Underground rotary guiding device for oil exploitation and adjusting method

Abstract

The invention relates to the technical field of directional drilling, in particular to an oil exploitation underground rotary guiding device and an adjusting method.The oil exploitation underground rotary guiding device comprises a cylindrical shell, a driving shaft with a first axial flow channel in the middle and a driven shaft with a second axial flow channel in the middle, and a supporting inner ring table is arranged on the inner side of the left end of the cylindrical shell; the inner side of the supporting inner ring table and the outer side of the left portion of the driving shaft are rotationally installed together, and the axis of the driving shaft coincides with the axis of the cylindrical shell. The rotary guiding device is reasonable and compact in structure, the guiding disc can be controlled to incline at any angle within the adjusting range only by adjusting the telescopic length of the piston rod of each hydraulic cylinder, the inclined guiding disc can drive the driven shaft to be bent and adjusted according to the preset angle and direction through the sleeve, the mechanical structure of the rotary guiding device is greatly simplified, and the working efficiency is improved. The number of parts is reduced, reliability and stability are improved, meanwhile, control parameters and control programs of the rotary guiding device are simplified, and therefore the response speed and control precision of adjustment control are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of directional drilling, and is an underground rotary guide device for oil production and an adjustment method. Background Art

[0002] The Rotary Steerable System (RSS) is developed on the basis of the traditional sliding steer drilling system. It mainly uses the bottom steer actuator to change the azimuth and well inclination of the drill string while rotating, thereby achieving the purpose of automatic steering. The rotary steer drilling system adopts the measurement while drilling technology. The microprocessor installed downhole can collect the bottom hole conditions in real time, transmit them to the ground through the drilling fluid, and form a two-way closed-loop control between the ground and the bottom of the well, thereby achieving automatic steering. Since the rotary steer drilling tool is rotary drilling, compared with the traditional sliding steer drilling tool, it overcomes the disadvantage of large friction resistance during drilling, reduces the number of trips, and the wellbore quality is relatively smooth, which can effectively improve the development efficiency and economic benefits of oil and gas wells.

[0003] At present, rotary steerable drilling tools can be divided into push-type and pointing type according to the action mode of the steering mechanism, and can be divided into dynamic type and static type according to whether the outer tube of the steering tool rotates. Among them, the push-type refers to the action of the steering mechanism on the well wall, and the reaction force generated is used to control the direction of the drill bit. This method can obtain a large bias force at the drill bit, but it is easy to produce a spiral wellbore. Its steering ability is limited by the formation structure. The steering ability in soft formations is poor, which is easy to cause underground accidents; the pointing type refers to the guiding mechanism inside the tool exerting force on the drill bit connecting shaft, thereby controlling the direction of the drill bit. This method drills a smoother and more regular wellbore, has a strong steering ability and is not affected by the formation, which is conducive to improving the quality of the wellbore and ensuring underground safety.

[0004] Conventional static offset directional rotary directional drilling tools, during the drilling process, their directional actuator does not rotate with the drill string. When guidance is required, the offset actuator provides a guiding force in a fixed direction, which has the characteristics of low friction resistance, high efficiency, conducive to eliminating wellbore spiral, low vibration, and good wellbore cleaning effect. Halliburton Company disclosed a bias device for a static directional rotary directional drilling tool, which includes inner and outer eccentric rings, and uses two motors to drive the inner and outer eccentric rings to rotate through gear transmission, thereby controlling the drill bit to point in the desired direction. When the double eccentric rings reach the desired position, the case proposes to use vector control to drive the motor to maintain the expected drill bit direction. In addition, the case also proposes to add a braking device to the motor or a self-locking mechanism to the gear transmission mechanism to lock the position of the double eccentric rings. However, motor vector control is a method of dynamically adjusting the drill bit direction. This method is relatively complicated, and the control effect is easily affected by the disturbance of the drill bit, and the fine-tuning of the drilling direction is not good.

[0005] In the prior art, hydraulic drive is usually used to achieve adjustment and control of rotary guide equipment, but it usually requires a large number of drive components to work together to achieve adjustment. The setting of a large number of hydraulic components will lead to the complication of the structure of the rotary guide equipment, and the controllability and stability of the equipment will be poor. Summary of the invention

[0006] The present invention provides an underground rotary steering device and an adjustment method for oil production, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that the existing rotary steering equipment usually adopts a hydraulic drive method to achieve adjustment control, and a large number of drive components need to work together to achieve adjustment. The setting of a large number of hydraulic components will lead to the complication of the structure of the rotary steering equipment and the poor controllability and stability of the equipment.

[0007] One of the technical solutions of the present invention is achieved through the following measures: a downhole rotary guide device for oil production, comprising a cylindrical shell, a driving shaft with a first axial flow channel in the middle and a driven shaft with a second axial flow channel in the middle, a supporting inner ring platform is provided on the inner side of the left end of the cylindrical shell, the inner side of the supporting inner ring platform is rotatably installed with the outer side of the left part of the driving shaft, and the axis of the driving shaft coincides with the axis of the cylindrical shell.

[0008] A universal support part with an axial channel in the middle is fixedly installed on the inner side of the right part of the cylindrical shell, and a hollow sleeve is fixedly installed on the inner side of the universal support part. The axis of the sleeve coincides with the axis of the cylindrical shell. The universal support part can tilt within a certain angle range as the sleeve tilts. The left end of the driven shaft passes through the inside of the sleeve from right to left and is connected to the outer side of the right part of the driving shaft through a ball cage universal joint.

[0009] The outer side of the right end of the driving shaft and the inner side of the left end of the driven shaft are fixedly connected through a universal joint, so that the drilling fluid can flow from the first axial flow channel to the second axial flow channel.

[0010] A driving part and an inclination adjustment module are fixedly installed in a cylindrical shell corresponding to the right side position of the supporting inner ring platform; the inclination adjustment module includes a linear actuator, an I-shaped bracket and a guide plate, a guide plate which can be sleeved on the outer side of the left part of the driven shaft is fixedly installed on the left end of the sleeve, an I-shaped bracket sleeved on the outer side of the middle part of the driving shaft is fixedly installed in the cylindrical shell corresponding to the right side position of the driving part, at least three linear actuators whose protruding ends can extend to the right are evenly distributed and fixedly installed on the I-shaped bracket along the circumference, and the right ends of the protruding ends of each linear actuator are respectively abutted against the corresponding positions on the left side of the guide plate.

[0011] The driving part can respectively control the extension length of the extension end of each linear actuator, so that the guide plate can be bent according to a predetermined angle and direction, and then the guide plate can drive the driven shaft to bend according to a predetermined angle and direction through the sleeve.

[0012] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned ball cage type universal joint may include a ball head, a limit nut, a spherical shell, a steel ball, an adapter plate and a transmission sleeve. The outer side of the right part of the driving shaft is connected to the transmission with a drum-shaped ball head, and the outer side of the driving shaft corresponding to the right side position of the ball head is threadedly connected with a limit nut whose left end is against the right end of the ball head; the outer side of the ball head is sleeved with a spherical shell whose shape is matched with the shape of the ball head, and the inner side wall of the spherical shell is evenly distributed along the circumference with a plurality of outer raceways opening inward and in the shape of long strips, and each outer raceway is arranged along the meridian direction of the spherical shell, and the outer side wall of the ball head corresponding to each outer raceway position is respectively provided with a corresponding inner raceway with an opening outward and in the shape of a long strip, and each inner raceway is provided with a steel ball with the outer end located in the corresponding outer raceway; an adapter plate sleeved on the outer side of the driving shaft is fixedly installed on the right end of the spherical shell, and a transmission sleeve sleeved on the outer side of the driving shaft is fixedly installed in the middle of the right end of the adapter plate, and the inner side of the right end of the transmission sleeve is transmission-connected with the outer side of the left end of the driven shaft.

[0013] The above-mentioned driving part may include an oil tank, an oil pump and an oil distribution plate. The oil tank and the oil distribution plate that can be sleeved on the outside of the drive shaft are fixedly installed at intervals on the left and right in the cylindrical shell corresponding to the position between the supporting inner ring platform and the inclination adjustment module. An oil pump is arranged between the oil tank and the oil distribution plate. The oil inlet of the oil pump is connected to the oil tank, the oil outlet of the oil pump is connected to the oil inlet on the oil distribution plate, and the oil return port on the oil distribution plate is connected to the oil tank; each linear actuator is a hydraulic cylinder, and each oil inlet on the hydraulic cylinder is respectively connected to the corresponding oil outlet on the oil distribution plate through an oil supply pipeline, and an electromagnetic reversing valve is arranged on the oil supply pipeline; the I-shaped bracket includes a left annular support plate, a connecting sleeve and a right annular support plate, and a connecting sleeve is sleeved on the outside of the drive shaft corresponding to the right position of the oil distribution plate, and the outside of the left end of the connecting sleeve A left annular support plate and a right annular support plate are fixedly installed on the outer sides of the right end, and the outer side walls of the left annular support plate and the right annular support plate are fixedly installed together with the corresponding positions of the inner side wall of the cylindrical shell respectively; at least three first U-shaped notches opening outward and passing through left and right are evenly distributed on the left annular support plate along the circumference, and a second U-shaped notch opening outward and passing through left and right is provided on the right annular support plate at each first U-shaped notch position, and a hydraulic cylinder with the left end located in the first U-shaped notch is provided in each second U-shaped notch, and the left end of each hydraulic cylinder is fixedly installed on the corresponding position of the left end face of the left annular support plate by a first U-shaped clamping block, and the right end of each hydraulic cylinder is fixedly installed on the corresponding position of the right end face of the right annular support plate by a second U-shaped clamping block.

[0014] The above-mentioned inclination adjustment module may also include an adjusting rod, a ball and a limit end cover. The right end of the piston rod of each hydraulic cylinder is fixedly installed with an adjusting rod, and the right end of the adjusting rod is abutted against the corresponding position on the left side of the guide plate; a limit end cover with an opening facing left is fixedly installed on the outer side of the right end of the adjusting rod, and a hemispherical groove with an opening facing right is provided in the middle of the right end surface of the adjusting rod. A hemispherical hole that passes through the left and right and is larger on the left and smaller on the right is provided in the middle of the limit end cover. A ball with its left end located in the hemispherical groove is provided in the hemispherical hole, and the right end of the ball is exposed outside the limit end cover and abutted against the corresponding position on the left side of the guide plate.

[0015] The above-mentioned drive shaft may include an axially hollow main shaft and a reducer. The outer side of the left part of the main shaft is rotatably mounted with the inner side of the supporting inner ring platform through a bearing. The right end of the main shaft is fixedly mounted with the left end of the reducer. The outer diameter of the reducer gradually shrinks from the middle to the right end. The right end of the reducer is fixedly connected to the left end of the driven shaft through a universal joint.

[0016] The above-mentioned universal joint may include a sealing pressure ring, a first sealing ring, an annular clamp, a second sealing ring, a corrugated disk and an elastic sleeve. A sealing pressure ring is fixedly installed on the inner side of the left end of the driven shaft by means of a thread, and a limiting inner ring platform is provided on the inner side of the driven shaft corresponding to the right position of the sealing pressure ring. The first sealing ring, the annular clamp and the second sealing ring are installed in sequence from left to right in the driven shaft corresponding to the position between the limiting inner ring platform and the sealing pressure ring; a corrugated disk mounting inner ring groove is provided on the inner side of the annular clamp, and an elastic corrugated disk is provided in the corrugated disk mounting inner ring groove, a liquid hole is provided in the middle of the corrugated disk, and an elastic sleeve with a left end located on the left side of the driven shaft is fixedly installed in the liquid hole, and the inner side of the left part of the elastic sleeve is fixedly installed together with the outer side of the right end of the driving shaft; a left annular protrusion protruding to the left is provided on the corrugated disk close to one side of the elastic sleeve, and a right annular protrusion protruding to the right is provided on the corrugated disk close to one side of the annular clamp.

[0017] The above may also include an inclination sensor, and the inclination sensor for detecting the inclination angle of the guide plate is fixedly installed on the upper left side of the guide plate.

[0018] The above-mentioned universal support part may include a self-lubricating radial spherical bearing and a bearing pressure ring. The inner side of the right part of the cylindrical shell is fixedly installed with the outer side of the outer ring of the self-lubricating radial spherical bearing, and the inner side of the inner ring of the self-lubricating radial spherical bearing is fixedly installed with the outer side of the middle part of the sleeve; a stopping inner ring platform is provided on the inner side of the cylindrical shell corresponding to the left end of the self-lubricating radial spherical bearing, and the right end of the stopping inner ring platform is abutted against the left end of the self-lubricating radial spherical bearing; a bearing pressure ring is fixedly installed on the inner side of the right end of the cylindrical shell, and the left end is abutted against the right end of the self-lubricating radial spherical bearing, the inner diameter of the bearing pressure ring is larger than the outer diameter of the sleeve, and a conical groove with a smaller left end and a larger right end is provided on the inner side of the right part of the bearing pressure ring.

[0019] Rolling bearings may be provided between the inner side of the driving part and the outer side of the driving shaft, between the inner sides of the left and right ends of the I-shaped bracket and the corresponding positions of the outer side of the driving shaft, and between the inner side of the sleeve and the outer side of the driven shaft.

[0020] The above-mentioned cylindrical shell may include a left cylindrical shell and a right cylindrical shell. The outer side of the right end of the left cylindrical shell and the inner side of the left end of the right cylindrical shell are installed together through threads. The right end of the left cylindrical shell is evenly distributed along the circumference with a number of threaded holes opening outward. A limiting hole is provided on the right cylindrical shell corresponding to the position of each threaded hole, and each limiting hole is provided with a fixing screw with an inner end located in the threaded hole.

[0021] The second technical solution of the present invention is achieved by the following measures: A method for adjusting a downhole rotary guide device for oil production, comprising: The target tilt angle and target tilt direction to which the guide plate needs to be adjusted are obtained, and the target coordinates Zi of the z-axis of each contact point are calculated respectively by the target tilt angle and the target tilt direction, where i is the number of each linear actuator.

[0022] Detect the extension and retraction amount of the extended end of each linear actuator, calculate the actual tilt angle and actual tilt direction of the guide plate in the current state, and determine the actual coordinate Zi' of the z-axis of each contact point in the current state, where i is the number of each linear actuator.

[0023] The extension and retraction amount of the extended end of each linear actuator is calculated respectively, that is, the difference ΔZi between the actual coordinates of each contact point and the target coordinates, where the positive and negative values ​​indicate the direction, a positive value indicates the extension direction, and a negative value indicates the retraction direction.

[0024] The extended ends of the linear actuators are controlled to be extended and retracted accordingly according to the extension amounts of the extended ends of the linear actuators, so that the inclination angle and the inclination direction of the guide plate are adjusted to the target inclination angle and the target inclination direction.

[0025] The present invention has a reasonable and compact structure and is easy to use. It can control the guide plate to tilt at any angle within the adjustment range only by adjusting the telescopic length of the piston rod of each hydraulic cylinder, and the inclined guide plate can be driven by the sleeve to bend and adjust the driven shaft at a predetermined angle and direction to achieve the guiding function, which greatly simplifies the mechanical structure of the rotary guide device, reduces the number of parts, reduces costs, improves reliability and stability, and simplifies the control parameters and control procedures of the rotary guide device, thereby effectively improving the response speed and control accuracy of the adjustment control. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 It is a schematic diagram of the main view and partial cross-section structure of embodiments 1-10 of the present invention.

[0027] Attached Figure 2 For attachment Figure 1 Schematic diagram of the enlarged radial cross-section structure of the mid-ball cage universal joint.

[0028] Attached Figure 3 For attachment Figure 1 Schematic diagram of the exploded structure of the mid-tilt adjustment module.

[0029] Attached Figure 4 For attachment Figure 1 Schematic diagram of the exploded structure of the universal joint and the driven shaft.

[0030] Attached Figure 5 For attachment Figure 1 Schematic diagram of the three-dimensional structure of the middle annular clamp, corrugated disk and elastic sleeve.

[0031] Attached Figure 6 For attachment Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0032] Attached Figure 7 For attachment Figure 1 Schematic diagram of the enlarged structure at point B in the middle.

[0033] Attached Figure 8 For attachment Figure 1 Schematic diagram of the enlarged axial cross-sectional structure of the middle adjustment rod, ball and limit end cover.

[0034] Attached Fig. 9 It is a schematic diagram of an enlarged axial cross-sectional structure of the universal support part in Example 1 of the present invention.

[0035] Attached Fig.10 This is a flow chart of Example 11 of the present invention.

[0036] The codes in the accompanying drawings are: 1 is the first axial flow channel, 2 is the second axial flow channel, 3 is the driven shaft, 4 is the support inner ring platform, 5 is the sleeve, 6 is the guide plate, 7 is the ball head, 8 is the limit nut, 9 is the spherical shell, 10 is the steel ball, 11 is the adapter plate, 12 is the transmission sleeve, 13 is the outer raceway, 14 is the inner raceway, 15 is the oil tank, 16 is the oil pump, 17 is the oil distribution plate, 18 is the hydraulic cylinder, 19 is the oil supply pipeline, 20 is the electromagnetic reversing valve, 21 is the left annular support plate, 22 is the connecting sleeve, 23 is the right annular support plate, 24 is the first U-shaped notch, 25 is the second U-shaped notch, 26 is the first U-shaped block, 27 is the second U-shaped block, 28 is Adjusting rod, 29 is a ball, 30 is a main shaft, 31 is a reducer, 32 is a bearing, 33 is a sealing pressure ring, 34 is a first sealing ring, 35 is an annular clip, 36 is a second sealing ring, 37 is a corrugated disk, 38 is an elastic sleeve, 39 is a limiting inner ring platform, 40 is a left annular protrusion, 41 is a right annular protrusion, 42 is an inclination sensor, 43 is a self-lubricating radial spherical bearing, 44 is a bearing pressure ring, 45 is a stop inner ring platform, 46 is a tapered groove, 47 is a rolling bearing, 48 is a left cylindrical shell, 49 is a right cylindrical shell, 50 is a drill bit, 51 is a fixing ring, 52 is a spherical rotating body, 53 is a limiting end cover, 54 is a driving surface, and 55 is a piston rod. DETAILED DESCRIPTION

[0037] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0038] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0039] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As attached Figure 1-9 As shown, the downhole rotary guide device for oil production includes a cylindrical shell, a driving shaft with a first axial flow channel 1 in the middle and a driven shaft 3 with a second axial flow channel 2 in the middle, a supporting inner ring platform 4 is provided on the inner side of the left end of the cylindrical shell, and the inner side of the supporting inner ring platform 4 is rotatably installed with the outer side of the left part of the driving shaft, and the axis of the driving shaft coincides with the axis of the cylindrical shell.

[0040] In the above technical solution, the driving shaft and the cylindrical shell are coaxially arranged; in order to increase the wear resistance of the supporting inner ring platform 4, a wear-resistant coating can be provided on the inner side of the supporting inner ring platform 4; a self-lubricating bearing or bushing can also be provided between the supporting inner ring platform 4 and the driving shaft to reduce the wear of the supporting inner ring platform 4 and make the rotation between the two smoother.

[0041] During use, the driving shaft is connected to the power output shaft of the downhole drilling tool driving device, the driven shaft 3 is connected to the drill bit 50, and the cylindrical shell is connected to the cylindrical shell of the drill string.

[0042] A universal support part with an axial channel in the middle is fixedly installed on the inner side of the right part of the cylindrical shell, and a hollow sleeve 5 is fixedly installed on the inner side of the universal support part. The axis of the sleeve 5 coincides with the axis of the cylindrical shell. The universal support part can tilt within a certain angle range as the sleeve 5 tilts. The left end of the driven shaft 3 passes through the inside of the sleeve 5 from right to left and is connected to the outer side of the right part of the driving shaft through a ball cage universal joint.

[0043] In the above technical solution, the sleeve 5 and the cylindrical shell are coaxially arranged, so that the driven shaft 3 and the cylindrical shell can also be coaxially arranged, so that the coaxiality of the driving shaft and the driven shaft 3 is higher and the transmission effect is better; in order to reduce friction and wear, a self-lubricating bearing or sleeve can be provided between the driven shaft 3 and the sleeve 5.

[0044] The ball cage universal joint is a prior art, also known as a ball cage universal coupling, which is connected to the driving shaft and the driven shaft 3 through the ball cage outer ring and the star-shaped inner ring respectively. The middle part of the force transmission steel ball is installed in the window of the cage, and the cage is installed between the ball cage outer ring and the star-shaped inner ring. The force transmission steel ball can roll in the raceway composed of spherical grooves between the ball cage outer ring and the star-shaped inner ring. Therefore, when the sleeve 5 drives the driven shaft 3 to bend, even if the driving shaft and the driven shaft 3 are not coaxial and there is a certain angle between the axes of the two, the rotation speeds of the driving shaft and the driven shaft 3 can be kept synchronized, and the driving force can be transmitted from the driving shaft to the driven shaft 3 through the ball cage universal joint, so that the driven shaft 3 drives the drill bit 50 to rotate and drill according to a predetermined trajectory.

[0045] According to the needs, such as Figure 8 As shown, the universal support part may include a fixing ring 51 and a spherical rotating body 52 with an axial through hole. The outer side of the fixing ring 51 is fixedly installed with the inner side of the right part of the cylindrical shell. The inner side of the fixing ring 51 is provided with a spherical inner ring groove adapted to the outer shape of the spherical rotating body 52. ​​The spherical rotating body 52 is rotatably installed in the spherical inner ring groove. The inner side of the spherical rotating body 52 is fixedly installed with the outer side of the middle part of the sleeve. In addition, to facilitate the installation of the spherical rotating body 52, the fixing ring 51 may be two half rings symmetrical up and down. During use, when the sleeve 5 is tilted, the spherical rotating body 52 can rotate accordingly at a certain angle, always providing reliable support and constraint for the sleeve and the driven shaft 3, thereby reducing the vibration of the driven shaft 3 and avoiding the breakage of the driven shaft 3.

[0046] The outer side of the right end of the driving shaft and the inner side of the left end of the driven shaft 3 are fixedly connected through a universal joint, so that the drilling fluid can flow from the first axial flow channel 1 to the second axial flow channel 2.

[0047] During use, the drilling fluid can pass through the first axial flow channel 1 in the driving shaft, flow to the second axial flow channel 2 in the driven shaft 3 through the universal joint, and finally the drilling fluid can be supplied to the drill bit 50 .

[0048] According to requirements, the universal adapter can be a metal or non-metal bellows in the prior art, or an elastic material hose, such as a corrosion-resistant rubber tube, so that when the driven shaft 3 is tilted in any direction, the universal adapter can expand and contract and deform in the corresponding direction without being damaged, so that the drilling fluid can always flow smoothly from the first axial flow channel 1 to the second axial flow channel 2.

[0049] A driving part and an inclination adjustment module are fixedly installed in the cylindrical shell corresponding to the right side position of the supporting inner ring platform 4; the inclination adjustment module includes a linear actuator, an I-shaped bracket and a guide plate 6, and a guide plate 6 that can be sleeved on the left outer side of the driven shaft 3 is fixedly installed on the left end of the sleeve 5, and an I-shaped bracket sleeved on the outside of the middle part of the driving shaft is fixedly installed in the cylindrical shell corresponding to the right side position of the driving part, and at least three linear actuators whose protruding ends can extend to the right are evenly distributed and fixedly installed on the I-shaped bracket along the circumference, and the right ends of the protruding ends of each linear actuator are respectively abutted against the corresponding positions on the left side of the guide plate 6.

[0050] In the above technical solution, the linear actuator can be a gear rack transmission mechanism in the prior art, in which case the driving part can be realized by a rotary motor in the prior art, which drives the gear to rotate, so that the rack can be telescopically moved left and right along a predetermined track; the linear actuator can also be an electric push rod in the prior art, in which case the driving part is a motor integrated with the electric push rod; the linear actuator can also be a hydraulic cylinder, in which case the driving part can be a hydraulic control system with a hydraulic pump. The I-shaped bracket can be an installation bracket with an I-shaped axial section and a hollow interior, which can be integrally formed by welding or machining.

[0051] The driving unit can control the extension length of each linear actuator extension end respectively, so that the guide plate 6 can bend at a predetermined angle and direction, and then the guide plate 6 can drive the driven shaft 3 to bend at a predetermined angle and direction through the sleeve 5.

[0052] During use, since the right end of the extended end of each linear actuator is respectively abutted against the corresponding position on the left side of the guide disk 6, and the inclination of the driven shaft 3 is driven by the sleeve 5, and the left end of the sleeve 5 is fixed to the middle of the right side of the guide disk 6, the inclination angle of the guide disk 6 can be controlled by controlling the extended length of the extended end of each linear actuator respectively, so that the inclined guide disk 6 can drive the driven shaft 3 to bend to a corresponding predetermined angle through the sleeve 5, so that the drill bit 50 can drill according to the set trajectory, wherein the bending of the driven shaft 3 means that after the driven shaft 3 is tilted, there is a certain angle between the axis of the driven shaft 3 and the axis of the driving shaft.

[0053] In this embodiment, the preferred number of linear actuators is three, which is mainly based on the principle of three-point coplanarity, that is, a plane can be determined by any three points that are not on the same straight line. Therefore, by controlling the extension lengths of the extension ends of the three linear actuators, the guide plate 6 can be pushed to tilt at a predetermined angle, and the guide plate 6 drives the driven shaft 3 to tilt at a predetermined angle through the sleeve 5 to achieve angle adjustment and rotation guidance. Reducing the number of linear actuators can reduce the number of parts, simplify the structure of the device, reduce costs, and reduce the difficulty of coordinated control of each linear actuator, thereby improving control accuracy.

[0054] In addition, the three linear actuators are evenly distributed along the circumference, so that the protruding ends of the three linear actuators differ by 120°. This can not only balance the force on the guide plate 6, but also stagger the linear actuators at the maximum center angle, so that the guide plate 6 can be driven to make a larger angle of tilt adjustment through a smaller telescopic amount, effectively reducing the difficulty of adjustment, thereby increasing the rotatable adjustment range of the present invention and making full use of the stroke of each linear actuator.

[0055] The present invention has a reasonable and compact structure and is easy to use. The inclination angle of the guide plate 6 can be controlled through the coordinated action of three linear actuators, and the inclined guide plate 6 can drive the driven shaft 3 to bend to a predetermined angle through the sleeve 5 to realize the guiding function, which greatly reduces the number of parts and components, simplifies the structure of the device, effectively reduces the cost, and reduces the difficulty of coordinated control of each linear actuator, thereby improving the control accuracy of the inclination adjustment module.

[0056] According to actual needs, the above-mentioned oil production downhole rotary guide device can be further optimized and / or improved: Embodiment 2: As attached Figure 1 , 2 As shown in , 6, the ball cage type universal joint includes a ball head 7, a limit nut 8, a spherical shell 9, a steel ball 10, an adapter plate 11 and a transmission sleeve 12. The outer side of the right part of the driving shaft is transmission-connected with a drum-shaped ball head 7, and the outer side of the driving shaft corresponding to the right side of the ball head 7 is threadedly connected with a limit nut 8 whose left end abuts against the right end of the ball head 7.

[0057] In the above technical solution, the ball head 7 and the drive shaft can be connected by a transmission structure with a drum-shaped, square or hexagonal cross section in the prior art, or by a flat key or a spline. In this embodiment, a driving surface 54 is provided on the outer side of the right part of the drive shaft, and the driving surface 54 is parallel to the axis of the drive shaft. A thrust surface matching the driving surface 54 is provided on the inner side of the ball head 7. When the ball head 7 is mounted on the outer side of the right part of the drive shaft, the thrust surface and the driving surface 54 fit perfectly together, thereby realizing the transmission connection between the ball head 7 and the drive shaft; the left end of the ball head 7 can be limited by a shaft shoulder or a shaft ring provided on the drive shaft, and the limit nut 8 can effectively prevent the ball head 7 from loosening and falling off.

[0058] The outer side of the ball head 7 is provided with a spherical shell 9 whose outer shape matches that of the ball head 7. A plurality of outer raceways 13 with openings facing inward and in the shape of long strips are evenly distributed on the inner side wall of the spherical shell 9 along the circumference, and each outer raceway 13 is arranged along the meridian direction of the spherical shell 9. An inner raceway 14 with openings facing outward and in the shape of long strips is arranged on the outer side wall of the ball head 7 corresponding to each position of the outer raceway 13, and a steel ball 10 with the outer end located in the corresponding outer raceway 13 is arranged in each inner raceway 14. An adapter plate 11 sleeved on the outer side of the drive shaft is fixedly installed at the right end of the spherical shell 9, and a transmission sleeve 12 sleeved on the outer side of the drive shaft is fixedly installed in the middle of the right end of the adapter plate 11, and the inner side of the right end of the transmission sleeve 12 is transmission-connected to the outer side of the left end of the driven shaft 3.

[0059] In the above technical solution, after the steel ball 10 is embedded between the inner raceway 14 and the outer raceway 13, it can roll along the meridian direction of the ball head 7, so that the spherical shell 9 can rotate arbitrarily around the center of the ball head 7 within the adjustment range. A set angle can be bent between the driving shaft and the driven shaft 3, but the driving force can still be transmitted to the spherical shell 9 through the ball head 7 via the steel ball 10, and finally transmitted to the driven shaft 3 through the spherical shell 9, the adapter plate 11 and the transmission sleeve 12, so that when the driven shaft 3 is tilted, the rotation speed between the driving shaft and the driven shaft 3 can also be kept synchronized, and the torque between the driving shaft and the driven shaft 3 can be transmitted.

[0060] According to the requirements, the transmission connection between the transmission sleeve 12 and the driven shaft 3 can be achieved through a transmission structure with a drum-shaped, square or hexagonal cross-section in the prior art, or through a flat key or a spline. In this embodiment, a thrust surface is provided on the outer side of the left end of the driven shaft 3, and the thrust surface is parallel to the axis of the driven shaft 3. A driving surface matched with the thrust surface is provided on the inner side of the right part of the transmission sleeve 12. When the transmission sleeve 12 is sleeved on the outer side of the left end of the driven shaft 3, the thrust surface and the driving surface are completely fitted, so that the transmission connection between the transmission sleeve 12 and the driven shaft 3 is more reliable and stable.

[0061] Embodiment 3: As attached Figure 1 , 3 As shown, the driving part includes an oil tank 15, an oil pump 16 and an oil distribution plate 17. The oil tank 15 and the oil distribution plate 17 that can be sleeved on the outside of the drive shaft are fixedly installed at intervals on the left and right in the cylindrical shell corresponding to the position between the supporting inner ring platform 4 and the inclination adjustment module. An oil pump 16 is arranged between the oil tank 15 and the oil distribution plate 17. The oil inlet of the oil pump 16 is connected to the oil tank 15, the oil outlet of the oil pump 16 is connected to the oil inlet on the oil distribution plate 17, and the oil return port on the oil distribution plate 17 is connected to the oil tank 15; each linear actuator is a hydraulic cylinder 18, and each oil inlet on each hydraulic cylinder 18 is respectively connected to the corresponding oil outlet on the oil distribution plate 17 through an oil supply pipeline 19, and an electromagnetic reversing valve 20 is arranged on the oil supply pipeline 19.

[0062] In the above technical solution, the oil pump 16 can provide power for each hydraulic cylinder 18, and the electromagnetic reversing valve 20 can quickly control the action of each hydraulic cylinder 18. In this embodiment, the hydraulic cylinder 18 can be a double-acting hydraulic cylinder in the prior art, so that each hydraulic cylinder 18 can act more quickly according to the control requirements. The oil circuit and oil port on the oil distribution plate 17 can be designed according to actual needs.

[0063] Through the coordination of the oil distribution plate 17 and the multiple electromagnetic reversing valves 20, it is possible to realize the simultaneous and different oil supply operations for multiple hydraulic cylinders 18 through one oil pump 16, meet the diversified adjustment requirements, reduce the number of oil pumps 16, simplify the equipment structure, and meet the requirements of the narrow installation space of the equipment. The electromagnetic reversing valve 20 can be adjusted more conveniently, and the control response speed of the oil is faster, which is conducive to improving the control accuracy of the oil delivery amount, and then improve the adjustment accuracy of the inclination angle of the guide plate 6.

[0064] The I-shaped bracket includes a left annular support plate 21, a connecting sleeve 22 and a right annular support plate 23. The connecting sleeve 22 is mounted on the outer side of the drive shaft corresponding to the right side of the oil distribution plate 17. The left annular support plate 21 and the right annular support plate 23 are fixedly mounted on the outer side of the left end and the outer side of the right end of the connecting sleeve 22, respectively. The outer side walls of the left annular support plate 21 and the right annular support plate 23 are fixedly mounted on the corresponding positions of the inner side wall of the cylindrical shell respectively; the left annular support plate 21 is evenly distributed along the circumference with at least three openings that are open outward and pass through the left and right sides. A U-shaped notch 24 is provided on the right annular support plate 23 at the position of each first U-shaped notch 24, and a second U-shaped notch 25 with an opening facing outward and passing through the left and right sides is provided in each second U-shaped notch 25. A hydraulic cylinder 18 with a left end located in the first U-shaped notch 24 is provided in each second U-shaped notch 25. The left end of each hydraulic cylinder 18 is fixedly installed at a corresponding position on the left end surface of the left annular support plate 21 through a first U-shaped block 26, and the right end of each hydraulic cylinder 18 is fixedly installed at a corresponding position on the right end surface of the right annular support plate 23 through a second U-shaped block 27.

[0065] In the above technical solution, the first U-shaped block 26 and the second U-shaped block 27 are both provided with a U-shaped notch that passes through from left to right. The side of each hydraulic cylinder 18 close to the connecting sleeve 22 can be supported and restricted by the first U-shaped notch 24 and the second U-shaped notch 25, while the side away from the connecting sleeve 22 can be clamped by the U-shaped notches on the first U-shaped block 26 and the second U-shaped block 27. The first U-shaped block 26 and the second U-shaped block 27 can be respectively connected to the corresponding positions of the left annular support plate 21 and the right annular support plate 23 by threaded fasteners or welding, so as to completely fix each hydraulic cylinder 18 on the I-shaped bracket.

[0066] According to the requirements, the left annular support plate 21 and the right annular support plate 23 can be integrally formed with the connecting sleeve 22 by machining, casting and other methods in the prior art, or can be fixed together by welding; to prevent the connecting sleeve 22 from affecting the rotation of the drive shaft, a gap can be reserved between the oil tank 15, the oil distribution plate 17, and the I-shaped bracket and the drive shaft, or a self-lubricating bearing or sleeve can be installed accordingly; to reduce the friction between the piston rod 55 and the guide plate 6, a ball head spring plunger can be fixedly installed in the middle of the right end of the piston rod 55 of each hydraulic cylinder 18, and the ball head spring plunger is a prior art. To facilitate the installation and limitation of the oil tank 15, the oil distribution plate 17 and the I-shaped bracket, three limiting inner ring grooves with increasing inner diameters can be provided from left to right in the cylindrical shell, and the oil tank 15, the oil distribution plate 17 and the I-shaped bracket are respectively fixedly installed in the corresponding limiting inner ring grooves, and the fixed installation can be achieved by threaded connection or interference connection in the prior art.

[0067] Embodiment 4: As attached Figure 1 , 8 As shown, the inclination adjustment module also includes an adjusting rod 28, a ball 29 and a limiting end cover 53. The right end of the piston rod 55 of each hydraulic cylinder 18 is fixedly installed with an adjusting rod 28, and the right end of the adjusting rod 28 is abutted against the corresponding position on the left side of the guide plate 6; a limiting end cover 53 with an opening facing left is fixedly installed on the outer side of the right end of the adjusting rod 28, a hemispherical groove with an opening facing right is provided in the middle of the right end surface of the adjusting rod 28, a hemispherical hole that passes through the left and right and is larger on the left and smaller on the right is provided in the middle of the limiting end cover 53, a ball 29 with the left end located in the hemispherical groove is provided in the hemispherical hole, the right end of the ball 29 is exposed outside the limiting end cover 53 and abuts against the corresponding position on the left side of the guide plate 6.

[0068] Through such an arrangement, the adjusting rod 28 can avoid the need to customize the hydraulic cylinder due to extending the piston rod, so that the same function can be achieved through a conventional standard hydraulic cylinder; an adapter plate 11 can also be set between the adjusting rod 28 and the right end of the piston rod 55 of each hydraulic cylinder 18, so as to change the position of the contact point between the adjusting rod 28 and the guide plate 6, such as moving outward or inward, but it is still necessary to ensure that the axis of each adjusting rod 28 is parallel to the axis of the drive shaft.

[0069] The ball 29 converts the sliding friction between the adjustment rod 28 and the guide plate 6 into rolling friction, which greatly reduces the friction force, greatly reduces the wear, and prolongs the service life. At the same time, it can also reduce the resistance of the guide plate 6 to the right end of the piston rod 55, so that the tilting speed of the guide plate 6 is faster. In addition, the wear of the ball 29 and the guide plate 6 is reduced, and the influence of excessive wear on the tilting control accuracy of the guide plate 6 can also be reduced, thereby ensuring the adjustment accuracy of the bending angle of the driven shaft 3.

[0070] Embodiment 5: As attached Figure 1 , 6As shown in Figures 7 and 8, the drive shaft includes an axially hollow main shaft 30 and a reducer 31. The outer side of the left part of the main shaft 30 is rotatably mounted with the inner side of the supporting inner ring platform 4 through a bearing 32. The right end of the main shaft 30 is fixedly mounted with the left end of the reducer 31. The outer diameter of the reducer 31 gradually shrinks from the middle to the right end. The right end of the reducer 31 is fixedly connected with the left end of the driven shaft 3 through a universal joint.

[0071] In the above technical solution, the bearing 32 can make the support between the cylindrical housing and the drive shaft more stable, and can also make the drive shaft rotate more smoothly, reduce the rotation resistance, and make the movement state between the cylindrical housing and the drive shaft more independent. A shoulder can be formed between the left end of the reducer 31 and the main shaft 30, which is more convenient for the installation and positioning of the ball head 7, and at the same time, the drilling fluid can be better transported to the second flow channel, and the flow rate of the drilling fluid can be increased, so that the drilling fluid can be better sprayed out of the drill bit.

[0072] Embodiment 6: As attached Figure 1 , 4 As shown in FIGS. 5 and 7, the universal joint comprises a sealing ring 33, a first sealing ring 34, an annular clamp 35, a second sealing ring 36, a corrugated disc 37 and an elastic sleeve 38. The sealing ring 33 is fixedly installed on the inner side of the left end of the driven shaft 3 by threads, and a limiting inner ring platform 39 is provided on the inner side of the driven shaft 3 corresponding to the right position of the sealing ring 33. The first sealing ring 34, annular clamp 35 and a second sealing ring 36 are installed in sequence from left to right in the driven shaft 3 corresponding to the position between the limiting inner ring platform 39 and the sealing ring 33; the annular clamp 35 An inner ring groove is provided on the inner side for mounting the corrugated disk 37, and an elastic corrugated disk 37 is provided in the inner ring groove for mounting the corrugated disk 37. A liquid through hole is provided in the middle of the corrugated disk 37 which passes through left and right sides, and an elastic sleeve 38 is fixedly installed in the liquid through hole, and the left end of the elastic sleeve 38 is located on the left side of the driven shaft 3. The inner side of the left part of the elastic sleeve 38 is fixedly installed with the outer side of the right end of the driving shaft; a left annular protrusion 40 protruding to the left is provided on the corrugated disk 37 close to the elastic sleeve 38, and a right annular protrusion 41 protruding to the right is provided on the corrugated disk 37 close to the annular clamp 35.

[0073] In the above technical solution, the elastic sleeve 38 and the corrugated disk 37 can be integrally formed, and both can be made of rubber material; the left annular protrusion 40 and the right annular protrusion 41 can form a group of crests and troughs, and the crests and troughs can reserve sufficient expansion space for the deformation of the corrugated disk 37. In this embodiment, only one group is set, and multiple groups can also be set during the specific implementation process.

[0074] The annular clamp 35 can be made of metal or hard plastic. The inner ring groove of the corrugated disk 37 can just clamp the outer edge of the corrugated disk 37 and reserve expansion space for the deformation of the corrugated disk 37. The annular clamp 35 can enhance the structural strength and rigidity of the edge area of ​​the corrugated disk 37 to avoid deformation during the rotation adjustment of the driven shaft 3.

[0075] In addition, in this embodiment, the inner side of the left portion of the elastic sleeve 38 can be fixedly installed together with the outer side of the right end of the reducer 31, and the inner diameter of the elastic sleeve 38 is smaller than the outer diameter of the right end of the reducer 31. After deformation, the elastic sleeve 38 can be better fitted on the outer side of the right end of the reducer 31, effectively preventing the two from detaching.

[0076] By such arrangement, when the driven shaft 3 tilts in any direction, the elastic deformation and expansion of the corrugated disk 37 can keep the flow channel between the driving shaft and the driven shaft 3 always connected, ensuring the normal flow of the drilling fluid. At the same time, it can effectively avoid the use of a large number of connecting bolts between the driving shaft and the driven shaft 3, greatly simplifying the structure of the universal joint and improving the sealing performance.

[0077] Embodiment 7: As attached Figure 1 As shown, the guide plate 6 also includes an inclination sensor 42 , which is fixedly mounted on the upper left side of the guide plate 6 and is used to detect the inclination angle of the guide plate 6 .

[0078] By such arrangement, the inclination sensor 42 can effectively monitor the inclination angle of the guide plate 6 , thereby providing basic data for the angle adjustment of the driven shaft 3 .

[0079] Embodiment 8: As attached Figure 1 As shown, the universal support part includes a self-lubricating radial spherical bearing 43 and a bearing pressure ring 44. The inner side of the right part of the cylindrical shell is fixedly installed with the outer side of the outer ring of the self-lubricating radial spherical bearing 43, and the inner side of the inner ring of the self-lubricating radial spherical bearing 43 is fixedly installed with the outer side of the middle part of the sleeve 5; a stopping inner ring platform 45 is provided on the inner side of the cylindrical shell corresponding to the left end of the self-lubricating radial spherical bearing 43, and the right end of the stopping inner ring platform 45 is abutted against the left end of the self-lubricating radial spherical bearing 43; a bearing pressure ring 44 is fixedly installed on the inner side of the right end of the cylindrical shell, and the left end is abutted against the right end of the self-lubricating radial spherical bearing 43, the inner diameter of the bearing pressure ring 44 is larger than the outer diameter of the sleeve 5, and a conical groove 46 with a smaller left end and a larger right end is provided on the inner side of the right part of the bearing pressure ring 44.

[0080] When in use, the self-lubricating radial spherical bearing 43 is an existing technology, which can be purchased directly, greatly reducing the design cost and processing cost, and has good interchangeability, which makes it easier to maintain the universal support part.

[0081] Embodiment 9: As attached Figure 1 As shown, rolling bearings 47 are provided between the inner side of the driving part and the outer side of the driving shaft, between the inner sides of the left and right ends of the I-shaped bracket and the corresponding positions of the outer side of the driving shaft, and between the inner side of the sleeve 5 and the outer side of the driven shaft 3.

[0082] By such an arrangement, the support points for the driving shaft can be increased, the vibration of the driving shaft can be reduced, and the rotation of the driving shaft and the driven shaft 3 can be made more stable, while the movement state of the driving part, the I-shaped bracket and the sleeve 5 will not be affected.

[0083] Embodiment 10: As attached Figure 1 As shown, the cylindrical shell includes a left cylindrical shell 48 and a right cylindrical shell 49. The outer side of the right end of the left cylindrical shell 48 and the inner side of the left end of the right cylindrical shell 49 are installed together through threads. The right end of the left cylindrical shell 48 is evenly distributed along the circumference with a number of threaded holes opening outward. Corresponding to the position of each threaded hole, the right cylindrical shell 49 is provided with a limiting hole, and each limiting hole is provided with a fixing screw with the inner end located in the threaded hole.

[0084] This arrangement makes it easier to install and maintain the various components in the cylindrical shell.

[0085] Example 11: Fig.10 As shown, a method for adjusting a downhole rotary guide device for oil production comprises: S1, obtaining the target tilt angle and target tilt direction to which the guide plate 6 needs to be adjusted, and calculating the target coordinates Z of each contact point on the z-axis respectively according to the target tilt angle and target tilt direction. i , where i is the number of each linear actuator.

[0086] S2, detect the extension amount of the extended end of each linear actuator, and calculate the actual tilt angle and actual tilt direction of the guide plate 6 in the current state, and determine the actual coordinate Z of each contact point on the z-axis in the current state i ', where i is the number of each linear actuator.

[0087] S3, calculate the extension and retraction of each linear actuator extension end, that is, the difference ΔZ between the actual coordinates of each contact point and the target coordinates i , where the positive or negative value indicates the direction, a positive value indicates the extending direction, and a negative value indicates the retracting direction.

[0088] S4, controlling the extension of each linear actuator's extension end to extend and retract accordingly according to the extension amount of the extension end of each linear actuator, so that the inclination angle and inclination direction of the guide plate 6 are adjusted to the target inclination angle and target inclination direction.

[0089] In the above technical solution, if Figure 1 As shown, the coordinate system of the present invention is the drilling tool coordinate system oxyz, wherein the z-axis coincides with the axis of the driving shaft and points to the drilling direction.

[0090] Based on common knowledge, it can be known that three points can determine a surface. In the present invention, the right end of the extended end of each linear actuator is always against the corresponding position of the left end surface of the guide disk 6. Therefore, the right end surface of the extended end of each linear actuator is the contact point. The three contact points can form a contact surface, and the contact surface coincides with the left end surface of the guide disk 6. Therefore, the inclination angle and inclination direction of the left end surface of the guide disk 6 can be located through the contact points.

[0091] In the present invention, after the linear actuator is fixedly installed in the cylindrical housing, its position is fixed relative to the cylindrical housing, and it cannot move in the up-down and front-back directions. Only the extended end of each linear actuator can be extended and retracted left and right. That is to say, the coordinates of the right end of the extended end of each linear actuator (each contact point) in the x-axis direction and the y-axis direction will always remain unchanged, and only the coordinates in the z-axis direction will change with the extension and retraction of the extended end of each linear actuator. Therefore, in the present invention, the x-axis and y-axis coordinates do not need to be detected, and only the z-axis coordinates need to be detected, that is, the extended length or retracted length of the extended end of each linear actuator can be detected to obtain the three-dimensional coordinates (X, Y, Z) of each contact point, where the X and Y values ​​remain unchanged and only the Z value changes.

[0092] The position of the guide plate 6 can be quickly determined by the three-dimensional coordinates of each contact point, and then the inclination angle and inclination direction of the guide plate 6 can be determined. During use, the middle part of the right end of the guide plate 6 is fixedly installed with the left end of the sleeve 5, and the driven shaft 3 is sleeved in the sleeve 5, so the bending angle and bending direction of the driven shaft 3 can be obtained by the inclination angle and inclination direction of the guide plate 6.

[0093] In the above technical solution, the inclination angle of the guide plate 6 can be determined by the inclination sensor 42, and can also be reversed based on the measurement data of the while drilling measurement tool.

[0094] Compared with the prior art, the present invention can control the guide plate 6 to tilt at any angle within the adjustment range by adjusting the telescopic length of the extended end of each linear actuator, and the tilted guide plate 6 can drive the driven shaft 3 to bend and adjust at a predetermined angle and direction through the sleeve 5, which greatly simplifies the mechanical structure of the rotary guide device, improves reliability and stability, and simplifies the control parameters and control procedures of the rotary guide device, thereby effectively improving the response speed of the adjustment control.

[0095] The above technical features respectively constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A downhole rotary guide device for oil production, characterized in that: It comprises a cylindrical shell, a driving shaft having a first axial flow channel in the middle, and a driven shaft having a second axial flow channel in the middle. A supporting inner ring platform is provided on the inner side of the left end of the cylindrical shell. The inner side of the supporting inner ring platform is rotatably mounted with the outer side of the left part of the driving shaft. The axis of the driving shaft coincides with the axis of the cylindrical shell. A universal support part with an axial channel in the middle is fixedly installed on the inner side of the right part of the cylindrical shell, and a hollow sleeve is fixedly installed on the inner side of the universal support part. The axis of the sleeve coincides with the axis of the cylindrical shell. The universal support part can tilt within a certain angle range as the sleeve tilts. The left end of the driven shaft passes through the inner side of the sleeve from right to left and is connected to the outer side of the right part of the driving shaft through a ball cage universal joint. The outer side of the right end of the driving shaft and the inner side of the left end of the driven shaft are fixedly connected through a universal joint, so that the drilling fluid can flow from the first axial flow channel to the second axial flow channel; A driving part and an inclination adjustment module are fixedly installed in a cylindrical shell corresponding to the right side position of the supporting inner ring platform; the inclination adjustment module includes a linear actuator, an I-shaped bracket and a guide plate, a guide plate that can be sleeved on the left side of the driven shaft is fixedly installed on the left end of the sleeve, an I-shaped bracket sleeved on the outside of the middle part of the driving shaft is fixedly installed in the cylindrical shell corresponding to the right side position of the driving part, at least three linear actuators whose protruding ends can protrude to the right are evenly fixedly installed on the I-shaped bracket along the circumference, and the right ends of the protruding ends of each linear actuator are respectively against the corresponding positions on the left side of the guide plate; The driving part can respectively control the extension length of the extension end of each linear actuator, so that the guide plate can be bent according to a predetermined angle and direction, and then the guide plate can drive the driven shaft to bend according to a predetermined angle and direction through the sleeve.

2. The downhole rotary guide device for oil production according to claim 1, characterized in that: The ball cage type universal joint includes a ball head, a limit nut, a spherical shell, a steel ball, an adapter plate and a transmission sleeve. The outer side of the right part of the driving shaft is connected to the drum-shaped ball head, and the outer side of the driving shaft corresponding to the right side of the ball head is connected to the limit nut with the left end abutting against the right end of the ball head through a thread. A spherical shell whose shape matches that of the ball head is mounted on the outside of the ball head, and a plurality of outer raceways with openings inward and in the shape of long strips are evenly distributed along the circumference on the inner side wall of the spherical shell, and each outer raceway is arranged along the meridian direction of the spherical shell, and an inner raceway with openings outward and in the shape of long strips is correspondingly arranged on the outer side wall of the ball head corresponding to each outer raceway position, and each inner raceway is provided with a steel ball with the outer end located in the corresponding outer raceway; The right end of the spherical shell is fixedly installed with an adapter plate sleeved on the outside of the driving shaft, the middle part of the right end of the adapter plate is fixedly installed with a transmission sleeve sleeved on the outside of the driving shaft, and the inner side of the right end of the transmission sleeve is transmission-connected with the outer side of the left end of the driven shaft.

3. The downhole rotary guide device for oil production according to claim 1 or 2, characterized in that: The driving part includes an oil tank, an oil pump and an oil distribution plate. The oil tank and the oil distribution plate that can be sleeved on the outside of the drive shaft are fixedly installed in the cylindrical shell corresponding to the position between the inner ring platform and the inclination adjustment module at intervals on the left and right. An oil pump is arranged between the oil tank and the oil distribution plate. The oil inlet of the oil pump is connected to the oil tank, the oil outlet of the oil pump is connected to the oil inlet on the oil distribution plate, and the oil return port on the oil distribution plate is connected to the oil tank; Each linear actuator is a hydraulic cylinder. Each oil inlet on each hydraulic cylinder is connected to the corresponding oil outlet on the oil distribution plate through an oil supply pipeline. The oil supply pipeline is equipped with an electromagnetic reversing valve. The I-shaped bracket includes a left annular support plate, a connecting sleeve and a right annular support plate, and a connecting sleeve is sleeved on the outer side of the drive shaft at the right position of the oil distribution plate, and the left annular support plate and the right annular support plate are fixedly installed on the outer side of the left end and the outer side of the right end of the connecting sleeve respectively, and the outer side walls of the left annular support plate and the right annular support plate are fixedly installed together with the corresponding positions of the inner side wall of the cylindrical shell respectively; the left annular support plate is evenly distributed along the circumference with at least three first U-shaped notches opening outward and passing through left and right, and the right annular support plate at each first U-shaped notch position is provided with a second U-shaped notch opening outward and passing through left and right, and each second U-shaped notch is provided with a hydraulic cylinder with the left end located in the first U-shaped notch, and the left end of each hydraulic cylinder is fixedly installed on the corresponding position of the left end face of the left annular support plate through the first U-shaped block, and the right end of each hydraulic cylinder is fixedly installed on the corresponding position of the right end face of the right annular support plate through the second U-shaped block.

4. The downhole rotary guide device for oil production according to claim 3 is characterized in that: The inclination adjustment module also includes an adjusting rod, a ball and a limit end cover. The right end of the piston rod of each hydraulic cylinder is fixedly installed with an adjusting rod, and the right end of the adjusting rod is abutted against the corresponding position on the left side of the guide plate; a limit end cover with an opening facing left is fixedly installed on the outer side of the right end of the adjusting rod, a hemispherical groove with an opening facing right is provided in the middle of the right end surface of the adjusting rod, a hemispherical hole that passes through the left and right and is larger on the left and smaller on the right is provided in the middle of the limit end cover, a ball with the left end located in the hemispherical groove is provided in the hemispherical hole, the right end of the ball is exposed outside the limit end cover and abutted against the corresponding position on the left side of the guide plate.

5. The downhole rotary guide device for oil production according to claim 1, 2 or 4, characterized in that: The driving shaft includes an axially hollow main shaft and a reducer. The outer side of the left part of the main shaft is rotatably mounted with the inner side of the supporting inner ring through a bearing. The right end of the main shaft is fixedly mounted with the left end of the reducer. The outer diameter of the reducer gradually shrinks from the middle to the right end. The right end of the reducer is fixedly connected with the left end of the driven shaft through a universal joint. Or / and, the universal joint comprises a sealing pressure ring, a first sealing ring, an annular clamp, a second sealing ring, a corrugated disk and an elastic sleeve, a sealing pressure ring is fixedly installed on the inner side of the left end of the driven shaft by means of a thread, a limiting inner ring platform is provided on the inner side of the driven shaft corresponding to the right position of the sealing pressure ring, and the first sealing ring, the annular clamp and the second sealing ring are sequentially installed from left to right in the driven shaft corresponding to the position between the limiting inner ring platform and the sealing pressure ring; a corrugated disk mounting inner ring groove is provided on the inner side of the annular clamp, an elastic corrugated disk is provided in the corrugated disk mounting inner ring groove, a liquid passing hole which passes through the middle of the corrugated disk is provided, an elastic sleeve whose left end is located on the left side of the driven shaft is fixedly installed in the liquid passing hole, and the inner side of the left part of the elastic sleeve is fixedly installed together with the outer side of the right end of the driving shaft; a left annular protrusion protruding to the left is provided on the corrugated disk close to one side of the elastic sleeve, and a right annular protrusion protruding to the right is provided on the corrugated disk close to one side of the annular clamp.

6. The downhole rotary guide device for oil production according to claim 3, characterized in that: The driving shaft includes an axially hollow main shaft and a reducer. The outer side of the left part of the main shaft is rotatably mounted with the inner side of the supporting inner ring through a bearing. The right end of the main shaft is fixedly mounted with the left end of the reducer. The outer diameter of the reducer gradually shrinks from the middle to the right end. The right end of the reducer is fixedly connected with the left end of the driven shaft through a universal joint. Or / and, the universal joint comprises a sealing pressure ring, a first sealing ring, an annular clamp, a second sealing ring, a corrugated disk and an elastic sleeve, a sealing pressure ring is fixedly installed on the inner side of the left end of the driven shaft by means of a thread, a limiting inner ring platform is provided on the inner side of the driven shaft corresponding to the right position of the sealing pressure ring, and the first sealing ring, the annular clamp and the second sealing ring are sequentially installed from left to right in the driven shaft corresponding to the position between the limiting inner ring platform and the sealing pressure ring; a corrugated disk mounting inner ring groove is provided on the inner side of the annular clamp, an elastic corrugated disk is provided in the corrugated disk mounting inner ring groove, a liquid passing hole which passes through the middle of the corrugated disk is provided, an elastic sleeve whose left end is located on the left side of the driven shaft is fixedly installed in the liquid passing hole, and the inner side of the left part of the elastic sleeve is fixedly installed together with the outer side of the right end of the driving shaft; a left annular protrusion protruding to the left is provided on the corrugated disk close to one side of the elastic sleeve, and a right annular protrusion protruding to the right is provided on the corrugated disk close to one side of the annular clamp.

7. The downhole rotary guide device for oil production according to claim 1, 2, 4 or 6, characterized in that: It also includes an inclination sensor, which is fixedly installed on the upper left side of the guide plate and is used to detect the inclination angle of the guide plate; Or / and, the universal support part includes a self-lubricating radial spherical bearing and a bearing pressure ring, the inner side of the right part of the cylindrical shell is fixedly installed with the outer side of the outer ring of the self-lubricating radial spherical bearing, and the inner side of the inner ring of the self-lubricating radial spherical bearing is fixedly installed with the outer side of the middle part of the sleeve; a stop inner ring platform is provided on the inner side of the cylindrical shell corresponding to the left end of the self-lubricating radial spherical bearing, and the right end of the stop inner ring platform abuts against the left end of the self-lubricating radial spherical bearing; a bearing pressure ring is fixedly installed on the inner side of the right end of the cylindrical shell, and the left end abuts against the right end of the self-lubricating radial spherical bearing, the inner diameter of the bearing pressure ring is larger than the outer diameter of the sleeve, and a tapered groove with a left smaller shape and a right larger shape is provided on the inner side of the right part of the bearing pressure ring; Or / and, rolling bearings are provided between the inner side of the driving part and the outer side of the driving shaft, between the inner sides of the left and right ends of the I-shaped bracket and the corresponding positions of the outer side of the driving shaft, and between the inner side of the sleeve and the outer side of the driven shaft; Or / and, the cylindrical shell includes a left cylindrical shell and a right cylindrical shell, the outer side of the right end of the left cylindrical shell and the inner side of the left end of the right cylindrical shell are installed together through threads, and the right end of the left cylindrical shell is evenly distributed along the circumference with a number of threaded holes opening outward, and the right cylindrical shell is provided with a limiting hole corresponding to the position of each threaded hole, and each limiting hole is provided with a fixing screw with an inner end located in the threaded hole.

8. The downhole rotary guide device for oil production according to claim 3, characterized in that: It also includes an inclination sensor, which is fixedly installed on the upper left side of the guide plate and is used to detect the inclination angle of the guide plate; Or / and, the universal support part includes a self-lubricating radial spherical bearing and a bearing pressure ring, the inner side of the right part of the cylindrical shell is fixedly installed with the outer side of the outer ring of the self-lubricating radial spherical bearing, and the inner side of the inner ring of the self-lubricating radial spherical bearing is fixedly installed with the outer side of the middle part of the sleeve; a stop inner ring platform is provided on the inner side of the cylindrical shell corresponding to the left end of the self-lubricating radial spherical bearing, and the right end of the stop inner ring platform abuts against the left end of the self-lubricating radial spherical bearing; a bearing pressure ring is fixedly installed on the inner side of the right end of the cylindrical shell, and the left end abuts against the right end of the self-lubricating radial spherical bearing, the inner diameter of the bearing pressure ring is larger than the outer diameter of the sleeve, and a tapered groove with a left smaller shape and a right larger shape is provided on the inner side of the right part of the bearing pressure ring; Or / and, rolling bearings are provided between the inner side of the driving part and the outer side of the driving shaft, between the inner sides of the left and right ends of the I-shaped bracket and the corresponding positions of the outer side of the driving shaft, and between the inner side of the sleeve and the outer side of the driven shaft; Or / and, the cylindrical shell includes a left cylindrical shell and a right cylindrical shell, the outer side of the right end of the left cylindrical shell and the inner side of the left end of the right cylindrical shell are installed together through threads, and the right end of the left cylindrical shell is evenly distributed along the circumference with a number of threaded holes opening outward, and the right cylindrical shell is provided with a limiting hole corresponding to the position of each threaded hole, and each limiting hole is provided with a fixing screw with an inner end located in the threaded hole.

9. The downhole rotary guide device for oil production according to claim 5, characterized in that: It also includes an inclination sensor, which is fixedly installed on the upper left side of the guide plate and is used to detect the inclination angle of the guide plate; Or / and, the universal support part includes a self-lubricating radial spherical bearing and a bearing pressure ring, the inner side of the right part of the cylindrical shell is fixedly installed with the outer side of the outer ring of the self-lubricating radial spherical bearing, and the inner side of the inner ring of the self-lubricating radial spherical bearing is fixedly installed with the outer side of the middle part of the sleeve; a stop inner ring platform is provided on the inner side of the cylindrical shell corresponding to the left end of the self-lubricating radial spherical bearing, and the right end of the stop inner ring platform abuts against the left end of the self-lubricating radial spherical bearing; a bearing pressure ring is fixedly installed on the inner side of the right end of the cylindrical shell, and the left end abuts against the right end of the self-lubricating radial spherical bearing, the inner diameter of the bearing pressure ring is larger than the outer diameter of the sleeve, and a tapered groove with a left smaller shape and a right larger shape is provided on the inner side of the right part of the bearing pressure ring; Or / and, rolling bearings are provided between the inner side of the driving part and the outer side of the driving shaft, between the inner sides of the left and right ends of the I-shaped bracket and the corresponding positions of the outer side of the driving shaft, and between the inner side of the sleeve and the outer side of the driven shaft; Or / and, the cylindrical shell includes a left cylindrical shell and a right cylindrical shell, the outer side of the right end of the left cylindrical shell and the inner side of the left end of the right cylindrical shell are installed together through threads, and the right end of the left cylindrical shell is evenly distributed along the circumference with a number of threaded holes opening outward, and the right cylindrical shell is provided with a limiting hole corresponding to the position of each threaded hole, and each limiting hole is provided with a fixing screw with an inner end located in the threaded hole.

10. An adjustment method using the downhole rotary guide device for oil production according to any one of claims 1 to 9, characterized in that: include: The target tilt angle and target tilt direction to which the guide plate needs to be adjusted are obtained, and the target coordinates Zi of the z-axis of each contact point are calculated respectively by the target tilt angle and the target tilt direction, where i is the number of each linear actuator; Detect the extension and retraction amount of the extended end of each linear actuator, calculate the actual tilt angle and actual tilt direction of the guide plate in the current state, and determine the actual coordinate Zi' of the z-axis of each contact point in the current state, where i is the number of each linear actuator; The extension and retraction amount of the extended end of each linear actuator is calculated respectively, that is, the difference ΔZi between the actual coordinates of each contact point and the target coordinates, where the positive and negative values ​​indicate the direction, a positive value indicates the extension direction, and a negative value indicates the retraction direction; The extended ends of the linear actuators are controlled to be extended and retracted accordingly according to the extension amounts of the extended ends of the linear actuators, so that the inclination angle and the inclination direction of the guide plate are adjusted to the target inclination angle and the target inclination direction.

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