Hydraulic balance type attitude control device

Abstract

The utility model discloses a kind of hydraulic balance posture control instruments, including fixed driving part and rotating holding part, the fixed driving part includes cylindrical shell, hollow shaft motor is arranged in the shell, the rotor of the hollow shaft motor is connected with the rotating holding part, the other end of the rotor of the hollow shaft motor is provided with pressure balancing device for keeping the spacing between the fixed driving part and the rotating holding part.The device makes the device have a certain spacing between the fixed driving part and the rotating holding part by pressure balancing device when the pressure of deep well operation is too large, effectively avoids the fixed driving part and the rotating holding part are extruded and pressed to death due to excessive pressure, causes the failure that rotating holding part cannot be adjusted and cannot rotate, and further influence the failure that logging instrument cannot work normally occurs.

Description

TECHNICAL FIELD

[0001] The present application relates to a rotary steering drilling device in the field of oil drilling engineering, in particular to a hydraulic balance type attitude control instrument. BACKGROUND

[0002] In the process of oilfield development or tunnel excavation and other underground engineering construction, in order to fully understand the formation rock and structure characteristics, horizontal drilling work is usually carried out and is matched with horizontal well logging operation. Horizontal well logging mainly relies on drilling tools to drive logging probes to measure in the well. The logging probe is built-in with multiple sensors, and different types of probes have different sensors. Each sensor has a specific detection direction. During the logging operation, due to the limitation of logging equipment and the material of the equipment itself, gravity will cause the logging equipment to have an eccentric phenomenon that the probe is deviated to the bottom. In the long distance pushing process, it may cause the logging probe to have uncontrollable deflection in the well, which leads to the fact that the adhesion effect of the probe sensor and the medium (hole wall) cannot be guaranteed, thereby causing abnormal test data.

[0003] The existing solutions mainly use centralizers to make the logging equipment as close as possible to the well wall to reduce the generation of abnormal data, or use software processing methods to correct the test data later, but they cannot control or guarantee the angle of adhesion of the probe sensor and the medium (hole wall), so they cannot directly obtain stable and correct signal data. Or use logging rotary sub, but the function of the rotary sub is to rotate the upper and lower parts of the instrument relative to each other. It does not have an electric circuit and does not have a function of azimuth measurement. It also does not have a motor for control, so it cannot fix the lower instrument to a certain angle.

[0004] The Chinese patent application with publication number CN110318733A provides a logging device for horizontal well logging, an integrated probe and a control method thereof. The horizontal well logging device includes a conveying part and an integrated probe, and the conveying part is fixedly connected with the integrated probe. The integrated probe includes a detection part and an adhesion control part, and the detection part is fixedly connected with the adhesion control part. The adhesion control part includes a body, a driving device, a control unit and a gravity sensing unit. The gravity sensing unit can detect the deflection angle of the integrated probe relative to gravity, and the control unit controls the driving device to drive the integrated probe to rotate to achieve the effect of adjusting the adhesion angle. The horizontal well logging device of the application uses the gravity sensing method to detect the deflection angle of the integrated probe relative to the gravity direction, so that the integrated probe can be rotated to a preset state, thereby ensuring that the detection sensor in the detection part is in adhesion with the well wall.

[0005] However, when measuring in a deep well, due to the existence of a large liquid pressure in the well, the probe is pressed against the driving device. Due to the limitation of conditions, the power of the driving device cannot be infinite, so it is easy to cause the driving device to be unable to rotate, thereby causing the angle to be unable to be adjusted, resulting in the occurrence of the fault of abnormal test data.

[0006] Therefore, how to avoid the probe from being pressed to death and cause the angle to be unable to be adjusted to cause the test data to be abnormal is a technical problem to be solved by those skilled in the art. SUMMARY

[0007] The present application aims to provide a hydraulic balance type attitude control instrument, through a pressure balancing device, so that the device has a certain spacing between the fixed driving part and the rotating holding part when the pressure is too large in deep well operation, effectively avoiding the fixed driving part and the rotating holding part from being pressed to death due to excessive pressure, causing the rotating holding part to be unable to be adjusted and rotated, and further affecting the normal work of the logging instrument.

[0008] To achieve the above-mentioned purpose, the present application provides a hydraulic balance type attitude control instrument,

[0009] A hydraulic balance type attitude control instrument, comprising: a fixed driving part and a rotating holding part, the fixed driving part comprising a cylindrical shell, a hollow shaft motor is arranged in the shell, one end of the rotor of the hollow shaft motor is connected with the rotating holding part, and the other end of the rotor of the hollow shaft motor is provided with a pressure balancing device for maintaining the spacing between the fixed driving part and the rotating holding part.

[0010] Further, the pressure balancing device comprises a balance cavity arranged in the fixed driving part, the balance cavity is divided into a pressure cavity and an adjusting cavity by a balance piston, the pressure cavity is located close to the hollow shaft motor, a spring for pushing the balance piston is arranged in the adjusting cavity, and the adjusting cavity is provided with a balance hole in communication with the external environment.

[0011] Further, the pressure cavity is provided with insulating oil.

[0012] Further, the fixed driving part is provided with a T-shaped hollow shaft, one end of the T-shaped hollow shaft is provided with a first pressure block for blocking external connection, the first pressure block is provided with a plurality of wires for connecting the circuit at both ends of the first pressure block, and the other end of the T-shaped hollow shaft is provided with a multi-core slip ring, and the multi-core slip ring is connected with the hollow pipe of the rotor of the hollow shaft motor away from one end of the T-shaped hollow shaft.

[0013] Further, the two ends of the rotating holding part are respectively provided with a second pressure block and a third pressure block for blocking external connection, and the second pressure block and / or the third pressure block are provided with a plurality of wires for connecting the circuit at both ends of the second pressure block and / or the third pressure block.

[0014] Further, the second pressure block and the third pressure block are provided with an attitude control module.

[0015] Furthermore, an upper joint is provided at one end of the fixed driving portion away from the rotation holding portion.

[0016] Furthermore, the upper joint is a standard joint connected to a well logging instrument.

[0017] Furthermore, a lower joint is provided at one end of the rotation holding portion away from the fixed driving portion.

[0018] Furthermore, the lower connector is a standard connector for connecting to a test module.

[0019] Compared with the prior art, the hydraulically balanced attitude controller provided by the present invention drives the rotating holding part to rotate to a certain angle through the power device such as the motor in the fixed driving part when working, and locates it in a position where the logging instrument can better exert its performance, thereby performing logging operations; in this process, through the pressure balancing device, when the pressure of deep well operation is too high, a certain distance is created between the fixed driving part and the rotating holding part, effectively avoiding the situation where the fixed driving part and the rotating holding part are squeezed and pressed to death due to excessive pressure, resulting in the inability to adjust the rotating holding part and rotate, thereby affecting the occurrence of malfunctions that cause the logging instrument to fail to work properly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Attachment Figure 1 It is a structural diagram of a hydraulically balanced attitude controller;

[0022] In the accompanying drawings: 101 is the upper joint, 102 is the first pressure-bearing block, 103 is the T-shaped hollow shaft, 104 is the spring, 105 is the balancing hole, 106 is the adjusting chamber, 107 is the balancing piston, 108 is the pressure chamber, 109 is the stator, 110 is the multi-core slip ring, 111 is the thrust bearing, 112 is the rotor, 113 is the upper bearing, 114 is the sealing ring, 115 is the lower bearing, 201 is the second pressure-bearing block, 202 is the attitude control module, 203 is the third pressure-bearing block, and 204 is the lower joint. DETAILED DESCRIPTION

[0023] The core of the present application is to provide a hydraulic balance type attitude control instrument, through the pressure balance device, when the deep well operation pressure is too large, the fixed driving part and the rotating holding part have a certain spacing, effectively avoiding the fixed driving part and the rotating holding part being squeezed and pressed to death due to excessive pressure, causing the rotating holding part to be unable to rotate, and further affecting the failure of the logging instrument to work normally.

[0024] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and embodiments.

[0025] As shown in the drawings, Figure 1 A hydraulic balance type attitude control instrument, comprising: a fixed driving part and a rotating holding part, the fixed driving part comprising a cylindrical shell, a hollow shaft motor is arranged in the shell, one end of the rotor 112 of the hollow shaft motor is connected with the rotating holding part, and the other end of the rotor 112 of the hollow shaft motor is provided with a pressure balance device for maintaining the spacing between the fixed driving part and the rotating holding part.

[0026] When the device works, the motor in the fixed driving part drives the rotating holding part to rotate to a certain angle, which is more suitable for the performance position of the logging instrument, so as to perform logging operation; in this process, through the pressure balance device, when the deep well operation pressure is too large, the fixed driving part and the rotating holding part have a certain spacing, effectively avoiding the fixed driving part and the rotating holding part being squeezed and pressed to death due to excessive pressure, causing the rotating holding part to be unable to rotate, and further affecting the failure of the logging instrument to work normally.

[0027] In one specific embodiment, further, the pressure balance device comprises a balance cavity arranged in the fixed driving part, the balance cavity is a cavity in the shell, the balance cavity is divided into a pressure cavity 108 and an adjusting cavity 106 by a balance piston 107, the pressure cavity 108 is located close to the hollow shaft motor side, the adjusting cavity 106 is provided with a spring 104 for pushing the balance piston 107, and the adjusting cavity 106 is provided with a balance hole 105 in communication with the external environment; when working, the spring 104 applies a certain pressure to the balance piston 107, the pressure cavity 108 applies a certain pressure to the motor rotor 112, and the rotating holding part arranged at the hollow shaft end of the rotor 112 maintains a spacing with the fixed driving part.

[0028] In a specific embodiment, further, the pressure cavity 108 is provided with insulating oil, which provides lubrication for the movement of the balance piston 107, and more importantly, effectively seals the hollow shaft motor, preventing external sewage from entering and damaging the seal of the hollow shaft motor winding, thereby affecting the performance of the hollow shaft motor, and effectively maintaining the service life of the hollow shaft motor.

[0029] In a specific embodiment, further, the fixed driving part is provided with a T-shaped hollow shaft 103, one end of the T-shaped hollow shaft 103 is provided with a first pressure block 102 for blocking external connection, the first pressure block 102 is provided with a plurality of wires for connecting the circuit at both ends of the first pressure block 102; the other end of the T-shaped hollow shaft 103 is provided with a multi-core slip ring 110, which is connected to the hollow pipe of the rotor 112 of the hollow shaft motor away from one end of the T-shaped hollow shaft 103; in actual operation, the stator 109 of the hollow shaft motor is connected with the shell of the fixed driving part, the hollow pipe of the rotor 112 of the hollow shaft motor is provided with a thrust bearing 111 radially with the shell of the fixed driving part, for bearing the pressure generated by the pressure cavity 108 between the hollow pipe of the rotor 112 of the hollow shaft motor and the shell; the hollow pipe of the rotor 112 of the hollow shaft motor is sleeved with an upper bearing 113 and a lower bearing 115 near one end of the rotating retaining part, for bearing the radial force between the hollow pipe of the rotor 112 of the hollow shaft motor and the shell, and keeping the hollow pipe of the rotor 112 of the hollow shaft motor rotating stably, the hollow pipe of the rotor 112 of the hollow shaft motor between the upper bearing 113 and the lower bearing 115 is further sleeved with at least one sealing ring 114, which realizes the sealing of the hollow shaft motor; further, the two ends of the rotating retaining part are respectively provided with a second pressure block 201 and a third pressure block 203 for blocking external connection, the second pressure block 201 and / or the third pressure block 203 are provided with a plurality of wires for connecting the circuit at both ends of the second pressure block 201 and / or the third pressure block 203. The device provides a wire channel for the circuit part through the T-shaped hollow shaft 103 and the hollow pipe of the rotor 112, realizes the sealing of the device and the external environment by using the first pressure block 102, the second pressure block 201 and the third pressure block 203 respectively, and realizes the normal connection of the wire with the bottom electrical component when the rotating retaining part rotates by using the multi-core slip ring 110, so as to realize a good wire working channel.

[0030] In a specific embodiment, further, a posture control module 202 is provided between the second pressure block 201 and the third pressure block 203, the posture control module 202 includes a gyroscope and other circuit devices for measuring azimuth angle.

[0031] In one specific embodiment, further, the fixed driving part is provided with an upper joint 101 at one end away from the rotating holding part; and further, the upper joint 101 is a standard joint for connecting with the logging instrument.

[0032] In one specific embodiment, further, the rotating holding part is provided with a lower joint 204 at one end away from the fixed driving part; and further, the lower joint 204 is a standard joint for connecting with the testing module.

[0033] Finally, it is also necessary to point out that, in this document, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0034] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the relevant part can be referred to the method part.

[0035] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulically balanced attitude controller, characterized in that: include: A fixed drive unit and a rotation holding unit, wherein the fixed drive unit comprises a cylindrical shell, a hollow shaft motor is arranged in the shell, one end of a rotor (112) of the hollow shaft motor is connected to the rotation holding unit, and the other end of the rotor (112) of the hollow shaft motor is provided with a pressure balancing device for maintaining the distance between the fixed drive unit and the rotation holding unit; The pressure balancing device includes a balancing chamber provided in the fixed drive portion, the balancing chamber being divided into a pressure chamber (108) and an adjustment chamber (106) by a balancing piston (107), the pressure chamber (108) being located on a side close to the hollow shaft motor, the adjustment chamber (106) being provided with a spring (104) for pushing the balancing piston (107), and the adjustment chamber (106) being provided with a balancing hole (105) communicating with an external environment; insulating oil is provided in the pressure chamber (108); The fixed drive portion is provided with a T-shaped hollow shaft (103), one end of the T-shaped hollow shaft (103) is provided with a first pressure-bearing block (102) for isolating external connections, and the first pressure-bearing block (102) is provided with a plurality of wires for connecting circuits at both ends of the first pressure-bearing block (102); the other end of the T-shaped hollow shaft (103) is provided with a multi-core slip ring (110), and the end of the multi-core slip ring (110) away from the T-shaped hollow shaft (103) is connected to the hollow tube of the rotor (112) of the hollow shaft motor; A second pressure-bearing block (201) and a third pressure-bearing block (203) for isolating external connections are respectively provided at both ends of the rotation retaining portion, and the second pressure-bearing block (201) and / or the third pressure-bearing block (203) are provided with a plurality of wires for connecting circuits at both ends of the second pressure-bearing block (201) and / or the third pressure-bearing block (203).

2. The hydraulically balanced attitude controller according to claim 1, characterized in that: A posture control module (202) is provided between the second pressure-bearing block (201) and the third pressure-bearing block (203).

3. The hydraulically balanced attitude controller according to claim 1, characterized in that: An upper joint (101) is provided at one end of the fixed driving portion away from the rotation retaining portion.

4. The hydraulically balanced attitude controller according to claim 3, characterized in that: The upper joint (101) is a standard joint for connecting to a well logging instrument.

5. The hydraulically balanced attitude controller according to claim 1, characterized in that: A lower joint (204) is provided at one end of the rotation retaining portion away from the fixed driving portion.

6. The hydraulically balanced attitude controller according to claim 5, characterized in that: The lower connector (204) is a standard connector for connecting to a test module.

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