A downhole borehole azimuth control device

Abstract

This invention belongs to the technical field of oil and gas extraction equipment, and discloses a downhole drilling azimuth control device, including a first connecting member, a rotating assembly, a driving assembly, and a second connecting member. The first connecting member is used to connect an anchoring device. The rotating assembly includes an outer ring and an inner ring, with the outer ring fixed to the top of the first connecting member and the inner ring rotatably disposed within the outer ring. The driving assembly is disposed on the first connecting member and can drive the inner ring to rotate relative to the outer ring around a first rotation axis. The second connecting member is disposed at the top of the inner ring and can rotate with the inner ring relative to the outer ring; the second connecting member is used to connect a drilling device. During downhole drilling operations, after drilling a hole, the driving assembly drives the inner ring to rotate, thereby driving the drilling device to rotate, thus achieving adjustment of the hole position and ensuring that the boreholes are distributed circumferentially along the well.

Description

Technical Field

[0001] This invention relates to the field of oil and gas extraction equipment technology, and in particular to a downhole borehole orientation control device. Background Technology

[0002] In the process of oil and gas exploration and development, drilling tools need to be lowered into wells to carry out drilling, sampling, and other operations in the producing formation. However, the drilling orientation of the drilling tools in the wellbore is random, making directional drilling impossible. During construction, the holes drilled in a certain section may all be in the same orientation, affecting the construction results.

[0003] Therefore, there is an urgent need for a downhole borehole azimuth control device to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a downhole borehole orientation control device that can adjust the borehole position to ensure that the boreholes are distributed circumferentially along the well.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A downhole borehole azimuth control device includes:

[0007] The first connector is used to connect the anchoring device;

[0008] A rotating assembly includes an outer ring and an inner ring, the outer ring being fixed to the top of the first connector, and the inner ring being rotatably disposed within the outer ring;

[0009] A drive assembly is disposed on the first connector, the drive assembly being capable of driving the inner ring to rotate relative to the outer ring about a first rotation axis;

[0010] The second connector is disposed at the top of the inner ring and is rotatable relative to the outer ring with the inner ring. The second connector is used to connect the drilling device.

[0011] Preferably, the inner sidewall of the inner ring is provided with gear teeth arranged sequentially along the circumference of the inner ring, and the drive assembly includes:

[0012] A rocker arm is disposed at the top of the first connecting member, and the rocker arm is capable of rotating relative to the first connecting member about a second rotation axis parallel to the first rotation axis;

[0013] A pawl is located at one end of the rocker arm near the inner ring;

[0014] A first hydraulic cylinder is disposed on the first connecting member. The first hydraulic cylinder can drive the rocker arm to rotate relative to the first connecting member in a first direction about the second rotation axis, so that the pawl can drive the inner ring to rotate relative to the outer ring in the first direction through the gear teeth.

[0015] Preferably, the drive assembly further includes an elastic element, the pawl is rotatable relative to the rocker arm about a third rotation axis parallel to the first rotation axis, one end of the elastic element is connected to the pawl and the other end is connected to the rocker arm, the rocker arm is provided with a first limiting part and the pawl is provided with a second limiting part, the elastic element is able to drive the pawl to rotate relative to the rocker arm about the third rotation axis in a second direction opposite to the first direction, so that the first limiting part abuts against the second limiting part.

[0016] Preferably, the first hydraulic cylinder includes:

[0017] The first cylinder block is capable of rotating relative to the first connecting member about a fourth rotation axis parallel to the first rotation axis;

[0018] The first piston rod has one end slidably disposed in the first cylinder body and the other end rotatably connected to the rocker arm. The first piston rod is capable of rotating relative to the rocker arm about a fifth rotation axis parallel to the first rotation axis.

[0019] Preferably, the device further includes a locking component disposed on the first connector, the locking component being capable of locking the inner ring onto the first connector.

[0020] Preferably, the locking component includes:

[0021] The second hydraulic cylinder includes a second cylinder body fixedly disposed at the top end of the first connector and a second piston rod with one end slidably disposed in the second cylinder body;

[0022] A limiting member is fixed to the other end of the second piston rod. The second piston rod has a first working position and a second working position. When the second piston rod is in the first working position, the limiting member abuts against the gear teeth to prevent the inner ring from rotating relative to the outer ring. When the second piston rod is in the second working position, the limiting member disengages from the gear teeth, and the inner ring can rotate relative to the outer ring.

[0023] Preferably, the second hydraulic cylinder is a single-acting hydraulic cylinder, and the second hydraulic cylinder further includes a second return spring. When the hydraulic chamber of the second hydraulic cylinder is filled with fluid, the second piston rod can move from the first working position to the second working position. When the hydraulic chamber of the second hydraulic cylinder is discharged, the second return spring can drive the second piston rod from the second working position to the first working position.

[0024] Preferably, the first connector is provided with a first oil inlet and a second oil inlet, the hydraulic chamber of the first hydraulic cylinder is connected to the first oil inlet, and the hydraulic chamber of the second hydraulic cylinder is connected to the second oil inlet.

[0025] Preferably, the downhole borehole azimuth adjustment device further includes a hydraulic system, the hydraulic system comprising:

[0026] tank;

[0027] A hydraulic pump, the oil inlet of which is connected to the oil tank;

[0028] The first solenoid valve has an oil outlet port connected to the oil inlet port of the hydraulic pump, and both the first and second oil inlets are connected to the working oil inlet port of the first solenoid valve. The return oil inlet port of the first solenoid valve is connected to the oil tank.

[0029] The second solenoid valve is installed on the connecting pipeline between the first oil inlet and the working oil port of the first solenoid valve.

[0030] Preferably, when the first solenoid valve is energized, its oil inlet is connected to its working oil port, and when the first solenoid valve is de-energized, its oil return port is connected to its working oil port.

[0031] The beneficial effects of this invention are:

[0032] The downhole drilling azimuth adjustment device provided by this invention is connected to an anchoring device via a first connector, which anchors the first connector within the wellbore. A rotating assembly is provided, with its outer ring fixed to the first connector and its inner ring rotatably positioned within the outer ring. A second connector is located at the top of the inner ring and can rotate with the inner ring relative to the outer ring. A drilling device is mounted on the second connector, allowing the drilling device to rotate relative to the wellbore. A driving assembly drives the inner ring to rotate relative to the outer ring around a first rotation axis, thereby driving the drilling device. During downhole drilling operations, after drilling a hole, the driving assembly drives the inner ring to rotate, which in turn drives the second connector to rotate, thus rotating the drilling device and adjusting the hole position to ensure that the boreholes are distributed circumferentially along the wellbore. Attached Figure Description

[0033] Figure 1This is a schematic diagram of the downhole borehole azimuth control device provided in this embodiment of the invention installed downhole;

[0034] Figure 2 This is a schematic diagram of the downhole borehole azimuth control device provided in an embodiment of the present invention;

[0035] Figure 3 This is a partial structural diagram of the downhole borehole azimuth control device provided in an embodiment of the present invention. Figure 1 ;

[0036] Figure 4 This is a schematic diagram of the second connecting member of the downhole borehole azimuth control device provided in this embodiment of the invention rotating along the first direction;

[0037] Figure 5 This is a schematic diagram of the second connecting member of the downhole borehole azimuth control device provided in this embodiment of the invention rotating in the second direction;

[0038] Figure 6 This is a cross-sectional view of the downhole borehole azimuth control device provided in an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the rotating component of the downhole borehole azimuth control device provided in an embodiment of the present invention;

[0040] Figure 8 This is a cross-sectional view of the rotating component of the downhole borehole azimuth control device provided in an embodiment of the present invention;

[0041] Figure 9 This is a schematic diagram of the drive assembly of the downhole borehole azimuth control device provided in an embodiment of the present invention;

[0042] Figure 10 This is a cross-sectional view of the drive assembly of the downhole borehole azimuth control device provided in an embodiment of the present invention;

[0043] Figure 11 This is a partial structural diagram of the downhole borehole azimuth control device provided in an embodiment of the present invention. Figure 2 .

[0044] In the picture:

[0045] 100. Anchoring device; 200. Drilling device; 300. Downhole drilling azimuth control device;

[0046] 10. Oil tank; 20. Hydraulic pump; 30. First solenoid valve; 40. Second solenoid valve; 50. Relief valve; 60. Filter;

[0047] 1. First connecting component; 11. First oil inlet; 12. Second oil inlet;

[0048] 2. Rotating assembly; 21. Outer ring; 211. First raceway; 22. Inner ring; 221. Gear tooth; 222. Second raceway; 23. Rolling element;

[0049] 3. Drive assembly; 31. Rocker arm; 311. First limiting part; 32. Claw; 321. Second limiting part; 33. First hydraulic cylinder; 331. First cylinder body; 332. First piston rod; 333. First return spring; 34. Elastic element;

[0050] 4. Second connector;

[0051] 5. Locking assembly; 51. Second hydraulic cylinder; 511. Second cylinder body; 5111. Mounting groove; 5112. First rotating shaft; 5113. Second rotating shaft; 512. Second piston rod; 513. Second return spring; 514. Limiting ring; 52. Limiting component;

[0052] 6. First oil passage; 7. Second oil passage. Detailed Implementation

[0053] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0054] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0057] like Figure 1-6 As shown, this embodiment provides a downhole drilling azimuth control device 300, including a first connecting member 1, a rotating assembly 2, a driving assembly 3, and a second connecting member 4. The first connecting member 1 is used to connect an anchoring device 100, which is anchored within the wellbore. Specifically, in this embodiment, the first connecting member 1 is fixedly connected to the anchoring device 100 by a first bolt. The rotating assembly 2 includes an outer ring 21 and an inner ring 22. The outer ring 21 is fixed to the top of the first connecting member 1, and the inner ring 22 is rotatably disposed within the outer ring 21. Specifically, in this embodiment, the outer ring 21 is fixedly connected to the first connecting member 1 by a second bolt. The driving assembly 3 is disposed on the first connecting member 1 and can drive the inner ring 22 to rotate relative to the outer ring 21 around a first rotation axis. The second connecting member 4 is disposed at the top of the inner ring 22 and can rotate with the inner ring 22 relative to the outer ring 21. The second connecting member 4 is used to connect to a drilling device 200. Specifically, in this embodiment, the second connecting member 4 is fixedly connected to the drilling device 200 by a third bolt.

[0058] The downhole drilling azimuth adjustment device provided in this embodiment is connected to the anchoring device 100 through the first connector 1, so that the first connector 1 is anchored in the well. By setting the rotating component 2, the outer ring 21 of the rotating component 2 is fixed to the first connector 1, the inner ring 22 is rotatably set in the outer ring 21, the second connector 4 is set at the top of the inner ring 22 and can rotate with the inner ring 22 relative to the outer ring 21, and the drilling device 200 is set on the second connector 4, so that the drilling device 200 can rotate relative to the well. By setting the driving component 3, the inner ring 22 is driven to rotate relative to the outer ring 21 around the first rotation axis, thereby driving the drilling device 200. When performing downhole drilling operations, after drilling a hole, the driving component 3 drives the inner ring 22 to drive the second connector 4 to rotate, thereby driving the drilling device 200 to rotate, thereby realizing the adjustment of the hole position and ensuring that the hole can be distributed along the circumference of the well.

[0059] Optionally, such as Figure 7 and Figure 8As shown, the rotating assembly 2 also includes rolling elements 23. A first raceway 211 is provided on the inner sidewall of the outer ring 21, and a second raceway 222 is provided on the outer sidewall of the inner ring 22. The first raceway 211 and the second raceway 222 are correspondingly arranged and both match the rolling elements 23. Multiple rolling elements 23 are sandwiched between the first raceway 211 and the second raceway 222. By providing rolling elements 23 between the inner ring 22 and the outer ring 21, the resistance of the inner ring 22 when rotating relative to the outer ring 21 is reduced, making it easier to drive the inner ring 22 to rotate by the driving assembly 3.

[0060] Optionally, such as Figure 3-7 As shown, the inner wall of the inner ring 22 is provided with gear teeth 221 arranged sequentially along the circumference of the inner ring 22. The drive assembly 3 includes a rocker arm 31, a pawl 32, and a first hydraulic cylinder 33. The rocker arm 31 is disposed at the top of the first connecting member 1 and can rotate relative to the first connecting member 1 about a second rotation axis parallel to the first rotation axis. The pawl 32 is disposed at the end of the rocker arm 31 near the inner ring 22. The first hydraulic cylinder 33 is disposed on the first connecting member 1 and can drive the rocker arm 31 to rotate relative to the first connecting member 1 about the second rotation axis in a first direction, so that the pawl 32 can drive the inner ring 22 to rotate relative to the outer ring 21 in the first direction through the gear teeth 221.

[0061] Optionally, such as Figure 4 , Figure 5 and Figure 9As shown, the drive assembly 3 also includes an elastic element 34. The pawl 32 can rotate relative to the rocker arm 31 about a third rotation axis parallel to the first rotation axis. One end of the elastic element 34 is connected to the pawl 32, and the other end is connected to the rocker arm 31. The rocker arm 31 is provided with a first limiting part 311, and the pawl 32 is provided with a second limiting part 321. The elastic element 34 can drive the pawl 32 to rotate relative to the rocker arm 31 about the third rotation axis in a second direction opposite to the first direction, so that the first limiting part 311 and the second limiting part 321 abut against each other. The second limiting part 321 on the pawl 32 and the first limiting part 311 on the rocker arm 31 cooperate to limit the pawl 32. During the process of the first hydraulic cylinder 33 driving the rocker arm 31 to rotate in the first direction, thereby causing the pawl 32 to drive the inner ring 22 to rotate, the first limiting part 311 and the second limiting part 321 abut against each other, preventing the pawl 32 from rotating relative to the rocker arm 31 in the second direction. During the process of the first hydraulic cylinder 33 driving the rocker arm 31 to rotate in the second direction, thereby causing the pawl 32 to return to its original position, the first limiting part 311 and the second limiting part 321 disengage from each other. Under the action of the inner ring 22, the pawl 32 rotates in the first direction, and the elastic element 34 stretches, thereby preventing the pawl 32 from driving the inner ring 22 to rotate in the second direction during the return process. After the pawl 32 returns to its original position, the pawl 32 disengages from the gear teeth 221 of the inner ring 22, and the elastic element 34 drives the pawl 32 to rotate in the second direction until the first limiting part 311 and the second limiting part 321 abut.

[0062] Optionally, such as Figure 4 , Figure 5 and Figure 10 As shown, the first hydraulic cylinder 33 includes a first cylinder body 331 and a first piston rod 332. The first cylinder body 331 is rotatable relative to the first connecting member 1 about a fourth rotation axis parallel to the first rotation axis. The first piston rod 332 has one end slidably disposed within the first cylinder body 331, and the other end rotatably connected to the rocker arm 31. The first piston rod 332 is rotatable relative to the rocker arm 31 about a fifth rotation axis parallel to the first rotation axis. Thus, when the first hydraulic cylinder 33 drives the rocker arm 31 to rotate, it can rotate about the fourth rotation axis as the position of the rocker arm 31 changes.

[0063] Optionally, such as Figure 4 , Figure 5 and Figure 10 As shown, the first hydraulic cylinder 33 is a single-acting hydraulic cylinder. The first hydraulic cylinder 33 also includes a first return spring 333. When the hydraulic chamber of the first hydraulic cylinder 33 is filled with fluid, the first piston rod 332 extends, driving the rocker arm 31 to rotate in the first direction. When the hydraulic chamber of the first hydraulic cylinder 33 is discharged, the first return spring 333 drives the first piston rod 332 to retract, driving the rocker arm 31 to rotate in the second direction.

[0064] Optionally, such as Figure 6As shown, the downhole drilling azimuth control device 300 provided in this embodiment also includes a locking component 5 disposed on the first connecting member 1. The locking component 5 can lock the inner ring 22 onto the first connecting member 1. Thus, after the driving component 3 has adjusted the position of the inner ring 22, locking the inner ring 22 onto the first connecting member 1 by the locking component 5 can prevent the inner ring 22 from rotating relative to the first connecting member 1 during drilling, ensuring accurate drilling position.

[0065] Optionally, such as Figure 6 As shown, the locking assembly 5 includes a second hydraulic cylinder 51 and a limiting member 52. The second hydraulic cylinder 51 includes a second cylinder body 511 fixed to the top of the first connecting member 1 and a second piston rod 522 with one end disposed inside the second cylinder body 511. The limiting member 52 is fixed to the second piston rod 512 of the second hydraulic cylinder 51. The second piston rod 512 has a first working position and a second working position. When the second piston rod 512 is in the first working position, the limiting member 52 abuts against the gear teeth 221 of the inner ring 22 to prevent the inner ring 22 from rotating relative to the outer ring 21. When the second piston rod 512 is in the second working position, the limiting member 52 disengages from the gear teeth 221 of the inner ring 22, and the inner ring 22 can rotate relative to the outer ring 21.

[0066] Optionally, such as Figure 6 As shown, the second hydraulic cylinder 51 is a single-acting hydraulic cylinder, and it also includes a second return spring 513. When the hydraulic chamber of the second hydraulic cylinder 51 is filled with fluid, the second piston rod 512 can move from the first working position to the second working position. When the hydraulic chamber of the second hydraulic cylinder 51 is discharged, the second return spring 513 can drive the second piston rod 512 from the second working position to the first working position. That is, the first working position is the normal position of the second hydraulic cylinder 51, so that the inner ring 22 is locked on the first connecting member 1 under normal conditions. Only when the position of the inner ring 22 is adjusted, the hydraulic chamber of the second hydraulic cylinder 51 is filled with fluid, and the locking component 5 is unlocked, can the inner ring 22 rotate relative to the outer ring 21.

[0067] Specifically, such as Figure 6 and Figure 11 As shown, in this embodiment, the second cylinder 511 is cylindrical and integrally formed with the first connecting member 1. Two mounting grooves 5111 are provided on the side wall of the second cylinder 511. The axis of the mounting grooves 5111 is perpendicular to the first rotation axis, and the two mounting grooves 5111 are symmetrically arranged with respect to the center of the first rotation axis. One end of the second piston rod 512 is slidably disposed within the mounting groove 5111. The second piston rod 512 and the limiting member 52 are both correspondingly disposed with respect to the mounting grooves 5111. The second return spring 513 is disposed between the second piston rod 512 and the bottom of the mounting groove 5111. By symmetrically arranging the two second piston rods 512 and the limiting member 52, the inner ring 22 and the first connecting member 1 are subjected to uniform force when the inner ring 22 is locked.

[0068] Optionally, such as Figure 6 As shown, the second hydraulic cylinder 51 also includes a limiting ring 514, which is disposed in the groove of the mounting groove 5111. The limiting ring 514 corresponds one-to-one with the mounting groove 5111. The limiting ring 514 is threadedly connected to the second cylinder body 511 and slidably and sealingly connected to the second piston rod 512. The limiting ring 514 seals the gap between the groove of the mounting groove 5111 and the second piston rod 512. The hydraulic chamber of the second hydraulic cylinder 51 is formed by the limiting ring 514, the groove wall of the mounting groove 5111, and the piston of the second piston rod 512. The limiting ring 514 also serves to guide and limit the movement of the second piston rod 512.

[0069] Optionally, such as Figure 11 As shown, the first connecting member 1 is provided with a first oil inlet 11 and a second oil inlet 12. The hydraulic chamber of the first hydraulic cylinder 33 is connected to the first oil inlet 11, and the hydraulic chamber of the second hydraulic cylinder 51 is connected to the second oil inlet 12. The first hydraulic cylinder 33 is filled and drained through the first oil inlet 11, and the second hydraulic cylinder 51 is filled and drained through the second oil inlet 12.

[0070] Optionally, such as Figure 11 As shown, the top of the second cylinder 511 is provided with a first rotating shaft 5112 and a second rotating shaft 5113. The axis of the first rotating shaft 5112 is collinear with the fourth rotation axis, and the axis of the second rotating shaft 5113 is collinear with the second rotation axis. The rocker arm 31 is rotatably connected to the second cylinder 511 through the second rotating shaft 5113, thereby enabling the rocker arm 31 to rotate relative to the first connecting member 1 around the second rotation axis. The first cylinder 331 is rotatably connected to the second cylinder 511 through the first rotating shaft 5112, thereby enabling the first cylinder 331 to rotate relative to the first connecting member 1 around the fourth rotation axis.

[0071] Optionally, such as Figure 11 As shown, a first oil passage 6 is provided on the first connecting member 1 and the second cylinder body 511, and a second oil inlet 12 is connected to two mounting slots 5111 via the first oil passage 6. A second oil passage 7 is provided on the first connecting member 1 and the second cylinder body 511, and the first oil inlet 11 is connected to the first rotating shaft 5112 via the second oil passage 7, and passes through the first rotating shaft 5112 to communicate with the hydraulic chamber of the first hydraulic cylinder 33.

[0072] Optionally, such as Figure 2As shown, the downhole borehole azimuth control device 300 provided in this embodiment also includes a hydraulic system, which includes an oil tank 10, a hydraulic pump 20, a first solenoid valve 30, and a second solenoid valve 40. The oil inlet of the hydraulic pump 20 is connected to the oil tank 10, and the oil outlet of the hydraulic pump 20 is connected to the oil inlet of the first solenoid valve 30. The first oil inlet 11 and the second oil inlet 12 are both connected to the working oil port of the first solenoid valve 30, and the oil return port of the first solenoid valve 30 is connected to the oil tank. The second solenoid valve 40 is disposed on the connecting pipeline between the first oil inlet 11 and the working oil port of the first solenoid valve 30.

[0073] Optionally, when the first solenoid valve 30 is de-energized, its return port is connected to its working port. At this time, the hydraulic chamber of the second hydraulic cylinder 51 is connected to the oil tank 10, and the return spring of the second hydraulic cylinder 51 drives the second hydraulic rod from the second working position to the first working position. The limiting member 52 locks the inner ring 22 onto the first connecting member 1. Thus, in the event of a power outage or downhole instrument malfunction, the locking assembly 5 remains in the first working position under the action of the return spring. At this time, the inner ring 22 is locked onto the first connecting member 1, and the position of the inner ring 22 cannot be adjusted, but drilling operations can continue in this position. When the first solenoid valve 30 is energized, its inlet is connected to the working port. If the second solenoid valve 40 is energized at this time, the first piston rod 332 of the first hydraulic cylinder 33 extends, causing the rocker arm 31 to rotate relative to the first connecting member 1 in the first direction. The pawl 32 on the first piston rod 332 drives the inner ring 21 to rotate relative to the first connecting member 1 in the first direction, thereby adjusting the position of the drilling device 200. When the first solenoid valve 30 is energized, if the second solenoid valve 40 is de-energized, the first piston rod 332 of the first hydraulic cylinder 33 retracts, causing the rocker arm 31 to rotate relative to the first connecting member 1 in the second direction opposite to the first direction, and the rocker arm 31 returns to its original position.

[0074] Optionally, such as Figure 2 As shown, the hydraulic system also includes a relief valve 50, which is located on the connecting pipeline between the hydraulic pump 20 and the oil inlet of the first solenoid valve 30. The relief valve 50 serves to stabilize the pressure and protect the hydraulic system.

[0075] Optionally, such as Figure 2 As shown, the hydraulic system also includes a filter 60, which is installed on the connecting pipeline between the oil inlet of the hydraulic pump 20 and the oil tank 10 to filter the oil entering the hydraulic pump 20 and prevent impurities from affecting the operation of the hydraulic system.

[0076] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A downhole borehole azimuth control device, characterized in that, include: First connector (1), which is used to connect the anchoring device (100); The rotating assembly (2) includes an outer ring (21) and an inner ring (22), wherein the outer ring (21) is fixed to the top of the first connector (1), and the inner ring (22) is rotatably disposed within the outer ring (21); A drive assembly (3) is disposed on the first connector (1), the drive assembly (3) being capable of driving the inner ring (22) to rotate relative to the outer ring (21) about a first rotation axis; The second connector (4) is disposed at the top of the inner ring (22) and can rotate with the inner ring (22) relative to the outer ring (21). The second connector (4) is used to connect the drilling device (200). The inner wall of the inner ring (22) is provided with gear teeth (221) arranged sequentially along the circumference of the inner ring (22), and the drive assembly (3) includes: A rocker arm (31) is disposed at the top of the first connector (1), and the rocker arm (31) is capable of rotating relative to the first connector (1) about a second rotation axis parallel to the first rotation axis; A pawl (32) is provided at one end of the rocker arm (31) near the inner ring (22); A first hydraulic cylinder (33) is disposed on the first connecting member (1). The first hydraulic cylinder (33) can drive the rocker arm (31) to rotate relative to the first connecting member (1) about the second rotation axis in a first direction, so that the pawl (32) can drive the inner ring (22) to rotate relative to the outer ring (21) in the first direction through the gear teeth (221). The downhole drilling azimuth control device also includes a locking component (5) disposed on the first connector (1), the locking component (5) being able to lock the inner ring (22) onto the first connector (1); The locking component (5) includes: The second hydraulic cylinder (51) includes a second cylinder body (511) fixed to the top of the first connector (1) and a second piston rod (512) slidably disposed in the second cylinder body (511). A limiting member (52) is fixed to the other end of the second piston rod (512). The second piston rod (512) has a first working position and a second working position. When the second piston rod (512) is in the first working position, the limiting member (52) abuts against the gear tooth (221) to prevent the inner ring (22) from rotating relative to the outer ring (21). When the second piston rod (512) is in the second working position, the limiting member (52) disengages from the gear tooth (221), and the inner ring (22) can rotate relative to the outer ring (21).

2. The downhole borehole azimuth control device according to claim 1, characterized in that, The drive assembly (3) further includes an elastic element (34). The pawl (32) is rotatable relative to the rocker arm (31) about a third rotation axis parallel to the first rotation axis. One end of the elastic element (34) is connected to the pawl (32), and the other end is connected to the rocker arm (31). The rocker arm (31) is provided with a first limiting part (311), and the pawl (32) is provided with a second limiting part (321). The elastic element (34) can drive the pawl (32) to rotate relative to the rocker arm (31) about the third rotation axis in a second direction opposite to the first direction, so that the first limiting part (311) abuts against the second limiting part (321).

3. The downhole borehole azimuth control device according to claim 2, characterized in that, The first hydraulic cylinder (33) includes: The first cylinder (331) is capable of rotating relative to the first connecting member (1) about a fourth rotation axis parallel to the first rotation axis; The first piston rod (332) has one end slidably disposed in the first cylinder (331) and the other end rotatably connected to the rocker arm (31). The first piston rod (332) can rotate relative to the rocker arm (31) about a fifth rotation axis parallel to the first rotation axis.

4. The downhole borehole azimuth control device according to claim 1, characterized in that, The second hydraulic cylinder (51) is a single-acting hydraulic cylinder. The second hydraulic cylinder (51) also includes a second return spring (513). When the hydraulic chamber of the second hydraulic cylinder (51) is filled with liquid, the second piston rod (512) can move from the first working position to the second working position. When the hydraulic chamber of the second hydraulic cylinder (51) is discharged, the second return spring (513) can drive the second piston rod (512) to move from the second working position to the first working position.

5. The downhole borehole azimuth control device according to claim 4, characterized in that, The first connector (1) is provided with a first oil inlet (11) and a second oil inlet (12). The hydraulic chamber of the first hydraulic cylinder (33) is connected to the first oil inlet (11), and the hydraulic chamber of the second hydraulic cylinder (51) is connected to the second oil inlet (12).

6. The downhole borehole azimuth control device according to claim 5, characterized in that, It also includes a hydraulic system, which comprises: Fuel tank (10); A hydraulic pump (20) has its inlet connected to the oil tank (10); The first solenoid valve (30) has an oil outlet port connected to the oil inlet port of the first solenoid valve (30), and the first oil inlet port (11) and the second oil inlet port (12) are both connected to the working oil port of the first solenoid valve (30). The return oil port of the first solenoid valve (30) is connected to the oil tank (10). The second solenoid valve (40) is located on the connecting pipeline between the first oil inlet (11) and the working oil port of the first solenoid valve (30).

7. The downhole borehole azimuth control device according to claim 6, characterized in that, When the first solenoid valve (30) is energized, the oil inlet of the first solenoid valve (30) is connected to the working oil port, and when the first solenoid valve (30) is de-energized, the oil return port of the first solenoid valve (30) is connected to the working oil port.

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