CN119352899A - Downhole rotary guide device and adjustment method for oil production - Google Patents
Downhole rotary guide device and adjustment method for oil production Download PDFInfo
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- CN119352899A CN119352899A CN202411909808.1A CN202411909808A CN119352899A CN 119352899 A CN119352899 A CN 119352899A CN 202411909808 A CN202411909808 A CN 202411909808A CN 119352899 A CN119352899 A CN 119352899A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000005553 drilling Methods 0.000 claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims description 35
- 238000007789 sealing Methods 0.000 claims description 35
- 238000009826 distribution Methods 0.000 claims description 27
- 239000003638 chemical reducing agent Substances 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 230000004044 response Effects 0.000 abstract description 3
- 230000000875 corresponding effect Effects 0.000 description 47
- 230000007246 mechanism Effects 0.000 description 40
- 230000006835 compression Effects 0.000 description 14
- 238000007906 compression Methods 0.000 description 14
- 230000033001 locomotion Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000008602 contraction Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
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- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
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Abstract
本发明涉及定向钻井技术领域，是一种石油开采井下旋转导向装置及调节方法，前者包括筒状壳体、中部具有第一轴向流道的驱动轴和中部具有第二轴向流道的从动轴，筒状壳体左端内侧设有支撑内环台，支撑内环台内侧与驱动轴左部外侧转动安装在一起，驱动轴的轴线与筒状壳体的轴线重合。本发明结构合理而紧凑，其仅通过调节各液压缸活塞杆的伸缩长度，即可控制导向盘在调节范围内按照任意角度倾斜，而倾斜的导向盘则能通过套筒驱动从动轴按照预定角度和方向弯曲调节，大大简化了旋转导向装置的机械结构，减少了零部件的数量，提高了可靠性和稳定性，同时简化了旋转导向装置的控制参数和控制程序，从而有效提高了调节控制的响应速度和控制精度。
The present invention relates to the technical field of directional drilling, and is a rotary guide device and adjustment method for oil production underground, the former comprising 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, and the axis of the driving shaft coincides with the axis of the cylindrical shell. The structure of the present invention is reasonable and compact, and the guide plate can be controlled to tilt at any angle within the adjustment range by only 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 at a predetermined angle and direction, which greatly simplifies the mechanical structure of the rotary guide device, reduces the number of components, 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.
Description
Technical Field
The invention relates to the technical field of directional drilling, in particular to an underground rotary guiding device for petroleum exploitation and an adjusting method.
Background
The rotary steerable drilling system (Rotary Steerable System, abbreviated as RSS) was developed on the basis of a conventional sliding steerable drilling system, which is designed to automatically steer the drill string by changing its orientation and drilling deviation while rotating the drill string by means of a bottom steering actuator. The rotary steering drilling system adopts measurement while drilling technology, can collect well bottom conditions in real time through a microprocessor installed underground, and transmits drilling fluid to the ground to form bidirectional closed-loop control between the ground and the well bottom, thereby realizing automatic steering. Because the rotary steering drilling tool is used for rotary drilling, compared with the traditional sliding steering drilling tool, the rotary steering drilling tool overcomes the defect of high friction resistance during drilling, reduces the tripping times, has smoother borehole quality, and can effectively improve the development efficiency and economic benefit of an oil gas well.
At present, rotary steering drilling tools can be divided into pushing type and pointing type according to the action mode of a steering mechanism, and can be divided into dynamic type and static type according to whether an outer barrel of the steering tool rotates or not. The push-against type drill bit is characterized in that the push-against type drill bit is used for guiding a guide mechanism to act on a well wall, the generated reaction force is used for controlling the direction of the drill bit, the mode can obtain larger biasing force at the drill bit, spiral well holes are easy to generate, the guide capability of the spiral well holes is limited by stratum structures, the guide capability in soft stratum is poor, underground accidents are easy to generate, the guide mechanism in the tool is used for applying force to a drill bit connecting shaft so as to control the direction of the drill bit, the mode is used for drilling the well holes smoothly and regularly, the guide capability of the drill bit is strong and is not influenced by stratum, the quality of the well holes is improved, and underground safety is guaranteed.
The conventional static bias directional rotary steering drilling tool has the characteristics of small friction resistance, high efficiency, contribution to eliminating borehole spiral, small vibration and good borehole cleaning effect, and the steering actuating mechanism does not rotate along with the drill string in the drilling process, and the steering actuating mechanism provides steering force in a certain fixed direction when steering is required. Haliburton discloses a biasing device for a static directional rotary steerable drilling tool, which comprises an inner eccentric ring and an outer eccentric ring, wherein the inner eccentric ring and the outer eccentric ring are driven to rotate by two motors through gear transmission respectively, so that a drill bit is controlled to point in a desired direction. When the double eccentric ring reaches the desired position, the proposal proposes to use a vector controlled drive motor to maintain the desired bit direction. In addition, it is proposed to add a braking device to the motor or to add a self-locking mechanism to the gear transmission to lock the position of the double eccentric ring. However, the motor vector control belongs to a method for dynamically adjusting the direction of the drill bit, the method is complex, the control effect is easily influenced by the disturbance of the drill bit, and the fine adjustment of the drilling direction is poor.
In the prior art, the adjustment control of the rotary guiding device is usually realized by adopting a hydraulic driving mode, but a large number of driving components are usually required to cooperate to realize the adjustment, and the arrangement of a large number of hydraulic elements leads to the structural complexity of the rotary guiding device, and the controllability and the stability of the device are poor.
Disclosure of Invention
The invention provides an underground rotary guiding device for petroleum exploitation and an adjusting method, which overcome the defects of the prior art, and can effectively solve the problems that the conventional rotary guiding device is usually in a hydraulic driving mode to realize adjustment control, a large number of driving components are required to cooperate to realize adjustment, and a large number of hydraulic elements are arranged to complicate the structure of the rotary guiding device and the controllability and stability of the device are poor.
The technical scheme is that the underground rotary guiding device for petroleum exploitation comprises a cylindrical shell, a driving shaft with a first axial flow passage in the middle and a driven shaft with a second axial flow passage in the middle, wherein a supporting inner annular table is arranged on the inner side of the left end of the cylindrical shell, the inner side of the supporting inner annular table 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.
The inner side of the right part of the cylindrical shell is fixedly provided with a universal supporting part, the middle part of the universal supporting part is provided with an axial channel, the inner side of the universal supporting part is fixedly provided with a hollow sleeve, the axis of the sleeve coincides with the axis of the cylindrical shell, the universal supporting part can perform tilting motion in a certain angle range along with the tilting of the sleeve, and the left end of the driven shaft passes through the inner side of the sleeve from right to left and is connected with the outer side of the right part of the driving shaft through a ball cage type universal joint in a transmission way.
The outer side of the right end of the driving shaft is fixedly communicated with the inner side of the left end of the driven shaft through a universal joint part, so that drilling fluid can flow into the second axial flow passage from the first axial flow passage.
The device comprises a driving part, an inclination adjusting module, a sleeve, a driving shaft, a driving part, an I-shaped support and a guiding disc, wherein the driving part and the inclination adjusting module are fixedly arranged in a cylindrical shell corresponding to the right side of the supporting inner ring table, the inclination adjusting module comprises a linear actuating mechanism, the I-shaped support and the guiding disc, the guiding disc is fixedly arranged at the left end of the sleeve and can be sleeved on the outer side of the left part of the driven shaft, the I-shaped support is fixedly arranged in the cylindrical shell corresponding to the right side of the driving part and sleeved on the outer side of the middle part of the driving shaft, at least three linear actuating mechanisms with extending ends capable of extending rightwards are uniformly distributed and fixedly arranged on the I-shaped support along the circumference, and the right ends of the extending ends of the linear actuating mechanisms respectively support against the corresponding positions of the left side of the guiding disc.
The driving part can respectively control the extension length of the extension end of each linear actuating mechanism, so that the guide disc can be correspondingly bent according to a preset angle and a preset direction, and the guide disc can further drive the driven shaft to be correspondingly bent according to the preset angle and the preset direction through the sleeve.
The following are further optimizations and/or improvements to the above-described inventive solution:
The ball cage type universal joint comprises a ball head, a limit nut, a spherical shell, steel balls, an adapter plate and a transmission sleeve, wherein the outer side of the right part of a driving shaft is in transmission connection with the drum-shaped ball head, the limit nut with the left end propped against the right end of the ball head is connected to the outer side of the driving shaft corresponding to the right side of the ball head through threads, the spherical shell with the shape matched with the shape of the ball head is sleeved on the outer side of the ball head, a plurality of outer raceways with inward openings and in strip shapes are uniformly distributed on the inner side wall of the spherical shell along the circumferential direction, each outer raceway is arranged along the warp direction of the spherical shell, each outer side wall of the ball head corresponding to the position of each outer raceway is respectively and correspondingly provided with an inner raceway with an outward opening and in strip shape, the steel balls with the outer ends positioned in the corresponding outer raceways are respectively arranged in each inner raceway, the adapter plate is fixedly sleeved on the right end of the spherical shell, the middle of the right end of the adapter plate is fixedly sleeved on the outer side of the driving shaft, the transmission sleeve is sleeved on the outer side of the right end of the driving shaft, and the inner side of the right end of the transmission sleeve is connected with the left end of the driven shaft.
The driving part comprises an oil tank, an oil pump and an oil distribution disc, wherein the oil tank and the oil distribution disc which can be sleeved outside a driving shaft are fixedly arranged at left and right intervals in a cylindrical shell corresponding to the position between an inner annular table and an inclination adjusting module, the oil pump is arranged between the oil tank and the oil distribution disc, an oil inlet of the oil pump is connected with the oil tank, an oil outlet of the oil pump is connected with an oil inlet on the oil distribution disc, an oil return port on the oil distribution disc is connected with the oil tank, each linear actuating mechanism is a hydraulic cylinder, each oil inlet on each hydraulic cylinder is respectively connected with a corresponding oil outlet on the oil distribution disc through an oil supply pipeline, an electromagnetic reversing valve is arranged on the oil supply pipeline, each I-shaped support comprises a left annular support plate, a connecting sleeve and a right annular support plate, a driving shaft corresponding to the right position of the oil distribution disc is sleeved with a connecting sleeve, the left end outside of the connecting sleeve is fixedly arranged with the left annular support plate and the right annular support plate respectively, the outer side wall of the left annular support plate and the right annular support plate are fixedly arranged together with the corresponding positions of the inner side wall of the cylindrical shell respectively, at least three first U-shaped notches which are outwards and leftwards and rightwards communicated are circumferentially arranged on the left annular support plate, each first U-shaped notch is respectively arranged on the left annular support plate, each first U-shaped notch is fixedly arranged on the left end face of each U-shaped support plate through the corresponding to the corresponding U-shaped notch, and the corresponding U-shaped support plate is fixedly arranged on the left end face through the left end and right end of the corresponding U-shaped support plate through the corresponding U-shaped support plate.
The inclination adjusting module can further comprise adjusting rods, balls and limiting end covers, wherein the right end of each piston rod of each hydraulic cylinder is fixedly provided with the adjusting rods, the right ends of the adjusting rods are propped against the corresponding positions of the left sides of the guide plates, the outer sides of the right ends of the adjusting rods are fixedly provided with the left limiting end covers, the middle parts of the right end faces of the adjusting rods are provided with hemispherical grooves with the right openings, the middle parts of the limiting end covers are provided with hemispherical holes which are communicated left and right and are left, right and left small, the hemispherical holes are internally provided with balls with the left ends located in the hemispherical grooves, and the right ends of the balls are exposed out of the limiting end covers and are propped against the corresponding positions of the left sides of the guide plates.
The driving shaft can comprise an axially hollow main shaft and a reducer pipe, the outer side of the left part of the main shaft and the inner side of the supporting inner ring table are rotatably installed together through a bearing, the right end of the main shaft and the left end of the reducer pipe are fixedly installed together, the outer diameter from the middle part of the reducer pipe to the right end of the reducer pipe is gradually contracted and reduced, and the right end of the reducer pipe is fixedly communicated with the left end of the driven shaft through a universal switching part.
The universal switching part comprises a sealing compression ring, a first sealing ring, an annular clamping piece, a second sealing ring, a corrugated disc and an elastic sleeve, wherein the sealing compression ring is fixedly installed on the inner side of the left end of a driven shaft through threads, a limiting inner annular table is arranged on the inner side of the driven shaft corresponding to the right position of the sealing compression ring, the first sealing ring, the annular clamping piece and the second sealing ring are sequentially installed in the driven shaft corresponding to the position between the limiting inner annular table and the sealing compression ring from left to right, an annular groove is formed in the inner side of the annular clamping piece, an elastic corrugated disc is arranged in the annular groove, a left-right through liquid passing hole is formed in the middle of the corrugated disc, the elastic sleeve with the left end located on the left of the driven shaft is fixedly installed in the liquid passing hole, a left annular bulge protruding leftwards is arranged on the corrugated disc close to one side of the elastic sleeve, and a right annular bulge protruding rightwards is arranged on the corrugated disc close to one side of the annular clamping piece.
The guide disc can further comprise an inclination sensor, and the inclination sensor for detecting the inclination angle of the guide disc is fixedly arranged at the upper part of the left side of the guide disc.
The universal supporting part comprises a self-lubricating radial joint bearing and a bearing compression ring, wherein the inner side of the right part of a cylindrical shell is fixedly arranged with the outer side of the outer ring of the self-lubricating radial joint bearing, the inner side of the inner ring of the self-lubricating radial joint bearing is fixedly arranged with the outer side of the middle part of a sleeve, a stop inner ring table is arranged on the inner side of the cylindrical shell corresponding to the left end position of the self-lubricating radial joint bearing, the right end of the stop inner ring table is propped against the left end of the self-lubricating radial joint bearing, the inner side of the right end of the cylindrical shell is fixedly provided with the bearing compression ring of which the left end is propped against the right end of the self-lubricating radial joint bearing, the inner diameter of the bearing compression ring is larger than the outer diameter of the sleeve, and a conical groove which is small left and large is arranged on the inner side of the right part of the bearing compression ring.
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.
The cylindrical shell can comprise 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, a plurality of outwards opened threaded holes are uniformly distributed in the right end of the left cylindrical shell along the circumference, limiting holes are formed in the right cylindrical shell corresponding to the positions of each threaded hole, and a set screw with the inner end located in the threaded hole is arranged in each limiting hole.
The second technical scheme of the invention is realized by the following measures: a method of adjusting a rotary steerable device downhole in oil production, comprising:
And acquiring a target inclination angle and a target inclination direction which are required to be adjusted by the guide disc, and respectively calculating target coordinates Zi of the z axis of each contact point according to the target inclination angle and the target inclination direction, wherein i is the number of each linear actuating mechanism.
The extension and contraction amount of the extending end of each linear actuating mechanism is detected, the actual inclination angle and the actual inclination direction of the current state of the guide disc are calculated, and the actual coordinate Zi' of the z axis of each contact point in the current state is determined, wherein i is the number of each linear actuating mechanism.
And respectively calculating the expansion and contraction amount of the extending end of each linear actuating mechanism, namely the difference delta Zi between the actual coordinates and the target coordinates of each contact point, wherein the positive value and the negative value of the numerical value represent directions, the positive value represents the extending direction, and the negative value represents the retracting direction.
And respectively controlling the extending ends of the linear actuating mechanisms to correspondingly extend and retract according to the extending amounts of the extending ends of the linear actuating mechanisms, so that the inclination angle and the inclination direction of the guide disc are adjusted to be the target inclination angle and the target inclination direction.
The invention has reasonable and compact structure and convenient use, the inclined guide disc can be controlled to incline at any angle in the adjusting range by adjusting the telescopic length of the piston rod of each hydraulic cylinder, and the inclined guide disc can drive the driven shaft to bend and adjust according to the preset angle and direction through the sleeve, thereby realizing the guiding function, greatly simplifying the mechanical structure of the rotary guiding device, reducing the number of parts, reducing the cost, improving the reliability and the stability, and simplifying the control parameters and the control program of the rotary guiding device, thereby effectively improving the response speed and the control precision of the adjusting control.
Drawings
FIG. 1 is a schematic view of the structure of embodiments 1-10 of the present invention in front view, partially in section.
FIG. 2 is an enlarged radial cross-sectional schematic view of the ball and socket joint of FIG. 1.
FIG. 3 is a schematic diagram of an exploded view of the tilt adjustment module of FIG. 1.
Fig. 4 is an exploded view of the universal adapter and driven shaft of fig. 1.
Fig. 5 is a schematic perspective view of the annular clip, corrugated disk and elastic sleeve of fig. 1.
Fig. 6 is an enlarged schematic view of the structure at a in fig. 1.
Fig. 7 is an enlarged schematic view of the structure at B in fig. 1.
FIG. 8 is an enlarged schematic axial sectional view of the adjustment rod, ball and limit end cap of FIG. 1.
Fig. 9 is an enlarged axial sectional view of the universal support section in embodiment 1 of the present invention.
Fig. 10 is a flowchart of embodiment 11 of the present invention.
The codes in the drawings are respectively: 1 is a first axial flow passage, 2 is a second axial flow passage, 3 is a driven shaft, 4 is a supporting inner annular table, 5 is a sleeve, 6 is a guide disc, 7 is a ball head, 8 is a limit nut, 9 is a spherical shell, 10 is a steel ball, 11 is an adapter plate, 12 is a transmission sleeve, 13 is an outer raceway, 14 is an inner raceway, 15 is an oil tank, 16 is an oil pump, 17 is an oil distribution disc, 18 is a hydraulic cylinder, 19 is an oil supply pipeline, 20 is an electromagnetic reversing valve, 21 is a left annular supporting plate, 22 is a connecting sleeve, 23 is a right annular supporting plate, 24 is a first U-shaped notch, 25 is a second U-shaped notch, 26 is a first U-shaped clamping block, 27 is a second U-shaped clamping block, 28 is an adjusting rod, 29 is a ball, 30 is a main shaft, 31 is a reducer, 32 is a bearing, 33 is a sealing compression ring, 34 is a first sealing ring, 35 is an annular clamping piece, 36 is a second sealing ring, 37 is a corrugated disk, 38 is an elastic sleeve, 39 is a position-limiting inner ring table, 40 is a left annular bulge, 41 is a right annular bulge, 42 is an inclination sensor, 43 is a self-lubricating radial joint bearing, 44 is a bearing compression ring, 45 is a stop inner ring table, 46 is a conical 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 fixed ring, 52 is a spherical rotating body, 53 is a position-limiting end cover, 54 is a driving surface, and 55 is a piston rod.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout form of fig. 1 of the specification, for example, the positional relationship of front, rear, upper, lower, left, right, etc. is determined according to the layout direction of the drawing of the specification.
The invention is further described below with reference to examples and figures:
embodiment 1 As shown in figures 1-9, the downhole rotation guiding device for oil exploitation comprises a cylindrical shell, a driving shaft with a first axial flow channel 1 in the middle part and a driven shaft 3 with a second axial flow channel 2 in the middle part, wherein a supporting inner ring table 4 is arranged on the inner side of the left end of the cylindrical shell, the inner side of the supporting inner ring table 4 is rotatably installed with the outer side of the left part of the driving shaft, and the axis of the driving shaft is coincident with the axis of the cylindrical shell.
In the technical scheme, the driving shaft and the cylindrical shell are coaxially arranged, the inner side of the supporting inner ring table 4 can be provided with a wear-resistant coating for increasing the wear resistance of the supporting inner ring table 4, and a self-lubricating bearing or a shaft sleeve can be arranged between the supporting inner ring table 4 and the driving shaft to reduce the wear of the supporting inner ring table 4 and enable the rotation between the supporting inner ring table 4 and the driving shaft to be smoother.
In the use process, the driving shaft is in transmission connection with a power output shaft of the underground drilling tool driving device, the driven shaft 3 is in transmission connection with the drill bit 50, and the tubular shell is connected with the tubular shell of the drill column.
The inner side of the right part of the cylindrical shell is fixedly provided with a universal supporting part with an axial channel in the middle, the inner side of the universal supporting part is fixedly provided with a hollow sleeve 5, the axis of the sleeve 5 coincides with the axis of the cylindrical shell, the universal supporting part can do tilting motion within a certain angle range along with the tilting of the sleeve 5, and the left end of the driven shaft 3 passes through the inner side of the sleeve 5 from right to left and is connected with the outer side of the right part of the driving shaft through a ball cage type universal joint in a transmission way.
According to the technical scheme, the sleeve 5 and the cylindrical shell are coaxially arranged, so that the driven shaft 3 and the cylindrical shell can be coaxially arranged, the coaxiality of the driving shaft and the driven shaft 3 is higher, the transmission effect is better, and a self-lubricating bearing or a shaft sleeve can be arranged between the driven shaft 3 and the sleeve 5 for reducing friction and abrasion.
The ball cage type universal joint is the prior art, also called a ball cage type universal joint, and is respectively connected with a driving shaft and a driven shaft 3 through a ball cage outer ring and a star-shaped inner ring, the middle part of a force transmission steel ball is arranged in a window of a retainer, the retainer is sleeved between the ball cage outer ring and the star-shaped inner ring, the force transmission steel ball can roll in a raceway formed by spherical grooves between the ball cage outer ring and the star-shaped inner ring, when the sleeve 5 drives the driven shaft 3 to bend, even if the driving shaft and the driven shaft 3 are not coaxial, a certain angle exists between the axes of the driving shaft and the driven shaft, the rotating speed between the driving shaft and the driven shaft 3 can be kept synchronous, and the driving force can be transmitted to the driven shaft 3 from the driving shaft through the ball cage type universal joint, so that the driven shaft 3 drives the drill bit 50 to rotate and drill according to a preset track.
According to the requirements, as shown in fig. 8, the universal supporting part can comprise a fixed ring 51 and a spherical rotating body 52 with an axial through hole, wherein the outer side of the fixed ring 51 is fixedly installed with the inner side of the right part of the cylindrical shell, the inner side of the fixed ring 51 is provided with a spherical inner ring groove matched with the 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, and in addition, the fixed ring 51 can be two semi-rings which are vertically symmetrical for facilitating the installation of the spherical rotating body 52. In the use process, when the sleeve 5 is inclined, the spherical rotating body 52 can correspondingly rotate a certain angle along with the sleeve, and reliable support and constraint are provided for the sleeve and the driven shaft 3 all the time, so that the vibration of the driven shaft 3 is reduced, and the breakage of the driven shaft 3 is avoided.
The outer side of the right end of the driving shaft is fixedly communicated with the inner side of the left end of the driven shaft 3 through a universal joint part, so that drilling fluid can flow into the second axial flow passage 2 from the first axial flow passage 1.
In use, drilling fluid can flow through the first axial flow passage 1 in the drive shaft, through the universal joint, to the second axial flow passage 2 in the driven shaft 3, and finally the drilling fluid can be supplied to the drill bit 50.
According to the requirement, the universal joint part can be a metal or nonmetal corrugated pipe in the prior art or an elastic material hose, such as a corrosion-resistant rubber pipe, so that when the driven shaft 3 inclines to any direction, the universal joint part can be deformed in a telescopic way along the corresponding direction without damage, and the drilling fluid can smoothly flow into the second axial flow passage 2 from the first axial flow passage 1 all the time.
The driving part and the inclination adjusting module are fixedly arranged in the cylindrical shell corresponding to the right side position of the supporting inner ring table 4, the inclination adjusting module comprises a linear actuating mechanism, an I-shaped support and a guide disc 6, the guide disc 6 which can be sleeved on the outer side of the left part of the driven shaft 3 is fixedly arranged at the left end of the sleeve 5, the I-shaped support which is sleeved on the outer side of the middle part of the driving shaft is fixedly arranged in the cylindrical shell corresponding to the right side position of the driving part, at least three linear actuating mechanisms with extending ends capable of extending rightwards are uniformly and fixedly arranged on the I-shaped support along the circumference, and the right ends of the extending ends of the linear actuating mechanisms are respectively propped against the corresponding positions of the left side of the guide disc 6.
In the technical scheme, the linear actuating mechanism can be a gear-rack transmission mechanism in the prior art, at the moment, the driving part can be realized through a rotating motor in the prior art, the rotating motor drives the gear to rotate, so that the rack can stretch and move left and right along a preset track, the linear actuating mechanism can also be an electric push rod in the prior art, at the moment, the driving part and the electric push rod are integrated together, the linear actuating mechanism can also be a hydraulic cylinder, and at the moment, the driving part can be a hydraulic control system with a hydraulic pump. The I-shaped bracket can be a mounting bracket with an I-shaped axial section and a hollow inside, and can be integrally formed by welding or machining.
The driving part can respectively control the extension length of the extension end of each linear actuating mechanism, so that the guide disc 6 can be correspondingly bent according to a preset angle and a preset direction, and the guide disc 6 can further drive the driven shaft 3 to be correspondingly bent according to the preset angle and the preset direction through the sleeve 5.
In the use process, as the right end of the extending end of each linear actuating mechanism is respectively propped against the corresponding position on the left side of the guide disc 6, and the inclination of the driven shaft 3 is driven by the sleeve 5, the left end of the sleeve 5 is fixed with the middle part on the right side of the guide disc 6, the inclination angle of the guide disc 6 can be controlled by respectively controlling the extending length of the extending end of each linear actuating mechanism, so that the inclined guide disc 6 can drive the driven shaft 3 to bend by a preset angle through the sleeve 5, and the drill 50 can drill according to a set track, wherein after the driven shaft 3 is inclined, a certain angle exists between the axis of the driven shaft 3 and the axis of the driving shaft.
In this embodiment, the preferred number of the linear actuators is three, which is mainly based on the three-point coplanarity principle, that is, one plane can be determined through any 3 points not on the same straight line, so that by controlling the extending lengths of the extending ends of the three linear actuators, the guiding disc 6 can be pushed to incline according to a predetermined angle, and the guiding disc 6 drives the driven shaft 3 to incline by a predetermined angle correspondingly through the sleeve 5, thereby realizing angle adjustment and rotation guiding. The number of parts can be reduced by reducing the number of the linear actuating mechanisms, the structure of the device is simplified, the cost is reduced, meanwhile, the coordination control difficulty of each linear actuating mechanism is reduced, and the control precision is improved.
In addition, the three linear actuating mechanisms are uniformly distributed along the circumference, so that the difference between the extending ends of the three linear actuating mechanisms is 120 degrees, the stress of the guide disc 6 is balanced, the linear actuating mechanisms can be staggered at the maximum central angle, the guide disc 6 is driven by smaller expansion and contraction amount to perform larger-angle inclination adjustment, the adjustment difficulty is effectively reduced, the rotatable adjustment range of the invention is improved, and the travel of each linear actuating mechanism is fully utilized.
The invention has reasonable and compact structure and convenient use, can control the inclination angle of the guide disc 6 through the cooperative action of the three linear actuating mechanisms, and the inclined guide disc 6 can drive the driven shaft 3 to incline and bend towards a set angle through the sleeve 5, thereby realizing the guide function, greatly reducing the number of parts, simplifying the structure of the device, effectively reducing the cost, simultaneously reducing the cooperative control difficulty of each linear actuating mechanism and improving the control precision of the inclination adjusting module.
The oil exploitation downhole rotation guide device can be further optimized or/and improved according to actual needs:
In the embodiment 2, as shown in figures 1,2 and 6, the ball cage type universal joint comprises 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, wherein the drum-shaped ball head 7 is connected to the outer side of the right part of a driving shaft in a transmission manner, and the limit nut 8, which is propped against the right end of the ball head 7, of the left end of the driving shaft corresponding to the right side position of the ball head 7 is connected to the outer side of the driving shaft through threads.
In the above technical scheme, the ball head 7 and the driving shaft can be in transmission connection through a transmission structure with a drum-shaped, square or hexagonal section in the prior art, and can also be in transmission connection through a flat key or a spline. In this embodiment, the driving surface 54 is disposed on the outer side of the right portion of the driving shaft, the driving surface 54 is parallel to the axis of the driving shaft, a thrust surface adapted to the driving surface 54 is disposed on the inner side of the ball head 7, when the ball head 7 is sleeved on the outer side of the right portion of the driving shaft, the thrust surface and the driving surface 54 are just in contact with each other, so that the driving connection between the ball head 7 and the driving shaft is achieved, the left end of the ball head 7 can be limited through a shaft shoulder or a shaft collar disposed on the driving shaft, and the limiting nut 8 can effectively prevent the ball head 7 from loosening and falling.
The ball head 7 is sleeved with a spherical shell 9 with the shape matched with that of the ball head 7, a plurality of inward opening long-strip-shaped outer rollaway nest 13 are uniformly distributed on the inner side wall of the spherical shell 9 along the circumference, each outer rollaway nest 13 is arranged along the warp direction of the spherical shell 9, the outer side wall of the ball head 7 corresponding to the position of each outer rollaway nest 13 is correspondingly provided with an outward opening long-strip-shaped inner rollaway nest 14, and each inner rollaway nest 14 is internally provided with a steel ball 10 with the outer end positioned in the corresponding outer rollaway nest 13. The right end of the spherical shell 9 is fixedly provided with an adapter plate 11 sleeved outside the driving shaft, the middle part of the right end of the adapter plate 11 is fixedly provided with a transmission sleeve 12 sleeved outside the driving shaft, and the inner side of the right end of the transmission sleeve 12 is in transmission connection with the outer side of the left end of the driven shaft 3.
In the above technical scheme, after the steel balls 10 are embedded between the inner roller path 14 and the outer roller path 13, the steel balls can roll along the warp direction of the ball head 7, so that the spherical shell 9 can rotate around the spherical center of the ball head 7 at any angle in an adjusting range, the driving shaft and the driven shaft 3 can bend at a set angle, but the driving force can still be transmitted to the spherical shell 9 through the ball head 7 through the steel balls 10, and finally transmitted to the driven shaft 3 through the spherical shell 9, the adapter plate 11 and the transmission sleeve 12, and the rotation speed between the driving shaft and the driven shaft 3 can be kept synchronous under the inclined state of the driven shaft 3, and the torque between the driving shaft and the driven shaft 3 is transmitted.
According to the requirements, the transmission sleeve 12 and the driven shaft 3 can be in transmission connection through a transmission structure with a drum-shaped, square or hexagonal section in the prior art, and can also be in transmission connection through a flat key or a spline. In this embodiment, the outer side of the left end of the driven shaft 3 is provided with a thrust surface, the thrust surface is parallel to the axis of the driven shaft 3, the inner side of the right part of the transmission sleeve 12 is provided with a driving surface matched with the thrust surface, and 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 just completely attached, so that the transmission connection between the transmission sleeve 12 and the driven shaft 3 is more reliable and stable.
In the embodiment 3, as shown in figures 1 and 3, a driving part comprises an oil tank 15, an oil pump 16 and an oil distribution disc 17, the oil tank 15 and the oil distribution disc 17 which can be sleeved outside a driving shaft are fixedly arranged in a cylindrical shell corresponding to the position between an inner ring table 4 and a gradient adjusting module at left and right intervals, the oil pump 16 is arranged between the oil tank 15 and the oil distribution disc 17, an oil inlet of the oil pump 16 is connected with the oil tank 15, an oil outlet of the oil pump 16 is connected with an oil inlet on the oil distribution disc 17, an oil return port on the oil distribution disc 17 is connected with the oil tank 15, each linear actuating mechanism is a hydraulic cylinder 18, each oil inlet on each hydraulic cylinder 18 is respectively connected with a corresponding oil outlet on the oil distribution disc 17 through an oil supply pipeline 19, and an electromagnetic reversing valve 20 is arranged on the oil supply pipeline 19.
In the above technical solution, the oil pump 16 can provide power for each hydraulic cylinder 18, and the electromagnetic directional valve 20 can rapidly control the motion of each hydraulic cylinder 18, and in this embodiment, the hydraulic cylinders 18 can be double-acting hydraulic cylinders in the prior art, so that each hydraulic cylinder 18 can act more rapidly according to the control requirement. The oil way and the oil port on the oil distribution disc 17 can be correspondingly designed according to actual needs.
The oil supply operation of simultaneous and different amounts to the hydraulic cylinders 18 through one oil pump 16 can be realized through the coordination of the oil distribution disc 17 and the electromagnetic directional valves 20, so that diversified adjustment requirements are met, the number of the oil pumps 16 is reduced, and the requirement of narrow installation space of equipment is met while the equipment structure is simplified. The electromagnetic directional valve 20 can be adjusted more conveniently, and meanwhile, the corresponding speed of oil control is faster, so that the control precision of oil conveying quantity is improved, and the adjustment precision of the inclination angle of the guide disc 6 is improved.
The I-shaped bracket comprises a left annular supporting plate 21, a connecting sleeve 22 and a right annular supporting plate 23, wherein the connecting sleeve 22 is sleeved outside a driving shaft corresponding to the right position of the oil distribution disc 17, the left end outer side and the right end outer side of the connecting sleeve 22 are respectively fixedly provided with the left annular supporting plate 21 and the right annular supporting plate 23, the outer side walls of the left annular supporting plate 21 and the right annular supporting plate 23 are respectively fixedly arranged at the corresponding positions of the inner side walls of the cylindrical shell, at least three first U-shaped notches 24 with outward openings and left and right through holes are uniformly distributed on the left annular supporting plate 21 along the circumference, second U-shaped notches 25 with outward openings and left and right through holes are respectively arranged on the right annular supporting plate 23 at the positions of each first U-shaped notch 24, hydraulic cylinders 18 with the left ends positioned in the first U-shaped notches 24 are respectively arranged in each second U-shaped notch 25, the left ends of each hydraulic cylinder 18 are respectively fixedly arranged at the corresponding positions of the left end faces of the left annular supporting plate 21 through first U-shaped clamping blocks 26, and the right ends of each hydraulic cylinder 18 are respectively fixedly arranged at the corresponding positions of the right end faces of the right annular supporting plate 23 through second U-shaped clamping blocks 27.
In the above technical solution, the first U-shaped clamping block 26 and the second U-shaped clamping block 27 are respectively provided with a left-right through U-shaped opening, one side of each hydraulic cylinder 18 close to the connecting sleeve 22 can be just limited by the bearing of the first U-shaped opening 24 and the second U-shaped opening 25, and one side far away from the connecting sleeve 22 can be just blocked by the U-shaped openings on the first U-shaped clamping block 26 and the second U-shaped clamping block 27, and the first U-shaped clamping block 26 and the second U-shaped clamping block 27 can be respectively welded on the corresponding positions of the left annular supporting plate 21 and the right annular supporting plate 23 through threaded fasteners or welding so as to completely and fixedly install each hydraulic cylinder 18 on the i-shaped bracket.
According to the requirements, the left annular supporting plate 21, the right annular supporting plate 23 and the connecting sleeve 22 can be integrally formed by machining, casting and the like in the prior art, and can also be fixed together by welding, gaps can be reserved among the oil tank 15, the oil distribution disc 17, the I-shaped bracket and the driving shaft or the self-lubricating bearings or the shaft sleeves can be correspondingly arranged in order to avoid the connecting sleeve 22 from influencing the rotation of the driving shaft, and ball spring plungers can be fixedly arranged in the middle of the right end of the piston rod 55 of each hydraulic cylinder 18 in order to reduce friction between the piston rod 55 and the guide disc 6, wherein the ball spring plungers are in the prior art. In order to facilitate the installation and limit of the oil tank 15, the oil distribution disc 17 and the I-shaped bracket, three limit inner ring grooves with the inner diameters sequentially increased from left to right can be arranged in the cylindrical shell, the oil tank 15, the oil distribution disc 17 and the I-shaped bracket are respectively and fixedly installed in the corresponding limit inner ring grooves, and the fixed installation can be realized through threaded connection or interference connection in the prior art.
In embodiment 4, as shown in fig. 1 and 8, the inclination adjusting module further comprises an adjusting rod 28, balls 29 and a limiting end cover 53, wherein the right end of a piston rod 55 of each hydraulic cylinder 18 is fixedly provided with the adjusting rod 28, the right end of the adjusting rod 28 is propped against the corresponding position on the left side of the guide disc 6, the outer side of the right end of the adjusting rod 28 is fixedly provided with the limiting end cover 53 with a left opening, the middle part of the right end surface of the adjusting rod 28 is provided with a hemispherical hole with a right opening and a left large right small, the middle part of the limiting end cover 53 is provided with a hemispherical hole which is penetrated left and right, the ball 29 with the left end positioned in the hemispherical groove is arranged in the hemispherical hole, and the right end of the ball 29 is exposed out of the limiting end cover 53 and propped against the corresponding position on the left side of the guide disc 6.
By this arrangement, the adjustment rod 28 can avoid the customization of the hydraulic cylinder due to the extension of the piston rod, so that the same function can be realized by a conventional standard hydraulic cylinder, and the adapter plate 11 can be arranged between the adjustment rod 28 and the right end of the piston rod 55 of each hydraulic cylinder 18, so that the position of the contact point between the adjustment rod 28 and the guide disc 6 can be changed, such as outward movement or inward movement, and the axis of each adjustment rod 28 still needs to be ensured to be parallel to the axis of the driving shaft.
The ball 29 changes the sliding friction between the adjusting rod 28 and the guide disc 6 into rolling friction, so that the friction force is greatly reduced, the abrasion is greatly reduced, the service life is prolonged, and meanwhile, the resistance of the guide disc 6 to the right end of the piston rod 55 can be reduced, so that the tilting speed of the guide disc 6 is higher. In addition, the abrasion of the ball 29 and the guide disk 6 is reduced, the influence on the inclination regulation precision of the guide disk 6 due to excessive abrasion can be reduced, and the regulation precision of the bending angle of the driven shaft 3 is ensured.
Embodiment 5 As shown in figures 1, 6 and 7, the driving shaft comprises a main shaft 30 and a reducer pipe 31 which are hollow in the axial direction, the outer side of the left part of the main shaft 30 and the inner side of the supporting inner annular table 4 are rotatably installed together through a bearing 32, the right end of the main shaft 30 and the left end of the reducer pipe 31 are fixedly installed together, the outer diameter from the middle part of the reducer pipe 31 to the right end is gradually contracted and reduced, and the right end of the reducer pipe 31 is fixedly communicated with the left end of the driven shaft 3 through a universal adapter.
In the above technical solution, the bearing 32 can make the support between the cylindrical housing and the driving shaft more stable, and can make the driving shaft rotate more smoothly, reduce the rotation resistance, and make the motion state between the cylindrical housing and the driving shaft more independent. The shaft shoulder can be formed between the left end of the reducer 31 and the main shaft 30, so that the ball head 7 is more convenient to install and limit, drilling fluid is better conveyed into the second flow passage, the flow speed of the drilling fluid is improved, and the drilling fluid can be better sprayed out of the drill bit.
In embodiment 6, as shown in fig. 1, 4, 5 and 7, the universal joint part comprises a sealing compression ring 33, a first sealing ring 34, an annular clamping piece 35, a second sealing ring 36, a corrugated disc 37 and an elastic sleeve 38, wherein the sealing compression ring 33 is fixedly arranged on the inner side of the left end of the driven shaft 3 through threads, a limiting inner ring table 39 is arranged on the inner side of the driven shaft 3 corresponding to the right position of the sealing compression ring 33, the first sealing ring 34, the annular clamping piece 35 and the second sealing ring 36 are sequentially arranged in the driven shaft 3 corresponding to the position between the limiting inner ring table 39 and the sealing compression ring 33 from left to right, an inner annular groove is arranged on the inner side of the annular clamping piece 35, an elastic corrugated disc 37 is arranged in the inner annular groove arranged in the corrugated disc 37, a through liquid passing hole is formed in the middle of the corrugated disc 37, the elastic sleeve 38 with the left end positioned on the left side of the driven shaft 3 is fixedly arranged on the inner side of the left side of the elastic sleeve 38 and the outer side of the right end of the driving shaft, a left annular bulge 40 protruding leftwards is arranged on the corrugated disc 37 adjacent to the side of the corrugated disc 37, and a right annular bulge 41 protruding rightwards is arranged on the corrugated disc 37 adjacent to the side of the corrugated disc 35.
In the above technical solution, the elastic sleeve 38 and the corrugated disc 37 may be integrally formed, and both may be made of rubber materials, and the left annular protrusion 40 and the right annular protrusion 41 may form a set of peaks and valleys, which may reserve enough expansion space for deformation of the corrugated disc 37, and in this embodiment, only one set may be provided, and multiple sets may also be provided in a specific implementation process.
The annular clamping piece 35 can be made of metal or hard plastic, an inner annular groove of the corrugated disc 37 arranged on the annular clamping piece can just clamp the outer edge of the corrugated disc 37, a telescopic space is reserved for deformation of the corrugated disc 37, and the annular clamping piece 35 can strengthen the structural strength and rigidity of the edge area of the corrugated disc 37 and avoid deformation in the rotation adjustment process of the driven shaft 3.
In addition, in this embodiment, the inner side of the left part of the elastic sleeve 38 can be fixedly installed with the outer side of the right end of the reducer pipe 31, and the inner diameter of the elastic sleeve 38 is smaller than the outer diameter of the right end of the reducer pipe 31, so that the elastic sleeve 38 can be better sleeved on the outer side of the right end of the reducer pipe 31 after being deformed, and the two can be effectively prevented from being separated.
By this arrangement, when the driven shaft 3 is inclined in any direction, the passage between the driving shaft and the driven shaft 3 can be always maintained in a communicating state by the elastic deformation and expansion and contraction of the bellows disc 37, and the normal flow of the drilling fluid is ensured. Meanwhile, a large number of connecting bolts between the driving shaft and the driven shaft 3 can be effectively avoided, the structure of the universal joint part is greatly simplified, and the tightness is improved.
Embodiment 7 As shown in fig. 1, the device further comprises an inclination sensor 42, and the inclination sensor 42 for detecting the inclination angle of the guide disc 6 is fixedly arranged at the upper left part of the guide disc 6.
By this arrangement, the inclination sensor 42 can effectively monitor the inclination angle of the guide disk 6, thereby providing basic data for the angle adjustment of the driven shaft 3.
In the embodiment 8, as shown in fig. 1, the universal supporting part comprises a self-lubricating radial spherical plain bearing 43 and a bearing pressing ring 44, the inner side of the right part of the cylindrical shell is fixedly arranged with the outer side of the outer ring of the self-lubricating radial spherical plain bearing 43, the inner side of the inner ring of the self-lubricating radial spherical plain bearing 43 is fixedly arranged with the outer side of the middle part of the sleeve 5, a stop inner ring table 45 is arranged on the inner side of the cylindrical shell corresponding to the left end position of the self-lubricating radial spherical plain bearing 43, the right end of the stop inner ring table 45 is propped against the left end of the self-lubricating radial spherical plain bearing 43, the inner side of the right end of the cylindrical shell is fixedly provided with a bearing pressing ring 44 of which the left end is propped against the right end of the self-lubricating radial spherical plain bearing 43, the inner diameter of the bearing pressing ring 44 is larger than the outer diameter of the sleeve 5, and the inner side of the right part of the bearing pressing ring 44 is provided with a conical groove 46 in a left small right large shape.
When in use, the self-lubricating radial spherical plain bearing 43 is the prior art, can be purchased directly, greatly reduces design cost and processing cost, has good interchangeability, and is more convenient for maintenance of the universal supporting part.
In embodiment 9, as shown in fig. 1, rolling bearings 47 are provided between the inside of the driving part and the outside of the driving shaft, between the inside of the left and right ends of the I-shaped bracket and the corresponding position of the outside of the driving shaft, and between the inside of the sleeve 5 and the outside of the driven shaft 3.
By this arrangement, the supporting point for the driving shaft can be increased, the vibration of the driving shaft can be reduced, the rotation of the driving shaft and the driven shaft 3 can be more stable, and the motion states of the driving part, the I-shaped bracket and the sleeve 5 can not be influenced.
In the embodiment 10, as shown in fig. 1, the cylindrical shell comprises 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 mounted together through threads, a plurality of outwards opened threaded holes are uniformly distributed on the right end of the left cylindrical shell 48 along the circumference, limiting holes are formed in the right cylindrical shell 49 corresponding to the positions of each threaded hole, and a set screw with the inner end positioned in the threaded hole is arranged in each limiting hole.
By the arrangement, the installation and maintenance of all parts in the cylindrical shell are more convenient.
Example 11 As shown in FIG. 10, a method for adjusting a rotary steerable device in a downhole of oil production, comprising:
S1, acquiring a target inclination angle and a target inclination direction which are required to be adjusted by the guide disk 6, and respectively calculating a target coordinate Z i of a Z axis of each contact point according to the target inclination angle and the target inclination direction, wherein i is the number of each linear actuating mechanism.
S2, detecting the expansion and contraction amount of the extending end of each linear actuator, calculating the actual inclination angle and the actual inclination direction of the current state of the guide disc 6, and determining the actual coordinate Z i' of the Z axis of each contact point in the current state, wherein i is the number of each linear actuator.
And S3, respectively calculating the expansion and contraction amount of the extending end of each linear actuating mechanism, namely a difference value delta Z i between the actual coordinate and the target coordinate of each contact point, wherein positive and negative values of the numerical values indicate directions, positive values indicate the extending directions, and negative values indicate the retracting directions.
And S4, respectively controlling the extending ends of the linear actuators to correspondingly extend and retract according to the extending amounts of the extending ends of the linear actuators, so that the inclination angle and the inclination direction of the guide disc 6 are adjusted to be the target inclination angle and the target inclination direction.
In the above technical solution, as shown in fig. 1, the coordinate system of the present invention is a drilling tool coordinate system oxyz, where the z-axis coincides with the axis of the driving shaft and points to the drilling direction.
Based on common knowledge, a surface can be determined by three points, in the invention, the right end of the extending end of each linear actuator is always propped against the corresponding position of the left end face of the guide disc 6, so the right end face of the extending end of each linear actuator is a contact point, the three contact points can form a contact surface, and the contact surface is overlapped with the left end face of the guide disc 6, so the inclination angle and the inclination direction of the left end face of the guide disc 6 can be positioned through the contact points.
In the invention, when the linear actuators are fixedly arranged in the cylindrical shell, the positions of the linear actuators are fixed relative to the cylindrical shell, the linear actuators cannot move in the up-down and front-back directions, and only the extending ends of the linear actuators can extend and retract left and right, that is, the coordinates of the right ends (contact points) of the extending ends of the linear actuators in the x-axis direction and the y-axis direction are always unchanged, and only the coordinates of the extending ends of the linear actuators in the z-axis direction are changed along with the extending and retracting of the extending ends of the linear actuators. Therefore, in the invention, the X-axis coordinate and the Y-axis coordinate are not required to be detected, and the three-dimensional coordinates (X, Y, Z) of each contact point can be obtained by detecting the Z-axis coordinate, namely the extension length or the retraction length of the extension end of each linear actuating mechanism, wherein the X and Y values are unchanged, and only the Z value is changed.
The position of the guide disc 6 can be rapidly determined through the three-dimensional coordinates of each contact point, and then the inclination angle and the inclination direction of the guide disc 6 are determined. In the use process, the middle part of the right end of the guide disc 6 is fixedly arranged together with the left end of the sleeve 5, and the driven shaft 3 is sleeved in the sleeve 5, so that the bending angle and the bending direction of the driven shaft 3 can be obtained through the inclination angle and the inclination direction of the guide disc 6.
In the above technical solution, the inclination angle of the guiding disc 6 can be determined by the inclination sensor 42, and can be back-pushed according to the measurement data of the measurement while drilling tool.
Compared with the prior art, the invention can control the guide disc 6 to incline according to any angle in the adjusting range by adjusting the extension length of the extending end of each linear actuating mechanism, and the inclined guide disc 6 can drive the driven shaft 3 to bend and adjust according to the preset angle and direction through the sleeve 5, thereby greatly simplifying the mechanical structure of the rotary guide device, improving the reliability and stability, and simplifying the control parameters and control program of the rotary guide device, and further effectively improving the response speed of the adjustment control.
The technical characteristics respectively form the embodiments of the invention, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (10)
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| CN202411909808.1A CN119352899A (en) | 2024-12-24 | 2024-12-24 | Downhole rotary guide device and adjustment method for oil production |
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| CN202411909808.1A CN119352899A (en) | 2024-12-24 | 2024-12-24 | Downhole rotary guide device and adjustment method for oil production |
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