedly installed at the middle position of the upper end of the movable plate (64), and an L-shaped extension plate (68) is fixedly installed on the outer wall of the lower end of the self-sensing push mechanism (8). A through hole is opened on the side wall of the lower end of the L-shaped extension plate (68), and a linkage shaft (69) is rotatably sleeved in the corresponding through hole through a bearing. One end of the linkage shaft (69) is transmission-connected to the lower input end of the self-sensing push mechanism (8) through a bevel gear assembly (610), and the other end of the linkage shaft (69) is fixedly connected to a transmission permanent magnet plate (611), and both end output ends of the dual-axis motor (67) are fixedly connected to a transmission electromagnetic plate (612).

2. A shale oil well wall drilling fluid seepage pressure simulation detection device according to claim 1, characterized in that: The locking mechanism (7) comprises a locking block (71) mounted at the connection between the loading cylinder (31) and the loading cover (32); the outer walls of the loading cylinder (31) and the loading cover (32) are both fixedly mounted with a T-shaped clamping block (72) corresponding to the locking block (71); the side wall of the locking block (71) is symmetrically provided with two T-shaped clamping grooves (73) matched with the T-shaped clamping block (72); the locking block (71) and the T-shaped clamping block (72) are fixedly connected by fixing bolts; the upper end of the loading cylinder (31) is also fixedly mounted with a sealing connection plate (74); the lower end of the loading cover (32) is provided with a sealing connection groove (75) matched with the sealing connection plate (74); the sealing connection plate (74) and the sealing connection groove (75) are both annular structures.

3. A shale oil well wall drilling fluid seepage pressure simulation detection device according to claim 2, characterized in that: The self-sensing push mechanism (8) comprises a push shell (81), one side of the inner wall of the push shell (81) is rotatably connected to a vertically arranged transmission screw (82), the rod wall of the transmission screw (82) is threadedly sleeved with a push plate (83), the upper end of the push plate (83) is fixedly connected to a push rod (84), the upper end of the push rod (84) passes through the upper end of the push shell (81) and is fixedly connected to the lower end of the mounting plate (65), and a reset confirmation switch (85) is fixedly installed at the bottom of the inner wall of the push shell (81) and is arranged opposite to the push plate (83).

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