Linear slip ring type bit pressure adjusting mechanism for bionic self-balancing drilling tool

Abstract

The invention discloses a linear slip ring type bit pressure adjusting mechanism for a bionic self-balancing drilling tool, and relates to the technical field of drilling tests, the linear slip ring type bit pressure adjusting mechanism comprises a transition joint, a connecting joint, a torque motor stator, an upper torque-isolating pressure-transmitting joint and a lower torque-isolating pressure-transmitting joint which are coaxially and fixedly connected, and a displacement monitoring assembly A is arranged in the transition joint; the mud guide pipe, the pressure regulating motor transmission shaft, the pressure regulating and transmitting lead screw and the torque-isolating and pressure-transmitting upper shaft are coaxially and fixedly connected, the pressure regulating motor transmission shaft can rotate along with a torque motor rotor and can axially move along the torque motor rotor, the pressure regulating and transmitting lead screw is in threaded connection with the inner wall of the torque-isolating and pressure-transmitting upper connector, and the torque-isolating and pressure-transmitting assembly D is arranged on the outer side of the torque-isolating and pressure-transmitting lower shaft. The upper end of the torsion-isolating pressure-transmitting lower shaft penetrates through the torsion-isolating pressure-transmitting upper shaft and then extends into the pressure-regulating pressure-transmitting lead screw, and the copper sliding assembly C is arranged between the torsion-isolating pressure-transmitting assembly D and the torsion-isolating pressure-transmitting lower connector and used for transmitting signals of a pressure sensor in the torsion-isolating pressure-transmitting assembly D.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, and in particular to a linear slip ring type drilling pressure adjustment mechanism for a biomimetic self-balancing drilling tool. Background Technology

[0002] During drilling, the drill pipe experiences significant torque due to the interaction between the drill string and the borehole. Excessive torque can lead to drill pipe deformation or even breakage, resulting in a series of serious consequences. To address this issue, the inventors proposed "A Downhole Torque Self-Balancing Cabled Drilling System" (publication number CN106761480B), fundamentally solving this problem. The condition for this drilling system to achieve torque self-balancing downhole lies in the control of drilling pressure on both the inner and outer drill bits. Regarding the issue of drilling pressure control for both internal and external drill bits, the inventor proposed "A Dual-Bit Torque Self-Balancing Pressure Regulating Device" (publication number: CN107795273B) to achieve dynamic distribution of drilling pressure applied to the internal and external drill bits. However, the cable structure used for transmitting signals poses a risk due to cable entanglement when the drill bit rotates at high speed. The inventor also proposed "A Dual-Bit Hollow Push-Pull System for a Torque Self-Balancing Drilling Tool System" (publication number: CN110185385B) to solve the problem of large pushing force and small pulling force of solid electric push-pull rods. This invention provides a hollow electric push-pull system that can be used to store cables or circulate drilling fluid. However, this system cannot achieve timely feedback and monitoring of drilling pressure.

[0003] In order to achieve stable signal transmission and real-time feedback and monitoring of drilling pressure during drilling, it is of great significance to invent a linear slip ring type drilling pressure adjustment mechanism for biomimetic self-balancing drilling tools. Summary of the Invention

[0004] In view of the problems and shortcomings of the existing technology, the purpose of this invention is to provide a linear slip ring type drilling pressure adjustment mechanism for biomimetic self-balancing drilling tools, so that drilling pressure can be fed back and monitored in a timely manner while the signal is transmitted stably.

[0005] A biomimetic self-balancing drill bit linear slip ring type drill pressure adjustment mechanism includes a displacement monitoring component A, a mud guide pipe, a transition joint, a pressure regulating motor drive shaft, a torque motor stator, a torque motor rotor, a pressure regulating and transmission screw, an upper torque transmission joint, an upper torque transmission shaft, a lower torque transmission joint, a lower torque transmission shaft, a connecting joint, a copper slip ring component C, and a lower torque transmission component D. The transition joint, connecting joint, torque motor stator, upper and lower torque transmission joints are coaxially fixed. The upper end of the mud conduit passes through the transition joint, and the mud conduit is axially slidably connected within the displacement monitoring component A. The displacement monitoring component A is located within the transition joint and is used to detect the axial displacement of the mud conduit. The mud conduit, pressure regulating motor drive shaft, pressure regulating screw, and upper torque transmission shaft are coaxially fixed. The pressure regulating motor drive shaft can rotate with the torque motor rotor and can move axially along the torque motor rotor. The pressure regulating screw is threadedly connected to the inner wall of the upper torque transmission joint. The torque transmission component D is located outside the lower torque transmission shaft. The upper end of the lower torque transmission shaft passes through the upper torque transmission shaft and extends into the pressure regulating screw. The copper sliding component C is located between the torque transmission component D and the lower torque transmission joint and is used to transmit pressure sensor signals inside the torque transmission component D.

[0006] Preferably, a cooling oil transmission pipe is axially inserted inside the torque-isolation pressure-transmitting joint.

[0007] Preferably, displacement monitoring component A includes a pressure regulating displacement limiting joint, a pressure regulating displacement rotating sleeve, a retaining ring, and a pressure regulating displacement sensor; The pressure regulating displacement limiting joint is coaxially sleeved on the outside of the mud conduit. The upper end of the pressure regulating displacement limiting joint is connected to the transition joint. The lower end of the inner wall of the pressure regulating displacement limiting joint is provided with a sliding groove extending along its axis. The pressure regulating displacement sensor is connected to the inner wall of the transition joint through the pressure regulating displacement sensor fixing block. The inner ends of the two retaining rings are respectively embedded in the outer wall of the mud conduit, and the pressure regulating displacement rotating sleeve is snapped between the two retaining rings. The pressure regulating displacement rotating sleeve is coaxially sleeved on the mud conduit. The pressure regulating displacement rotating sleeve is slidably connected to the sliding groove at the lower part of the pressure regulating displacement limiting joint through the sliding key on the outer wall, so that the pressure regulating displacement rotating sleeve can move axially with the mud conduit. The pressure regulating displacement sensor converts the detected axial displacement signal into an electrical signal and transmits it to the upper control console.

[0008] Preferably, the torque motor B includes a torque motor rotor and a torque motor stator. The torque motor rotor has two sliding grooves extending axially inside. The variable voltage motor drive shaft has two sliding keys on its outside. The variable voltage motor drive shaft is located in the middle of the torque motor rotor. The sliding keys on the variable voltage motor drive shaft are connected to the sliding grooves on the torque motor rotor, so that the variable voltage motor drive shaft can rotate with the torque motor rotor and move axially.

[0009] Preferably, the torsion-isolation pressure transmission assembly D includes two sets of torsion-isolation pressure transmission bearing assemblies, an upper torsion-isolation pressure transmission bearing seat, an upper connector for a pressure sensor, a pressure sensor, a lower connector for a pressure sensor, and a lower torsion-isolation pressure transmission bearing seat. The upper bearing housing for torque transmission, the upper connector of the pressure sensor, the pressure sensor, the lower connector of the pressure sensor, and the lower bearing housing for torque transmission are coaxially fixed together. The inner ring of the upper-end torsion-isolation and pressure-transmitting bearing assembly is interference-fitted with the upper torsion-isolation and pressure-transmitting shaft, and the outer ring of the upper-end torsion-isolation and pressure-transmitting bearing assembly is interference-fitted with the upper torsion-isolation and pressure-transmitting bearing housing; the inner ring of the lower-end torsion-isolation and pressure-transmitting bearing assembly is interference-fitted with the lower torsion-isolation and pressure-transmitting shaft, and the outer ring of the lower-end torsion-isolation and pressure-transmitting bearing assembly is interference-fitted with the lower torsion-isolation and pressure-transmitting bearing housing. One end of each of the two retaining rings is embedded in the upper and lower shafts of the torque-isolation and pressure-transmitting system, respectively, and is secured to the lower part of the upper torque-isolation and pressure-transmitting bearing assembly and the upper part of the lower torque-isolation and pressure-transmitting bearing assembly, respectively, to fix the two in place.

[0010] Preferably, it also includes an inner tube straightening ring, and the inner tube straightening ring is rotatably connected at the gap between the torque-isolating and pressure-transmitting lower shaft and the pressure-regulating and pressure-transmitting screw.

[0011] Preferably, a skeleton oil seal and a sealing ring gasket are placed between the upper gap of the lower shaft for torque transmission and the upper shaft for torque transmission.

[0012] Preferably, the copper sliding assembly C includes a drill pressure sensor cable fixing copper sliding block, a drill pressure sensor cable fixing copper sliding support, a drill pressure sensor cable fixing copper sliding component, a drill pressure sensor cable upper sliding block, a drill pressure sensor cable copper sliding support, a drill pressure sensor cable copper sliding component, and a drill pressure sensor cable lower sliding block. The upper end of the copper sliding support for fixing the drill pressure sensor cable is fixed with a copper sliding block for fixing the drill pressure sensor cable. The copper sliding block for fixing the drill pressure sensor cable is connected to the lower connector of the torsion-isolation and pressure transmission by bolts to limit its axial displacement. The copper sliding support for fixing the drill pressure sensor cable has three inner grooves on the side away from the inner wall of the lower connector of the torsion-isolation and pressure transmission. The three copper sliding parts for fixing the drill pressure sensor cable are respectively embedded into the three inner grooves of the copper sliding support for fixing the drill pressure sensor cable. The copper sliding support for the drill pressure sensor cable has an inner groove on the side near the copper sliding support for fixing the drill pressure sensor cable. The copper sliding component of the drill pressure sensor cable is fixed in the inner groove of the copper sliding support for the drill pressure sensor cable. An upper pressure block for the copper sliding support for the drill pressure sensor cable is fixedly connected to the upper end of the copper sliding support for the drill pressure sensor cable, and a lower pressure block for the copper sliding support for the drill pressure sensor cable is fixedly connected to the lower end of the copper sliding support for the drill pressure sensor cable. The upper pressure block and the lower pressure block for the copper sliding support for the drill pressure sensor cable are fixedly connected to the upper bearing seat for the torsion transmission. The copper sliding member for fixing the drill pressure sensor cable makes sliding contact with the copper sliding member for the drill pressure sensor cable.

[0013] The beneficial effects of this invention are: This invention utilizes the characteristics of threaded connections that can transmit both torque and axial force, and the torque-isolation bearing assembly that isolates torque transmission pressure, to accurately and effectively control the drilling pressure of self-balancing dual-bit drill tools. Furthermore, it incorporates a data sensing component to achieve feedback and monitoring of drilling pressure, which is of great significance for solving the torque balance problem in dual-bit drilling systems. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a cross-sectional view of the present invention along the aa direction; Figure 3 This is a partial enlarged view of the copper sliding assembly C and the lower torsion transmission assembly D; Figure 4 yes Figure 1 Schematic diagram of the bb-direction section; Figure 5 This is the main view of the copper sliding component; Figure 6 This is a top view of the copper sliding assembly; Figure 7 This is a magnified view of a portion of torque motor B; Figure 8 This is a diagram showing the connection structure between the copper sliding assembly C and the upper bearing housing for torque transmission and pressure isolation. Figure 9 This is a cross-sectional view of the connection between the copper sliding assembly C and the upper bearing housing for torque transmission and pressure isolation; Figure 10 This is a magnified view of a portion of displacement monitoring component A; Figure 11 This is a 3D structural diagram of the copper sliding component C; Explanation of reference numerals in the attached drawings: 1: Mud guide pipe; 2: Transition joint; 3: Pressure regulating displacement sensor; 4: Pressure regulating displacement limited rotation joint; 5: Snap ring; 6: Pressure regulating displacement rotating sleeve; 7: Pressure regulating motor drive shaft; 8: Torque motor stator; 9: Torque motor rotor; 10: Copper sliding block for fixing drill pressure sensor cable; 11: Copper sliding support for fixing drill pressure sensor cable; 12: Copper sliding component for fixing drill pressure sensor cable; 13: Upper pressure block for copper sliding component of drill pressure sensor cable; 14: Copper sliding support for drill pressure sensor cable; 15: Copper sliding component of drill pressure sensor cable; 16: Copper sliding pressure block for drill pressure sensor cable; 17: Pressure regulating and transmission screw; 18: Inner tube straightening ring; 19: Skeleton oil seal; 20: Sealing ring gasket; 21: Torque-isolated pressure transmission upper connector; 22: Torque-isolated pressure transmission upper shaft; 23: Torque-isolated pressure transmission bearing assembly; 24: Torque-isolated pressure transmission upper bearing seat; 25: Pressure sensor upper connector; 26: Pressure sensor; 27: Pressure sensor lower connector; 28: Torque-isolated pressure transmission lower bearing seat; 29: Torque-isolated pressure transmission lower connector; 30: Torque-isolated pressure transmission lower shaft; 31: Cooling oil transmission pipe; 32: Connecting joint. Detailed Implementation

[0015] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0016] Referring to the attached figures, a linear slip ring type drilling pressure adjustment mechanism for a biomimetic self-balancing drilling tool includes a displacement monitoring component A, a mud guide 1, a transition joint 2, a pressure regulating motor drive shaft 7, a torque motor stator 8, a torque motor rotor 9, a pressure regulating and transmission screw 17, an upper torque transmission joint 21, an upper torque transmission shaft 22, a lower torque transmission joint 29, a lower torque transmission shaft 30, a connecting joint 32, a copper slip ring component C, and a lower torque transmission component D. Transition joint 2, connecting joint 32, torque motor stator 8, torque-isolated pressure transmission upper joint 21, and torque-isolated pressure transmission lower joint 29 are coaxially fixed. The upper end of the mud conduit 1 passes through the transition joint 2, and the mud conduit 1 is axially slidably connected in the displacement monitoring component A. The displacement monitoring component A is set in the transition joint 2 and is used to detect the axial displacement of the mud conduit 1. The mud conduit 1, pressure regulating motor drive shaft 7, pressure regulating screw 17, and torque-isolated pressure transmission upper shaft 22 are coaxially fixed, and are connected to each other by six circumferentially evenly arranged bolts. The pressure regulating motor drive shaft 7 can rotate with the torque motor rotor 9 and can move along the axial direction of the torque motor rotor 9. The pressure regulating lead screw 17 is threaded to the inner wall of the torque-isolated pressure transmission upper connector 21. The torque-isolated pressure transmission assembly D is located outside the torque-isolated pressure transmission lower shaft 30. The upper end of the torque-isolated pressure transmission lower shaft 30 passes through the torque-isolated pressure transmission upper shaft 22 and extends into the pressure regulating lead screw 17. The copper sliding assembly C is located between the torque-isolated pressure transmission assembly D and the torque-isolated pressure transmission lower connector 29 and is used to transmit signals to the pressure sensor 26 inside the torque-isolated pressure transmission assembly D.

[0017] Specifically, a cooling oil transmission pipe 31 is axially inserted inside the torque-isolation and pressure-transmitting connector 29.

[0018] Specifically, displacement monitoring component A includes a pressure regulating displacement limiting joint 4, a pressure regulating displacement rotating sleeve 6, a retaining ring 5, and a pressure regulating displacement sensor 3; The pressure regulating displacement limiting joint 4 is coaxially sleeved on the outside of the mud conduit 1. The upper end of the pressure regulating displacement limiting joint 4 is connected to the transition joint 2 by bolts. The lower end of the inner wall of the pressure regulating displacement limiting joint 4 is provided with a sliding groove extending along its axial direction. The pressure regulating displacement sensor 3 is connected to the inner wall of the transition joint 2 through the pressure regulating displacement sensor fixing block. The inner ends of the two retaining springs 5 ​​are respectively embedded in the outer wall of the mud conduit 1, and the pressure regulating displacement rotating sleeve 6 is snapped between the two retaining springs 5. The pressure regulating displacement rotating sleeve 6 is coaxially sleeved on the mud conduit 1. The pressure regulating displacement rotating sleeve 6 is slidably connected to the sliding groove at the lower part of the pressure regulating displacement limiting joint 4 through the sliding key on the outer wall, so that the pressure regulating displacement rotating sleeve 6 can move axially with the mud conduit 1. The pressure regulating displacement sensor 3 converts the detected axial displacement signal into an electrical signal and transmits it to the upper control console.

[0019] Specifically, the torque motor B includes a torque motor rotor 9 and a torque motor stator 8. The torque motor rotor 9 has two sliding grooves extending along its axial direction inside. The variable voltage motor drive shaft 7 has two sliding keys on its outside. The variable voltage motor drive shaft 7 is located in the middle of the torque motor rotor 9. The sliding keys on the variable voltage motor drive shaft 7 are connected to the sliding grooves on the torque motor rotor 9, so that the variable voltage motor drive shaft 7 can rotate with the torque motor rotor 9 and move axially.

[0020] Specifically, the torsion-isolation pressure transmission assembly D includes two sets of torsion-isolation pressure transmission bearing assemblies 23, an upper torsion-isolation pressure transmission bearing seat 24, an upper pressure sensor connector 25, a pressure sensor 26, a lower pressure sensor connector 27, and a lower torsion-isolation pressure transmission bearing seat 28. The upper bearing housing 24 for torque transmission, the upper connector 25 for pressure sensor, the pressure sensor 26, the lower connector 27 for pressure sensor, and the lower bearing housing 28 for torque transmission are coaxially fixed together and connected to each other by bolts. The inner ring of the upper-end torsion-isolation and pressure-transmitting bearing assembly 23 is interference-fitted with the upper torsion-isolation and pressure-transmitting shaft 22, and the outer ring of the upper-end torsion-isolation and pressure-transmitting bearing assembly 23 is interference-fitted with the upper torsion-isolation and pressure-transmitting bearing seat 24; the inner ring of the lower-end torsion-isolation and pressure-transmitting bearing assembly 23 is interference-fitted with the lower torsion-isolation and pressure-transmitting shaft 30, and the outer ring of the lower-end torsion-isolation and pressure-transmitting bearing assembly 23 is interference-fitted with the lower torsion-isolation and pressure-transmitting bearing seat 28. One end of each of the two retaining rings 5 ​​is embedded in the upper shaft 22 and the lower shaft 30 of the torque-isolation and pressure transmission, respectively, and is respectively locked in the lower part of the upper torque-isolation and pressure transmission bearing assembly 23 and the upper part of the lower torque-isolation and pressure transmission bearing assembly 23 to fix the two together.

[0021] Specifically, it also includes an inner tube straightening ring 18, and the inner tube straightening ring 18 is rotatably connected at the gap between the torque-isolating and pressure-transmitting lower shaft 30 and the pressure-regulating and pressure-transmitting screw 17.

[0022] Specifically, a skeleton oil seal 19 and a sealing ring gasket 20 are placed between the upper gap of the lower shaft 30 and the upper shaft 22.

[0023] Specifically, the copper sliding assembly C includes a drill pressure sensor cable fixing copper sliding block 10, a drill pressure sensor cable fixing copper sliding support 11, a drill pressure sensor cable fixing copper sliding component 12, a drill pressure sensor cable upper copper sliding block 13, a drill pressure sensor cable copper sliding support 14, a drill pressure sensor cable copper sliding component 15, and a drill pressure sensor cable lower copper sliding block 16. The upper end of the drill pressure sensor cable fixing copper sliding support 11 is fixedly connected to the drill pressure sensor cable fixing copper sliding block 10. The drill pressure sensor cable fixing copper sliding block 10 is connected to the torsion-isolated pressure transmission lower connector 29 by bolts to limit its axial displacement. The drill pressure sensor cable fixing copper sliding support 11 has three inner grooves on the side away from the inner wall of the torsion-isolated pressure transmission lower connector 29. The three drill pressure sensor cable fixing copper sliding parts 12 are respectively embedded into the three inner grooves of the drill pressure sensor cable fixing copper sliding support 11 for fixation. The copper sliding support 14 for the drill pressure sensor cable has an inner groove on the side near the copper sliding support 11 for fixing the drill pressure sensor cable. The copper sliding component 15 for the drill pressure sensor cable is fixed in the inner groove of the copper sliding support 14 for the drill pressure sensor cable. The upper end of the copper sliding support 14 for the drill pressure sensor cable is fixedly connected to the upper pressure block 13 for the drill pressure sensor cable, and the lower end of the copper sliding support 14 for the drill pressure sensor cable is fixedly connected to the lower pressure block 16 for the drill pressure sensor cable. The upper pressure block 13 and the lower pressure block 16 for the drill pressure sensor cable are connected and fixedly connected to the upper bearing seat 24 for torque transmission through two sets of screws and nuts. The copper sliding member 12 for fixing the drill pressure sensor cable is in sliding contact with the copper sliding member 15 for the drill pressure sensor cable. During operation, after receiving a signal, the pressure sensor 26 transmits it to the drill pressure sensor cable copper slide 15, which in turn transmits it to the drill pressure sensor cable fixing copper slide 12. The drill pressure sensor cable fixing copper slide 12 then transmits the signal to the upper control console via a cable. This copper slide assembly C ensures stable signal transmission even when the drill bit is drilling at high speed.

[0024] Working principle of the invention: During operation, when the torque motor rotor 9 rotates forward, it transmits the torque it generates to the pressure regulating motor drive shaft 7, the pressure regulating lead screw 17, and the torque-isolated upper shaft 22 via a sliding key, causing them to rotate together. Since the pressure regulating lead screw 17 is threadedly connected to the torque-isolated upper connector 21, and the pressure regulating motor drive shaft 7 can generate relative movement with the axially constrained torque motor rotor 9 via a sliding groove, the pressure regulating lead screw 17 drives the mud guide pipe 1, the pressure regulating motor drive shaft 7, and the torque-isolated upper shaft 22 to spirally descend along the internal thread of the torque-isolated upper connector 21, generating axial displacement and pressure. Due to the action of the torsion-isolation bearing assembly 23, the upper torsion-isolation bearing seat 24 can bear only pressure without torque and transmit the pressure to other parts in the lower torsion-isolation assembly D. The lower torsion-isolation assembly D transmits the pressure to the lower torsion-isolation shaft 30 through the torsion-isolation bearing assembly 23, thereby applying drilling pressure to the inner tube. At the same time, the drilling pressure regulating pressure sensor 26 in the lower torsion-isolation assembly D transmits the pressure data to the upper control console through the copper sliding assembly C. The pressure regulating displacement sensor 3 in the displacement monitoring assembly A transmits the displacement data to the upper control console through the copper sliding assembly C, thereby realizing the monitoring and control of drilling pressure.

[0025] Similarly, to lift the mud guide pipe 1, the pressure regulating motor drive shaft 7, the pressure regulating and transmission screw 17, and the torque-isolating and transmission upper shaft 22 upward, simply reverse the torque motor rotor 9.

Claims

1. A linear slip ring type drill pressure adjustment mechanism for a biomimetic self-balancing drill bit, characterized in that: The transition joint (2), the connecting joint (32), the torque motor stator (8), the upper torque-transmitting pressure-transmitting joint (21), and the lower torque-transmitting pressure-transmitting joint (29) are coaxially fixed together. The upper end of the mud conduit (1) passes through the transition joint (2), and the mud conduit (1) is axially slidably connected in the displacement monitoring component A. The displacement monitoring component A is set in the transition joint (2) and is used to detect the axial displacement of the mud conduit (1). The mud conduit (1), the pressure regulating motor drive shaft (7), the pressure regulating screw (17), and the upper torque-transmitting pressure-transmitting shaft (22) are coaxially fixed together. The pressure regulating motor drive shaft (7) can rotate with the torque motor rotor (9) and move along the axial direction of the torque motor rotor (9). The pressure regulating screw (17) is threadedly connected to the inner wall of the torque-isolated pressure upper connector (21). The torque-isolated pressure assembly D is located outside the torque-isolated pressure lower shaft (30). The upper end of the torque-isolated pressure lower shaft (30) passes through the torque-isolated pressure upper shaft (22) and extends into the pressure regulating screw (17). The copper sliding assembly C is located between the torque-isolated pressure assembly D and the torque-isolated pressure lower connector (29) and is used to transmit signals to the pressure sensor (26) inside the torque-isolated pressure assembly D.

2. The linear slip ring type drill pressure adjustment mechanism for a biomimetic self-balancing drill bit according to claim 1, characterized in that: A cooling oil transmission pipe (31) is axially inserted inside the torque-isolation pressure transmission connector (29).

3. The linear slip ring type drill pressure adjustment mechanism for a biomimetic self-balancing drill bit according to claim 1, characterized in that: The displacement monitoring component A includes a pressure regulating displacement limiting joint (4), a pressure regulating displacement rotating sleeve (6), a snap ring (5), and a pressure regulating displacement sensor (3). The pressure-regulating displacement limiting joint (4) is coaxially sleeved on the outside of the mud conduit (1). The upper end of the pressure-regulating displacement limiting joint (4) is connected to the transition joint (2). The lower end of the inner wall of the pressure-regulating displacement limiting joint (4) is provided with a sliding groove that extends axially. The pressure-regulating displacement sensor (3) is connected to the inner wall of the transition joint (2) through the pressure-regulating displacement sensor fixing block. The inner ends of the two snap rings (5) are respectively embedded in the outer wall of the mud conduit (1). The pressure-regulating displacement rotating sleeve (6) is snapped between the two snap rings (5). The pressure-regulating displacement rotating sleeve (6) is coaxially sleeved on the mud conduit (1). The pressure-regulating displacement rotating sleeve (6) is slidably connected to the sliding groove at the lower part of the pressure-regulating displacement limiting joint (4) through the sliding key on the outer wall, so that the pressure-regulating displacement rotating sleeve (6) can move axially with the mud conduit (1). The pressure-regulating displacement sensor (3) converts the detected axial displacement signal into an electrical signal and transmits it to the upper control console.

4. The linear slip ring type drill pressure adjustment mechanism for a biomimetic self-balancing drill bit according to claim 1, characterized in that: The torque motor B includes a torque motor rotor (9) and a torque motor stator (8). The torque motor rotor (9) has two sliding grooves extending along its axial direction inside. The variable voltage motor drive shaft (7) has two sliding keys on its outside. The variable voltage motor drive shaft (7) is located in the middle of the torque motor rotor (9). The sliding keys on the variable voltage motor drive shaft (7) are connected to the sliding grooves on the torque motor rotor (9) so that the variable voltage motor drive shaft (7) can rotate with the torque motor rotor (9) and move axially.

5. The linear slip ring type drill pressure adjustment mechanism for a biomimetic self-balancing drill bit according to claim 1, characterized in that: The torque-isolation pressure transmission assembly D includes two sets of torque-isolation pressure transmission bearing assemblies (23), an upper torque-isolation pressure transmission bearing seat (24), an upper pressure sensor connector (25), a pressure sensor (26), a lower pressure sensor connector (27), and a lower torque-isolation pressure transmission bearing seat (28). The upper bearing housing (24), the upper connector (25), the pressure sensor (26), the lower connector (27), and the lower bearing housing (28) of the torsion-isolation pressure transmission are coaxially fixed together; The inner ring of the upper-end torsion-isolation bearing assembly (23) is interference-fitted with the upper torsion-isolation bearing shaft (22), and the outer ring of the upper-end torsion-isolation bearing assembly (23) is interference-fitted with the upper torsion-isolation bearing housing (24); the inner ring of the lower-end torsion-isolation bearing assembly (23) is interference-fitted with the lower torsion-isolation bearing shaft (30), and the outer ring of the lower-end torsion-isolation bearing assembly (23) is interference-fitted with the lower torsion-isolation bearing housing (28); One end of each of the two snap rings (5) is inserted into the upper shaft (22) and the lower shaft (30) of the torque transmission and pressure isolation respectively, and is respectively locked in the lower part of the upper torque transmission and pressure isolation bearing assembly (23) and the upper part of the lower torque transmission and pressure isolation bearing assembly (23) to fix the two together.

6. The linear slip ring type drill pressure adjustment mechanism for a biomimetic self-balancing drill bit according to claim 1, characterized in that: It also includes an inner tube straightening ring (18), and the inner tube straightening ring (18) is rotatably connected at the gap between the torque-isolating pressure transmission lower shaft (30) and the pressure-regulating screw (17).

7. The linear slip ring type drill pressure adjustment mechanism for a biomimetic self-balancing drill bit according to claim 1, characterized in that: A skeleton oil seal (19) and a sealing ring gasket (20) are placed between the upper gap of the lower shaft (30) and the upper shaft (22).

8. The linear slip ring type drill pressure adjustment mechanism for a biomimetic self-balancing drill bit according to claim 1, characterized in that: The copper sliding assembly C includes a drill pressure sensor cable fixing copper sliding block (10), a drill pressure sensor cable fixing copper sliding support (11), a drill pressure sensor cable fixing copper sliding component (12), a drill pressure sensor cable copper sliding upper pressure block (13), a drill pressure sensor cable copper sliding support (14), a drill pressure sensor cable copper sliding component (15), and a drill pressure sensor cable copper sliding lower pressure block (16). The upper end of the drill pressure sensor cable fixing copper sliding support (11) is fixed with a drill pressure sensor cable fixing copper sliding block (10). The drill pressure sensor cable fixing copper sliding block (10) is connected to the torque-isolating pressure transmission lower connector (29) by bolts to limit its axial displacement. The drill pressure sensor cable fixing copper sliding support (11) is provided with three inner grooves on the side away from the inner wall of the torque-isolating pressure transmission lower connector (29). Three drill pressure sensor cable fixing copper sliding parts (12) are respectively embedded into the three inner grooves of the drill pressure sensor cable fixing copper sliding support (11) for fixing. The copper sliding support (14) for the drill pressure sensor cable has an inner groove on the side near the copper sliding support (11) for fixing the drill pressure sensor cable. The copper sliding component (15) for the drill pressure sensor cable is fixed in the inner groove of the copper sliding support (14). The upper end of the copper sliding support (14) is fixedly connected to the upper pressure block (13) for the drill pressure sensor cable, and the lower end of the copper sliding support (14) is fixedly connected to the lower pressure block (16) for the drill pressure sensor cable. The upper pressure block (13) and the lower pressure block (16) for the drill pressure sensor cable are fixedly connected to the upper bearing seat (24) for torque transmission. The copper sliding member (12) for fixing the drill pressure sensor cable slides in contact with the copper sliding member (15) for the drill pressure sensor cable.

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