A rotary guide adjuster

Abstract

This application relates to a rotary guide adjuster, including a housing assembly, a flow channel located inside the housing assembly, a turbine generator module and a servo motor module disposed inside the housing assembly, a connecting base disposed inside the housing assembly and connected to the servo motor module, a hydraulic damping connector disposed on the connecting base, and a drill bit connection hole disposed on the end of the hydraulic damping connector away from the connecting base. The turbine generator module is electrically connected to the servo motor module, and the hydraulic damping connector is connected to the servo motor module. The servo motor module is used to drive the hydraulic damping connector to rotate, and a pressure transition zone is generated inside the hydraulic damping connector. The rotary guide adjuster disclosed in this application reduces the impact of drill bit vibration on the built-in sensor integrated block during drilling through an active vibration isolation method, making the parameter detection data during drilling more accurate, thereby improving the consistency between the actual drilling trajectory and the required drilling trajectory.

Description

Technical Field

[0001] This application relates to the field of downhole guidance control technology, and in particular to a rotary guide adjuster. Background Art

[0002] The rotary steering adjuster (or rotary steering controller) is the core control unit of the rotary steered drilling system (RSS). It is responsible for adjusting the drill bit direction in real time while the drill string is rotating, so as to achieve precise wellbore trajectory control. The specific working principle is to achieve real-time adjustment of the drill bit direction by combining real-time measurement, command parsing and dynamic control with surface control.

[0003] In actual use, real-time measurement is achieved by using built-in sensor integrated blocks (such as triaxial accelerometers, magnetometers, and gyroscopes) to detect parameters such as well inclination angle, azimuth angle, and tool face. When drilling across media or advancing in non-uniform media, the resulting vibrations will directly affect the detection accuracy of the built-in sensor integrated blocks. Summary of the Invention

[0004] This application provides a rotary guide adjuster that reduces the impact of drill bit vibration on the built-in sensor integrated block during drilling through an active vibration isolation method, thereby making the parameter detection data during drilling more accurate and improving the consistency between the actual drilling trajectory and the required drilling trajectory.

[0005] The above-mentioned objective of this application is achieved through the following technical solution:

[0006] This application provides a rotary guide adjuster, comprising:

[0007] The housing assembly has an internal flow channel and has a proximal end and a distal end.

[0008] Both the turbine generator module and the servo motor module are located inside the housing assembly, with the turbine generator module positioned in front of the servo motor module in the direction from the near end to the far end.

[0009] The connecting base is located inside the housing assembly and is connected to the servo motor module;

[0010] The hydraulic shock absorber connector is located on the connecting base;

[0011] The drill bit connection hole is located on the end of the hydraulic shock-absorbing connector that is furthest from the connecting base.

[0012] The turbine generator module is electrically connected to the servo motor module.

[0013] The hydraulic shock absorber connector is connected to the servo motor module, which drives the hydraulic shock absorber connector to rotate, creating a pressure transition zone inside the hydraulic shock absorber connector.

[0014] In one possible implementation of the first aspect, the connecting base includes:

[0015] The base assembly is located inside the outer shell assembly, and there is a gap between the outer wall of the base assembly and the inner wall of the outer shell assembly;

[0016] Pistons are evenly distributed in the circumferential direction of the base assembly and are slidably connected to the base assembly;

[0017] The hydraulic chamber is located inside the base assembly and communicates with the space where the plunger is located.

[0018] An adjusting component is located in an adjusting hole on the base assembly, and the adjusting component is slidably connected to the base assembly.

[0019] The servo motor module and the adjustment component are connected in a rigid manner.

[0020] The adjusting hole is connected to the hydraulic chamber;

[0021] The servo motor module can move towards and away from the base assembly.

[0022] In one possible implementation of the first aspect, the servo motor module includes:

[0023] The base is located inside the outer casing assembly;

[0024] The servo motor is slidably connected to the base.

[0025] The linear drive, mounted on the base and connected to the servo motor, is also electrically connected to the turbine generator module.

[0026] In one possible implementation of the first aspect, a portion of the adjusting element also extends into the hydraulic chamber.

[0027] In one possible implementation of the first aspect, the hydraulic damping connector includes:

[0028] A hydraulic base assembly is mounted on a connecting base, and the hydraulic base assembly has an open connecting cavity.

[0029] The transition connection assembly is slidably connected to the hydraulic base assembly via an open connection cavity;

[0030] A hydraulic regulator, located on the hydraulic base assembly and connected to the open connection cavity, is used to make contact and create a gap between the working surface of the hydraulic base assembly and the working surface of the transition connection assembly.

[0031] In one possible implementation of the first aspect, connecting protrusions are provided on both the working surface of the hydraulic base assembly and the working surface of the transition connection assembly.

[0032] In one possible implementation of the first aspect, the connecting protrusion is arc-shaped on a plane parallel to the working surface of the hydraulic base assembly or the working surface of the transition connection assembly.

[0033] In one possible implementation of the first aspect, the hydraulic regulator includes:

[0034] The hydraulic chamber and hydraulic actuator are both located on the hydraulic base assembly;

[0035] The output end of the hydraulic actuator is connected to the adjustment end of the hydraulic chamber, and the hydraulic actuator is electrically connected to the turbine generator module.

[0036] The hydraulic chamber is connected to an open connection cavity.

[0037] In one possible implementation of the first aspect, the hydraulic chamber is annular in shape;

[0038] The hydraulic chamber and the open connection cavity have multiple connection channels, which are evenly arranged around the axis of the hydraulic base assembly.

[0039] In one possible implementation of the first aspect, the number of hydraulic actuators is multiple and they are evenly arranged around the axis of the hydraulic base assembly.

[0040] The beneficial effects of this application are as follows:

[0041] The rotary steering adjuster disclosed in this application provides both local power output and ground power output during drilling. These two power output methods can meet the requirements for forward movement and directional adjustment. At the same time, it reduces the impact of drill bit vibration on the built-in sensor integrated block through active vibration isolation, so that the parameter detection data during drilling can be more accurate. Attached Figure Description

[0042] Figure 1 This is a structural schematic diagram of a rotary guide adjuster provided in this application.

[0043] Figure 2 Based on Figure 1 A schematic diagram of the drilling fluid flow path is provided.

[0044] Figure 3 This is a structural schematic diagram of a connecting base provided in this application.

[0045] Figure 4 This is a structural schematic diagram of a servo motor module provided in this application.

[0046] Figure 5 This is a structural schematic diagram of another servo motor module provided in this application.

[0047] Figure 6 This is a structural schematic diagram of a hydraulic shock-absorbing connector provided in this application.

[0048] Figure 7 This is a schematic diagram of the distribution of connecting protrusions in a hydraulic base assembly provided in this application.

[0049] Figure 8 This is a schematic diagram showing the distribution of another type of connecting protrusion in the hydraulic base assembly provided in this application.

[0050] In the diagram, 1. Housing assembly, 2. Turbine generator module, 3. Servo motor module, 4. Connecting base, 5. Hydraulic shock absorber connector, 6. Drill bit connection hole, 11. Guide channel, 41. Base assembly, 42. Piston, 43. Hydraulic chamber, 44. Adjusting component, 31. Base, 32. Servo motor, 33. Linear actuator, 51. Hydraulic base assembly, 52. Open connecting chamber, 53. Transition connecting assembly, 54. Hydraulic regulator, 541. Hydraulic chamber, 542. Hydraulic actuator. Detailed Implementation

[0051] The technical solutions in this application will be further described in detail below with reference to the accompanying drawings.

[0052] This application discloses a rotary guide adjuster. In some examples, the rotary guide adjuster disclosed in this application includes a housing assembly 1, a turbine generator module 2, a servo motor module 3, a connecting base 4, a hydraulic shock absorber connector 5, and a drill bit connecting hole 6.

[0053] It should be noted that the technical solution disclosed in this application is a technical improvement on the existing rotary guide adjuster, which enables it to have active vibration isolation function. Therefore, the housing assembly 1 in this application refers to the collection of components that can perform the required functions of the rotary guide adjuster during use.

[0054] Please see Figure 1 and Figure 2 The housing assembly 1 has a proximal end and a distal end, where the proximal end refers to the end away from the drill bit and the distal end refers to the end closer to the drill bit.

[0055] The housing assembly 1 has a flow channel 11 inside, which is used to supply drilling fluid. After the drilling fluid flows through the pipe and the rotary guide regulator, it finally flows out from the drill bit and returns to the surface. During the drilling process, the two main functions of the drilling fluid are flushing and removing cuttings and high-temperature protection.

[0056] exist Figure 2 As can be seen, channels (not shown) need to be added inside the drill bit to allow drilling fluid to flow. After the drilling fluid returns to the surface, it undergoes sedimentation, filtration, and other related treatments before being recycled.

[0057] In this application, there is a gap between the outer wall of the part of the drill bit located inside the housing assembly 1 and the inner wall of the housing assembly 1. The gap serves two purposes: to allow drilling fluid to flow and to prevent the vibration generated by the drill bit during operation from being transmitted to the housing assembly 1.

[0058] Both the turbine power generation module 2 and the servo motor module 3 are installed inside the housing assembly 1. From the positional perspective, in the direction from the near end to the far end of the housing assembly 1, the turbine power generation module 2 is located in front of the servo motor module 3. The turbine power generation module 2 is electrically connected to the servo motor module 3 and can supply power to the servo motor module 3.

[0059] The function of turbine generator module 2 is to convert some of the kinetic energy in the drilling fluid flow process into electrical energy to supply the servo motor module 3 and other components that require electricity. The function of servo motor module 3 is to convert electrical energy into kinetic energy to drive the components that need to perform corresponding actions.

[0060] The connecting base 4 is installed inside the housing assembly 1 and connected to the servo motor module 3. The hydraulic shock absorber connector 5 is installed on the connecting base 4 and connected to the servo motor module 3. There is a drill bit connection hole 6 on the end of the hydraulic shock absorber connector 5 away from the connecting base 4. The drill bit connection hole 6 is generally an internal thread hole and its function is to connect a drill bit.

[0061] The servo motor module 3 is used to drive the hydraulic shock absorber connector 5 to rotate. Specifically, the purpose of driving the hydraulic shock absorber connector 5 here is to achieve active drilling. That is, the power for the drill bit to rotate is no longer provided by the ground, but by the servo motor module 3. The advantage of this forward movement is high precision and it is suitable for directional forward movement.

[0062] The hydraulic damping connector 5 generates a pressure transition zone inside. The purpose of driving the hydraulic damping connector 5 to generate a pressure transition zone is to isolate vibration. The vibration encountered by the drill bit during its advance is as follows:

[0063] Axial vibration: The periodic impact of the drill bit on the rock induces longitudinal fluctuations, and excessive amplitude can lead to drill jumping.

[0064] Lateral vibration: Centrifugal instability of the drill string or collision with the well wall causes lateral oscillation, which induces vortices, and is divided into forward / backward regular vortices and irregular vortices.

[0065] The function of the hydraulic damping connector 5 is to absorb vibration by adjusting the volume of the pressure transition zone. Specifically, when vibration occurs, the pressure in the pressure transition zone changes, and the volume of the pressure transition zone is actively adjusted to keep the pressure in the pressure transition zone constant. This method can achieve active absorption of drill bit vibration.

[0066] The hydraulic shock-absorbing connector 5 is located between the built-in sensor integrated block and the drill bit. It can significantly reduce the vibration felt by the built-in sensor integrated block, enabling it to work in a more stable environment and helping to make the feedback data from the built-in sensor integrated block more accurate.

[0067] In some examples, please refer to Figure 3 The connecting base 4 includes a base assembly 41, a plunger 42, a hydraulic chamber 43, and an adjusting member 44. The base assembly 41 is located inside the housing assembly 1, and there is a gap between the outer wall of the base assembly 41 and the inner wall of the housing assembly 1.

[0068] The plungers 42 are evenly distributed in the circumferential direction of the base assembly 41 and are slidably connected to the base assembly 41. The plungers 42 are generally located inside the base assembly 41. When needed, one end of the plunger 42 will extend out of the base assembly 41 and abut against the inner wall of the outer casing assembly 1.

[0069] The hydraulic chamber 43 is located inside the base assembly 41 and communicates with the space where the plunger 42 is located.

[0070] The adjusting element 44 is disposed in the adjusting hole on the base assembly 41. The adjusting element 44 is connected to the base assembly 41 by a sliding connection, such as a keyed connection or a splined connection. The adjusting hole communicates with the hydraulic chamber 43, so that the volume of the hydraulic chamber 43 can be changed by moving the adjusting element 44, thereby adjusting the state (extended, retracted) of the plunger 42.

[0071] In some possible implementations, the cross-sectional shape of the adjusting member 44 is rectangular, and a sealing ring is added between the adjusting member 44 and the adjusting hole on the base assembly 41 for sealing.

[0072] The servo motor module 3 is rigidly connected to the adjustment component 44. In addition, the servo motor module 3 can move towards and away from the base assembly 41 to drive the adjustment component 44 to change its position.

[0073] In some possible implementations, a portion of the adjusting member 44 extends into the hydraulic chamber 43 to make the action of the plunger 42 more consistent. This is because, in actual use, a pressure gradient will inevitably occur inside the hydraulic chamber 43, and extending a portion of the adjusting member 44 into the hydraulic chamber 43 can alleviate the pressure gradient to some extent.

[0074] Furthermore, the portion of the adjusting member 44 that extends into the hydraulic chamber 43 adopts a stepped structure.

[0075] The purpose of using the connecting base 4 here is to improve torsional resistance. This is because the diameter of the torque transmission component (servo motor shaft) in the servo motor module 3 is limited by size. When facing relatively hard geological layers, there is a potential risk of damage to the torque transmission component in the servo motor module 3.

[0076] When using the connecting base 4, the drive mode of the servo motor module 3 can be adjusted to the ground drive mode. In this mode, the power for the drill bit to rotate is provided by the ground equipment. The connecting base 4 can freely switch between ground drive and servo motor module 3 drive.

[0077] In some examples, please refer to Figure 4 and Figure 5 The servo motor module 3 includes a base 31, a servo motor 32, and a linear driver 33. Both the servo motor 32 and the linear driver 33 are mounted on the base 31, which is fixedly installed inside the housing assembly 1.

[0078] The servo motor 32 is connected to the base 31 by a sliding connection. The linear driver 33 is connected to the servo motor 32 and is also electrically connected to the turbine power generation module 2. The servo motor 32 is also electrically connected to the turbine power generation module 2. The turbine power generation module 2 supplies power to both the servo motor 32 and the linear driver 33.

[0079] The base 31 is available in two types: independent and ring-shaped. A stabilizing ring is added in the circumferential direction of the servo motor 32. The purpose of the stabilizing ring is to ensure that the servo motor 32 can move stably.

[0080] In some examples, please refer to Figure 6 The hydraulic shock absorber connector 5 includes a hydraulic base assembly 51, an open connection cavity 52, a transition connection assembly 53, and a hydraulic regulator 54. The hydraulic base assembly 51 is fixedly installed on the connection base 4. The open connection cavity 52 is disposed on the hydraulic base assembly 51. The transition connection assembly 53 is slidably connected to the hydraulic base assembly 51 through the open connection cavity 52.

[0081] When the relative positions of the hydraulic base assembly 51 and the transition connection assembly 53 change, the volume of the open connection cavity 52 will also change synchronously.

[0082] The hydraulic regulator 54 is mounted on the hydraulic base assembly 51 and connected to the open connection cavity 52. ​​The hydraulic regulator 54 is used to make contact and create a gap between the working surface of the hydraulic base assembly 51 and the working surface of the transition connection assembly 53.

[0083] The function of the hydraulic regulator 54 in bringing the working surface of the hydraulic base assembly 51 into contact with the working surface of the transition connection assembly 53 is to transmit driving force so that the drill bit can rotate.

[0084] The purpose of the hydraulic adjuster 54 in creating a gap between the working surface of the hydraulic base assembly 51 and the working surface of the transition connection assembly 53 is to isolate vibration.

[0085] For some possible implementations, please refer to Figure 7 The hydraulic base assembly 51 and the transition connection assembly 53 are provided with connecting protrusions. The function of the connecting protrusions is to increase the contact area, ensure the stability of the driving force transmission, and reduce the transmission loss of the driving force.

[0086] Further, please refer to Figure 8 It is required that the shape of the connecting protrusion be arc-shaped on the plane parallel to the working surface of the hydraulic base assembly 51 or the working surface of the transition connection assembly 53. This can increase the length of the connecting protrusion and further increase the contact area.

[0087] In some examples, the hydraulic regulator 54 includes a hydraulic chamber 541 and a hydraulic actuator 542, both of which are fixedly mounted on the hydraulic base assembly 51. The output end of the hydraulic actuator 542 is connected to the adjustment end of the hydraulic chamber 541. The hydraulic actuator 542 is electrically connected to the turbine generator module 2. The hydraulic chamber 541 is connected to the open connection cavity 52.

[0088] In some possible implementations, the number of hydraulic actuators 542 is three.

[0089] In some possible implementations, the hydraulic actuator 542 includes a motor and a telescopic cylinder connected together, with the power output from the motor being transmitted to the telescopic cylinder, and the length of the piston in the telescopic cylinder extending into the hydraulic chamber 541 changing.

[0090] At this point, by using a sensor (for pressure detection) installed on the hydraulic chamber 541, constant pressure control of the internal pressure of the hydraulic chamber 541 can be achieved.

[0091] In some possible implementations, the hydraulic chamber 541 is annular in shape, and the hydraulic chamber 541 and the open connection cavity 52 have multiple connection channels, which are evenly arranged around the axis of the hydraulic base assembly 51.

[0092] In some possible implementations, the number of hydraulic actuators 542 is multiple and they are evenly arranged around the axis of the hydraulic base assembly 51.

[0093] In some possible implementations, the hydraulic actuator 542 is powered by an electric slip ring, with the input of the slip ring electrically connected to the turbine generator module 2 and the output of the slip ring electrically connected to the hydraulic actuator 542.

[0094] The purpose of both methods is to ensure that the pressure in the open connection cavity 52 can be distributed quickly and stably, thereby making the gap width uniform in all parts of the open connection cavity 52 and avoiding jamming.

[0095] It should be noted that the technical solution disclosed in this application also involves a controller. The controller can be the controller inside the built-in sensor integrated circuit, or a separate controller (such as STM32) can be used for control.

[0096] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rotary guide adjuster, characterized in that, include: The housing assembly (1) has a flow channel (11) inside and has a proximal end and a distal end; The turbine power generation module (2) and the servo motor module (3) are both located inside the housing assembly (1). In the direction from the proximal end to the distal end, the turbine power generation module (2) is located in front of the servo motor module (3). The connecting base (4) is located inside the housing assembly (1) and connected to the servo motor module (3); A hydraulic shock absorber connector (5) is provided on the connecting base (4); The drill bit connection hole (6) is located on the end of the hydraulic shock absorber connector (5) away from the connecting base (4); Among them, the turbine generator module (2) is electrically connected to the servo motor module (3); The hydraulic shock absorber connector (5) is connected to the servo motor module (3). The servo motor module (3) is used to drive the hydraulic shock absorber connector (5) to rotate. A pressure transition zone is generated inside the hydraulic shock absorber connector (5). The connecting base (4) includes: The base assembly (41) is located inside the outer shell assembly (1), and there is a gap between the outer wall of the base assembly (41) and the inner wall of the outer shell assembly (1); Pistons (42) are evenly distributed in the circumferential direction of the base assembly (41) and are slidably connected to the base assembly (41); The hydraulic chamber (43) is located inside the base assembly (41) and communicates with the space where the plunger (42) is located; An adjusting component (44) is provided in an adjusting hole on the base assembly (41), and the adjusting component (44) is slidably connected to the base assembly (41); The servo motor module (3) and the adjusting component (44) are connected in a rigid manner; The adjusting hole is connected to the hydraulic chamber (43); The servo motor module (3) can move toward and away from the base assembly (41); The hydraulic shock absorber connector (5) includes: The hydraulic base assembly (51) is located on the connecting base (4), and the hydraulic base assembly (51) is provided with an open connecting cavity (52). The transition connection assembly (53) is slidably connected to the hydraulic base assembly (51) through the open connection cavity (52); A hydraulic regulator (54) is provided on the hydraulic base assembly (51) and connected to the open connection cavity (52). The hydraulic regulator (54) is used to make contact and create a gap between the working surface of the hydraulic base assembly (51) and the working surface of the transition connection assembly (53).

2. The rotary guide adjuster according to claim 1, characterized in that, The servo motor module (3) includes: The base (31) is located inside the housing assembly (1); The servo motor (32) is slidably connected to the base (31); A linear drive (33) is mounted on a base (31) and connected to a servo motor (32). The linear drive (33) is also electrically connected to a turbine generator module (2).

3. The rotary guide adjuster according to claim 1, characterized in that, A portion of the adjusting element (44) also extends into the hydraulic chamber (43).

4. The rotary guide adjuster according to claim 1, characterized in that, Connecting protrusions are provided on both the working surface of the hydraulic base assembly (51) and the working surface of the transition connection assembly (53).

5. The rotary guide adjuster according to claim 4, characterized in that, On a plane parallel to the working surface of the hydraulic base assembly (51) or the working surface of the transition connection assembly (53), the shape of the connecting protrusion is arc-shaped.

6. The rotary guide adjuster according to claim 1, characterized in that, The hydraulic regulator (54) includes: The hydraulic chamber (541) and the hydraulic actuator (542) are both located on the hydraulic base assembly (51); The output end of the hydraulic actuator (542) is connected to the adjustment end of the hydraulic chamber (541), and the hydraulic actuator (542) is electrically connected to the turbine generator module (2). The hydraulic chamber (541) is connected to the open connection chamber (52).

7. The rotary guide adjuster according to claim 6, characterized in that, The hydraulic chamber (541) is annular in shape; The hydraulic chamber (541) and the open connection cavity (52) have multiple connection channels, which are evenly arranged around the axis of the hydraulic base assembly (51).

8. The rotary guide adjuster according to claim 6 or 7, characterized in that, The number of hydraulic actuators (542) is multiple and they are evenly arranged around the axis of the hydraulic base assembly (51).

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