Rotary guiding device for petroleum drilling

Abstract

The invention discloses a rotary guiding device for petroleum drilling, and belongs to the technical field of rotary guiding devices, the rotary guiding device comprises a fixed pipe, one side of the fixed pipe is rotatably connected with a rotary pipe, and the rotary guiding device further comprises a transmission mechanism rotatably connected in the fixed pipe and the rotary pipe. According to the drilling device, it is ensured that the drilling process can accurately respond to the direction control requirement by arranging the direction adjusting supporting assembly, meanwhile, flexible deflection of the drill bit in the three-dimensional space is achieved by arranging the direction adjusting ball, the adaptability under the complex geological condition is enhanced, and the drilling efficiency is improved. A self-adaptive flexible supporting system formed by a supporting column and a first spring can dynamically respond to the posture change of a transmission mechanism, and through a rigid locking mechanism of a clamping plate driven by a first electric push rod and a clamping groove, the self-adaptive flexible supporting system can be quickly converted into rigid supporting after adjustment in place; the flexibility of the adjusting stage is kept, the stability of the working state is ensured, vibration and impact are effectively absorbed, and a transmission mechanism is protected against instantaneous load damage.

Description

Technical Field

[0001] The present invention belongs to the technical field of rotary guide devices, and in particular relates to a rotary guide device for oil drilling. Background Art

[0002] Oil drilling is a complex and high-cost project. As oil and gas exploration and development extend to deep formations, complex structures and unconventional oil and gas reservoirs, the requirements for the accuracy and efficiency of wellbore trajectory control are becoming increasingly higher. It is usually necessary to use a rotary steering device to accurately guide and adjust the drill bit.

[0003] Document No. CN118167204A discloses a rotary guide device comprising a housing, a first drive device, a first transmission device, a drill bit, a second drive device, a plurality of plungers, and a plurality of flow guide devices. The housing is provided with a through inner cavity along its axial direction, the inner cavity having a first end and a second end, a plurality of grooves being defined at the second end of the housing inner cavity, and a plurality of flow channels being provided on the housing wall. The first drive device is provided at the first end of the housing inner cavity; the first transmission device is provided at the first end of the housing inner cavity; the drill bit is provided at the second end of the housing inner cavity; the second drive device is provided at the housing inner cavity, one end of the second drive device is fixed to the output end of the first transmission device, and the other end of the second drive device is connected to the drill bit. Each plunger fits into a corresponding groove; and each flow guide device is provided at one end of a corresponding flow channel. This application can solve the problem of wear of the outer wall of the drill bit caused by long-term friction with the hole wall in existing rotary guide devices. However, in actual use, the transmission mechanism will deform accordingly after being deflected and adjusted. If there is a lack of corresponding support, the service life of the transmission mechanism is easily shortened. Therefore, improvement is needed. Summary of the Invention

[0004] The purpose of the present invention is to propose a rotary guide device for oil drilling in order to solve the problem that the transmission mechanism will undergo corresponding deformation after being deflected and adjusted, and if there is a lack of corresponding support, it is easy to affect the service life of the transmission mechanism.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A rotary steering device for oil drilling, comprising a fixed pipe, one side of which is rotatably connected to a rotating pipe, and further comprising: A transmission mechanism is rotatably connected to the fixed tube and the rotating tube, and one end of the transmission mechanism is connected to the drill bit; The direction adjustment support assembly is arranged in the rotating tube and is used to adjust the deflection direction of the transmission mechanism; The stabilizing component is provided on the outer circumference of the fixed tube and is used to assist in adjusting the drilling direction of the drill bit and ensure the drilling stability of the drill bit by fitting with the inner wall of the drill hole; The vibration balancing component is arranged in the stabilizing component and reduces the instability of the drill bit during drilling due to the influence of the environment by generating reciprocating vibration.

[0006] As a further description of the above technical solution: The direction adjustment support assembly includes: A first eccentric wheel is disposed in the rotating tube, an outer peripheral side of the first eccentric wheel is connected to the inner wall of the rotating tube, and a first eccentric hole is opened on the first eccentric wheel; The second eccentric wheel is rotatably connected to the first eccentric hole. The second eccentric wheel is provided with a second eccentric hole. The transmission mechanism is rotatably connected to the second eccentric hole. The second eccentric wheel cooperates with the first eccentric wheel to adjust the relative position of the transmission mechanism. An external tube connected to the outer surface of the fixed tube, wherein the external tube and the fixed tube are located on the same axis; Multiple groups of support columns are distributed in a circular array, and each group of support columns is composed of multiple support columns distributed in a linear array. The support columns are slidably connected to the external tube and extend into the fixed tube to provide adaptive support for the transmission mechanism.

[0007] As a further description of the above technical solution: The direction adjustment support assembly also includes: The outer gear ring is connected to the outer peripheral side of the second eccentric wheel and is used to drive the second eccentric wheel to rotate and adjust its direction through transmission; The driving motor is fixedly mounted on one side of the inner wall of the fixed tube through a mounting plate and is used to drive the outer gear ring to rotate; The driving gear is connected to one end of the output shaft of the driving motor, and the driving gear is meshed with the outer gear ring.

[0008] As a further description of the above technical solution: Multiple snap-in plates are distributed in a circular array inside the outer tube. The support column is provided with multiple snap-in grooves along its length, and the snap-in plates can snap into the snap-in grooves at corresponding positions. Multiple fixing plates, the multiple fixing plates are distributed in a circular array within the external tube, the fixing plates are connected to the external tube and can be used to support and reinforce the external tube, one side of the fixing plates is connected to multiple first electric push rods distributed in a linear array, and the other ends of the multiple first electric push rods are connected to one side of the clamping plate; A fixed sliding rod and a sliding hole are provided on one side of the support column. The fixed sliding rod is slidably connected to the sliding hole. The other end of the fixed sliding rod is connected to one side of the inner wall of the external tube. A first spring is sleeved on the outer surface of the fixed sliding rod. The two ends of the first spring are respectively connected to one side of the inner wall of the external tube and one side of the support column.

[0009] As a further description of the above technical solution: The direction adjustment support assembly includes: Multiple adjustment support plates are distributed in a circular array on the outer circumference of the fixed tube. One side of the adjustment support plate is hinged with an articulated seat, and the articulated seat is connected to the outer surface of the fixed tube. One side of the adjustment support plate is designed with an inclined surface, and the inclined surface side is connected to a guide wheel. The adjustment support plate adjusts its posture to cooperate with the guide wheel to adapt to the inner wall of the drill hole; The sliding sleeve is provided with a sliding groove at the bottom of the adjustment support plate, the sliding sleeve is slidably connected in the sliding groove, the sliding groove is connected with a bottom sliding rod, and the sliding sleeve is slidably connected to the bottom sliding rod; A moving rod is hinged to the bottom of the sliding sleeve, one end of the moving rod extends into the interior of the fixed tube and is slidably connected to the fixed tube; A movable slide is slidably connected to the fixed tube, a push wheel is attached to one side of the movable slide, one side of the push wheel is connected to one end of the movable rod, and a push block is connected to one side of the movable slide, and the push block can drive the push wheel to move; The second spring is sleeved on the outer surface of the moving rod, and two ends of the second spring are respectively connected to one side of the driving wheel and one side of the inner wall of the fixed tube.

[0010] As a further description of the above technical solution: The direction adjustment support assembly also includes: Two connecting plates are arranged opposite to each other, both of which are connected to one side of the inner wall of the fixed tube, and the movable slide is slidably connected between the two connecting plates; A connecting slide rod is connected to one side of one of the connecting plates and is slidably connected to one side of the movable slide plate; The second electric push rod is connected to one side of the other connecting plate and to the other side of the moving slide plate.

[0011] As a further description of the above technical solution: The vibration balancing assembly comprises: A buffer block is provided in a cavity inside the adjustment support plate. The buffer block is arranged in the cavity and can rock back and forth in the cavity, balancing the external vibration of the drill bit through its own rocking; A limiting sliding rod is connected to the cavity and is slidably connected to the buffer block; The third spring is sleeved on the outer surface of the limiting slide rod, and two ends of the third spring are respectively connected to one side of the buffer block and one side of the inner wall of the cavity.

[0012] As a further description of the above technical solution: The vibration balancing assembly further comprises: Two connecting columns are distributed on one side of the buffer block in a mirror-symmetrical manner, and one side of the connecting column is connected to one side of the buffer block; The extrusion wheel is connected to one side of the connecting column.

[0013] As a further description of the above technical solution: The vibration balancing assembly further comprises: A fixed motor is fixedly mounted in the cavity through a mounting base to provide driving force; A rotating disk connected to one end of an output shaft of a fixed motor; Multiple extrusion blocks are distributed in a circular array on one side of the rotating disk. The cross-section of the extrusion blocks is trapezoidal. The extrusion blocks will periodically drive the extrusion wheel to move during the rotation process.

[0014] As a further description of the above technical solution: Also includes: A rotating device is rotatably connected to one side of the rotating tube and is used to drive the rotating tube to rotate. The rotating device is also provided with sensors and control elements for adaptively adjusting the direction of the rotating tube. The steering ball is arranged in the fixed tube and can rotate in multiple directions in the fixed tube. The transmission mechanism is connected to the center position of the steering ball.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, by setting a direction-adjusting support assembly and cooperating with the first eccentric wheel and the second eccentric wheel, the range of drill bit direction adjustment is significantly expanded and the adjustment accuracy is improved, ensuring that the drilling process can accurately respond to direction control requirements. At the same time, the setting of the direction-adjusting ball realizes the flexible deflection of the drill bit in three-dimensional space, and enhances the adaptability under complex geological conditions. The adaptive flexible support system composed of the support column and the first spring can dynamically respond to the posture changes of the transmission mechanism, and through the hard locking mechanism of the clamping plate and the clamping groove driven by the first electric push rod, it can be quickly converted into a rigid support after being adjusted into place, which not only maintains the flexibility of the adjustment stage but also ensures the stability of the working state, effectively absorbs vibration and impact, and protects the transmission mechanism from damage by instantaneous load.

[0016] 2. In the present invention, by setting a stabilizing component and controlling the stroke of the movable slide and the pushing block through the second electric push rod, flexible adjustment of the deployment range of the directional support plate is achieved, ensuring the adaptability of drilling holes with different inclinations. Multiple directional support plates can be deployed independently or synchronously, enhancing the drilling flexibility under complex geological conditions. The directional support plate drives the guide wheel to fit closely with the inner wall of the drill hole, effectively suppressing lateral vibration and deviation during the drilling process, greatly improving the stability of the drill bit, achieving a dynamic balance between the drilling angle and the supporting force, and extending the service life of the drill bit.

[0017] 3. In the present invention, by setting a vibration balancing component, the buffer block reciprocates on the limiting slide rod, thereby forming a circular array vibration field on the outer peripheral side of the fixed tube, effectively balancing the vibration of the drill bit caused by external influences, significantly improving the stability of the drill bit during drilling, ensuring drilling accuracy, and using mechanical vibration to offset external interference. Active vibration reduction can be achieved without a complex control system, reducing energy consumption and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention from another perspective; Figure 3 It is a partial cross-sectional structural schematic diagram of the present invention; Figure 4 A schematic diagram of the three-dimensional structure of the orientation adjustment support assembly of the present invention; Figure 5 A schematic diagram of a partial three-dimensional structure of the direction adjustment support assembly of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of part A; Figure 7 is a schematic diagram of the three-dimensional structure of the stabilizing assembly of the present invention; Figure 8 For the present invention Figure 7 The enlarged structural diagram of part B in the middle; Figure 9 It is a schematic diagram of a partial three-dimensional structure of the stabilizing assembly of the present invention; Figure 10 Schematic diagram of the three-dimensional structure of the vibration balancing assembly of the present invention; Figure 11 For the present invention Figure 10 Schematic diagram of the enlarged structure of part C in the middle.

[0019] Legend: 1. Rotating device; 2. Transmission mechanism; 3. Rotating tube; 4. Adjustment support assembly; 401. External tube; 402. First eccentric wheel; 403. Second eccentric wheel; 404. External gear ring; 405. Drive gear; 406. Drive motor; 407. Support column; 408. Snap-fit ​​groove; 409. Fixing plate; 410. First electric push rod; 411. Snap-fit ​​plate; 412. First spring; 413. Fixed slide bar; 5. Fixed tube; 6. Stabilizing assembly; 601. Adjustment support plate; 602. Guide wheel; 603 , moving slide; 604, connecting slide; 605, second electric push rod; 606, connecting plate; 607, pushing block; 608, moving rod; 609, second spring; 610, pushing wheel; 611, bottom slide; 612, sliding sleeve; 613, articulated seat; 7, drill bit; 8, steering ball; 9, vibration balancing assembly; 901, fixed motor; 902, rotating disk; 903, extrusion block; 904, extrusion wheel; 905, connecting column; 906, buffer block; 907, third spring; 908, limiting slide. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] See also Figures 1-11 , the present invention provides a technical solution: A rotary steering device for oil drilling, comprising a fixed pipe 5, one side of which is rotatably connected to a rotating pipe 3, and further comprising: The transmission mechanism 2 is rotatably connected to the fixed tube 5 and the rotating tube 3, and one end of the transmission mechanism 2 is connected to the drill bit 7; The direction adjustment support assembly 4 is arranged in the rotating tube 3 and is used to adjust the deflection direction of the transmission mechanism 2; The stabilizing assembly 6 is provided on the outer peripheral side of the fixed tube 5 and is used to assist in adjusting the drilling direction of the drill bit 7 and ensure the drilling stability of the drill bit 7 by fitting with the inner wall of the drill hole; The vibration balancing assembly 9 is arranged in the stabilizing assembly 6 and reduces the instability of the drill bit 7 during drilling due to the influence of the environment by generating reciprocating vibrations; The rotating device 1 is rotatably connected to one side of the rotating tube 3 and is used to drive the rotating tube 3 to rotate. The rotating device 1 is also provided with sensors and control elements for adaptively adjusting the direction of the rotating tube 3. The steering ball 8 is disposed in the fixed tube 5 and can rotate in multiple directions in the fixed tube 5 . The transmission mechanism 2 is connected to the center position of the steering ball 8 .

[0022] The adjustment support assembly 4 includes: The first eccentric wheel 402 is disposed in the rotating tube 3. The outer periphery of the first eccentric wheel 402 is connected to the inner wall of the rotating tube 3. The first eccentric wheel 402 is provided with a first eccentric hole. The second eccentric wheel 403 is rotatably connected to the first eccentric hole. The second eccentric wheel 403 is provided with a second eccentric hole. The transmission mechanism 2 is rotatably connected to the second eccentric hole. The second eccentric wheel 403 cooperates with the first eccentric wheel 402 to adjust the relative position of the transmission mechanism 2. The external tube 401 is connected to the outer surface of the fixed tube 5, and the axis of the external tube 401 and the axis of the fixed tube 5 are located on the same axis; Multiple groups of support columns 407, each group of support columns 407 is composed of multiple support columns 407 distributed in a linear array, and the support columns 407 are slidably connected to the outer tube 401 and extend into the fixed tube 5 to provide adaptive support for the transmission mechanism 2; The outer gear ring 404 is connected to the outer periphery of the second eccentric wheel 403 and is used to drive the second eccentric wheel 403 to rotate and adjust its direction through transmission; The driving motor 406 is fixedly mounted on one side of the inner wall of the fixed tube 5 through a mounting plate, and is used to drive the outer gear ring 404 to rotate; The driving gear 405 is connected to one end of the output shaft of the driving motor 406, and the driving gear 405 is meshed with the outer gear ring 404; Multiple snap-in plates 411 are distributed in a circular array within the outer tube 401. The support column 407 has multiple snap-in grooves 408 along its length, and the snap-in plates 411 can snap into the snap-in grooves 408 at corresponding positions. Multiple fixing plates 409 are distributed in a circular array within the outer tube 401. The fixing plates 409 are connected to the outer tube 401 and can be used to support and reinforce the outer tube 401. One side of the fixing plates 409 is connected to multiple first electric push rods 410 distributed in a linear array. The other ends of the multiple first electric push rods 410 are connected to one side of the clamping plate 411. A fixed slide rod 413 and a sliding hole are provided on one side of the support column 407. The fixed slide rod 413 is slidably connected to the sliding hole. The other end of the fixed slide rod 413 is connected to one side of the inner wall of the external tube 401. A first spring 412 is sleeved on the outer surface of the fixed slide rod 413. The two ends of the first spring 412 are respectively connected to one side of the inner wall of the external tube 401 and one side of the support column 407.

[0023] The specific implementation method is as follows: the transmission mechanism 2 drives the first eccentric wheel 402 to rotate through the rotating device 1, and the driving motor 406 drives the driving gear 405 to mesh with the outer gear ring 404, so that the second eccentric wheel 403 rotates synchronously. The phase difference between the two produces a compound eccentric motion, which pushes the transmission mechanism 2 to deflect in space under the support of the adjustment ball 8, so as to achieve precise adjustment of the drilling direction of the drill bit 7. During the deflection process of the transmission mechanism 2, its outer surface squeezes the circumferentially distributed support columns 407, so that each support column 407 adaptively retracts or extends according to the contact pressure, and cooperates with the supporting force of the first spring 412 to form a flexible and stable state. After the drill bit 7 is adjusted to the target direction, the first electric push rod 410 pushes the clamping plate 411 to embed into the end of the support column 407. The clamping groove 408 converts the elastic support into a rigid fixation. At this time, the first eccentric wheel 402 and the second eccentric wheel 403 both stop rotating and lock the phase. The transmission mechanism 2 maintains a stable posture under multi-point rigid support. When the direction needs to be adjusted again, the first electric push rod 410 retracts to release the clamping constraint, and the support column 407 returns to a flexible state. The rotating device 1 and the drive motor 406 re-coordinate the movement of the first eccentric wheel 402 and the second eccentric wheel 403, so that the transmission mechanism 2 continues to deflect under a new round of flexible support until the new target direction is reached and the locking process is repeated. This cycle realizes the alternating control of dynamic direction adjustment and rigid fixation during drilling, ensuring that the drill bit 7 can both flexibly turn and withstand drilling loads in complex formations.

[0024] The adjustment support assembly 4 includes: Multiple adjustment support plates 601 are distributed in a circular array on the outer circumference of the fixed tube 5. One side of the adjustment support plate 601 is hinged with an articulated seat 613, which is connected to the outer surface of the fixed tube 5. One side of the adjustment support plate 601 is designed with an inclined surface, and the inclined side is connected to the guide wheel 602. The adjustment support plate 601 adjusts its posture to cooperate with the guide wheel 602 to adapt to the inner wall of the drill hole; The sliding sleeve 612 is provided with a sliding groove at the bottom of the adjustment support plate 601, and the sliding sleeve 612 is slidably connected in the sliding groove, and the sliding groove is connected to the bottom sliding rod 611, and the sliding sleeve 612 is slidably connected to the bottom sliding rod 611; The movable rod 608 is hinged to the bottom of the sliding sleeve 612, and one end of the movable rod 608 extends into the interior of the fixed tube 5 and is slidably connected to the fixed tube 5; The movable slide 603 is slidably connected to the fixed tube 5. A driving wheel 610 is attached to one side of the movable slide 603. One side of the driving wheel 610 is connected to one end of the movable rod 608. A driving block 607 is connected to one side of the movable slide 603. The driving block 607 can drive the driving wheel 610 to move. The second spring 609 is sleeved on the outer surface of the moving rod 608, and the two ends of the second spring 609 are respectively connected to one side of the driving wheel 610 and one side of the inner wall of the fixed tube 5; Two connecting plates 606 are arranged opposite to each other, and both connecting plates 606 are connected to one side of the inner wall of the fixed tube 5. The movable slide 603 is slidably connected between the two connecting plates 606; A connecting slide bar 604 is connected to one side of one connecting plate 606 and is slidably connected to one side of the movable slide plate 603; The second electric push rod 605 is connected to one side of another connecting plate 606 and to the other side of the moving slide 603 .

[0025] The specific implementation method is as follows: after the second electric push rod 605 is started, it drives the moving slide 603 to move horizontally, driving the pushing block 607 to move synchronously, and the pushing block 607 contacts the pushing wheel 610 and applies lateral force, so that the pushing wheel 610 drives the moving rod 608 to move in a straight line, and the sliding sleeve 612 at the end of the moving rod 608 slides along the sliding groove, forcing the adjustment support plate 601 to deflect and expand, and its expansion amplitude is determined by the final displacement of the pushing block 607. When the drill bit 7 needs to adjust the inclination angle, a single or multiple adjustment support plates 601 are selected for coordinated action, and the corresponding pushing wheels 610 are differentially advanced according to different strokes, so that each adjustment support plate 601 is asymmetrically expanded, and the guide wheel 602 always presses the hole wall under the action of the spring preload, forming multi-point dynamic support, thereby realizing stable drilling and precise guidance of the drill bit 7 in the variable inclination hole section.

[0026] The vibration balancing assembly 9 comprises: The buffer block 906 is adjusted to open a cavity inside the support plate 601. The buffer block 906 is arranged in the cavity and can rock back and forth in the cavity to balance the external vibration of the drill bit 7 through its own rocking; The limiting slide bar 908 is connected to the cavity and is slidably connected to the buffer block 906; The third spring 907 is sleeved on the outer surface of the limiting slide rod 908, and the two ends of the third spring 907 are respectively connected to one side of the buffer block 906 and one side of the inner wall of the cavity; Two connecting posts 905 are distributed on one side of the buffer block 906 in a mirror-symmetrical manner, and one side of the connecting post 905 is connected to one side of the buffer block 906; The extrusion wheel 904 is connected to one side of the connecting column 905; The fixed motor 901 is fixedly mounted in the cavity through a mounting base to provide driving force; The rotating disk 902 is connected to one end of the output shaft of the fixed motor 901; A plurality of extrusion blocks 903 are distributed in a circular array on one side of the rotating disk 902 . The cross-section of the extrusion blocks 903 is trapezoidal. The extrusion blocks 903 periodically drive the extrusion wheel 904 to move during the rotation process.

[0027] The specific implementation method is as follows: after the fixed motor 901 is started, it drives the rotating disk 902 to rotate. The extrusion block 903 on the rotating disk 902 periodically contacts and applies pressure with the extrusion wheel 904 during the rotation process. After being subjected to force, the extrusion wheel 904 pushes the buffer block 906 to move along the limiting slide 908 through the connecting column 905. At the same time, the third spring 907 stores energy when the buffer block 906 is displaced and provides a rebound force after the extrusion block 903 is out of contact, so that the buffer block 906 forms a stable reciprocating motion on the limiting slide 908, thereby generating a uniformly distributed periodic vibration field on the outer peripheral side of the fixed tube 5. The vibration field is transmitted to the drill bit 7 through the fixed tube 5, offsetting the vibration interference caused by geological unevenness or external impact during drilling, and ensuring that the drill bit 7 maintains stable drilling under complex working conditions.

[0028] Working principle: When in use, the transmission mechanism 2 drives the drill bit 7 to drill underground. When the drilling direction needs to be adjusted, the rotating device 1 drives the first eccentric wheel 402 to rotate, and the driving motor 406 drives the driving gear 405 to rotate, the driving gear 405 drives the outer gear ring 404 to rotate, and the outer gear ring 404 drives the second eccentric wheel 403 to rotate. The first eccentric wheel 402 cooperates with the second eccentric wheel 403 to drive the transmission mechanism 2 to deflect, and cooperates with the direction-adjusting ball 8 to adjust the drilling direction of the drill bit 7 within a certain range, thereby achieving the adjustment of the drilling direction. The cooperation between the first eccentric wheel 402 and the second eccentric wheel 403 can make the transmission mechanism 2 deflect. The adjustable range of the transmission mechanism 2 is expanded, and the adjustment accuracy is higher. During the posture adjustment of the transmission mechanism 2, the transmission mechanism 2 will drive the support column 407 that is attached to its own surface to move, so that the corresponding support column 407 extends or retracts under the action of the first spring 412, thereby completing the adaptive flexible support of the transmission mechanism 2. Afterwards, the first electric push rod 410 starts to drive the clamping plate 411 to move, so that the clamping plate 411 and the clamping groove 408 are clamped with each other, thereby making the flexible support of the support column 407 become a rigid support. Through the rigid support at the point, the rigidity of the transmission mechanism 2 is guaranteed, and the damage of the transmission mechanism 2 is avoided.

[0029] During the drilling process, the second electric push rod 605 drives the moving slide 603 to move, so that the moving slide 603 drives the pushing block 607 to move, so that the pushing block 607 drives the pushing wheel 610 to move to one side, and the pushing wheel 610 drives the moving rod 608 to move, and the moving rod 608 drives the sliding sleeve 612 to move in the sliding groove, and makes the adjustment support plate 601 move to one side and expand. By controlling the moving stroke of the pushing block 607, the expansion range of the adjustment support plate 601 can be controlled. The independent or synchronous expansion of multiple adjustment support plates 601 can be suitable for drilling holes with different drilling inclinations, thereby assisting in adjusting the direction of the drill bit 7, and driving the guide wheel 602 to fit the inner wall of the drill hole through the adjustment support plate 601, thereby ensuring the stability of the drill bit 7 drilling.

[0030] In addition, during the drilling process, the fixed motor 901 is started, the fixed motor 901 drives the rotating disk 902 to rotate, the rotating disk 902 drives the extrusion block 903 to rotate, the extrusion block 903 can periodically squeeze and displace the extrusion wheel 904, and the extrusion wheel 904 drives the buffer block 906 to move through the connecting column 905, and the third spring 907 can drive the buffer block 906 to reset, so that the buffer block 906 can reciprocate in the length direction of the limiting slide rod 908, thereby forming a circular array vibration field on the outer peripheral side of the fixed tube 5, thereby balancing the vibration of the drill bit 7 caused by external influences and ensuring the drilling stability of the drill bit 7.

[0031] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A rotary guide device for oil drilling, comprising a fixed pipe (5), one side of which is rotatably connected to a rotary pipe (3), characterized in that: Also includes: A transmission mechanism (2) is rotatably connected to the fixed tube (5) and the rotating tube (3), and one end of the transmission mechanism (2) is rotatably connected to a drill bit (7); A direction adjustment support assembly (4) is arranged in the rotating tube (3) and is used to adjust the deflection direction of the transmission mechanism (2); A stabilizing component (6) is provided on the outer peripheral side of the fixed tube (5) and is used to assist in adjusting the drilling direction of the drill bit (7) and ensure the drilling stability of the drill bit (7) by fitting with the inner wall of the drill hole; The vibration balancing component (9) is arranged in the stabilizing component (6) and reduces the instability of the drill bit (7) during drilling due to environmental influences by generating reciprocating vibrations.

2. A rotary steering device for oil drilling according to claim 1, characterized in that: The direction adjustment support assembly (4) comprises: A first eccentric wheel (402) is disposed in the rotating tube (3), the outer peripheral side of the first eccentric wheel (402) is connected to the inner wall of the rotating tube (3), and a first eccentric hole is provided on the first eccentric wheel (402); The second eccentric wheel (403) is rotatably connected to the first eccentric hole. The second eccentric wheel (403) is provided with a second eccentric hole. The transmission mechanism (2) is rotatably connected to the second eccentric hole. The second eccentric wheel (403) cooperates with the first eccentric wheel (402) to adjust the relative position of the transmission mechanism (2). An external tube (401) is connected to the outer surface of the fixed tube (5), and the axis of the external tube (401) and the axis of the fixed tube (5) are located on the same axis; Multiple groups of support columns (407) are distributed in a circular array, and each group of support columns (407) is composed of multiple support columns (407) distributed in a linear array. The support columns (407) are slidably connected to the outer tube (401) and extend into the fixed tube (5) to provide adaptive support for the transmission mechanism (2).

3. A rotary steering device for oil drilling according to claim 2, characterized in that: The direction adjustment support assembly (4) further comprises: An outer gear ring (404) is connected to the outer peripheral side of the second eccentric wheel (403) and is used to drive the second eccentric wheel (403) to rotate and adjust its direction through transmission; A driving motor (406) is fixedly mounted on one side of the inner wall of the fixed tube (5) via a mounting plate, and is used to drive the outer gear ring (404) to rotate; The driving gear (405) is connected to one end of the output shaft of the driving motor (406), and the driving gear (405) is meshed with the outer gear ring (404).

4. A rotary steering device for oil drilling according to claim 2, characterized in that: The direction adjustment support assembly (4) further comprises: A plurality of snap-in plates (411), the plurality of snap-in plates (411) being distributed in a circumferential array within the outer tube (401), the support column (407) being provided with a plurality of snap-in grooves (408) along its length direction, the snap-in plates (411) being capable of snapping into the snap-in grooves (408) at corresponding positions; A plurality of fixing plates (409), the plurality of fixing plates (409) are distributed in a circumferential array within the external tube (401), the fixing plates (409) are connected to the external tube (401), and can be used to support and reinforce the external tube (401), one side of the fixing plates (409) is connected to a plurality of first electric push rods (410) distributed in a linear array, and the other ends of the plurality of first electric push rods (410) are connected to one side of the clamping plate (411); A fixed slide rod (413) and a slide hole are provided on one side of the support column (407). The fixed slide rod (413) is slidably connected to the slide hole. The other end of the fixed slide rod (413) is connected to one side of the inner wall of the external tube (401). A first spring (412) is sleeved on the outer surface of the fixed slide rod (413). The two ends of the first spring (412) are respectively connected to one side of the inner wall of the external tube (401) and one side of the support column (407).

5. The rotary guide device for oil drilling according to claim 1, characterized in that: The direction adjustment support assembly (4) comprises: A plurality of direction-adjusting support plates (601) are distributed in a circular array on the outer peripheral side of the fixed tube (5); one side of the direction-adjusting support plate (601) is hinged with a hinge seat (613); the hinge seat (613) is connected to the outer surface of the fixed tube (5); one side of the direction-adjusting support plate (601) is designed as an inclined surface; the inclined surface side is connected to a guide wheel (602); the direction-adjusting support plate (601) adjusts its own posture to cooperate with the guide wheel (602) to adapt to the inner wall of the drill hole; The sliding sleeve (612) is provided with a sliding groove at the bottom of the adjustment support plate (601), the sliding sleeve (612) is slidably connected in the sliding groove, the sliding groove is connected with a bottom sliding rod (611), and the sliding sleeve (612) is slidably connected to the bottom sliding rod (611); A movable rod (608) is hinged to the bottom of the sliding sleeve (612), and one end of the movable rod (608) extends into the interior of the fixed tube (5) and is slidably connected to the fixed tube (5); A movable slide (603) is slidably connected to the fixed tube (5); a driving wheel (610) is attached to one side of the movable slide (603); one side of the driving wheel (610) is connected to one end of a movable rod (608); a driving block (607) is connected to one side of the movable slide (603); and the driving block (607) can drive the driving wheel (610) to move; The second spring (609) is sleeved on the outer surface of the moving rod (608), and the two ends of the second spring (609) are respectively connected to one side of the driving wheel (610) and one side of the inner wall of the fixed tube (5).

6. A rotary guide device for oil drilling according to claim 5, characterized in that: The direction adjustment support assembly (4) further comprises: Two connecting plates (606) are arranged opposite to each other, both connecting plates (606) are connected to one side of the inner wall of the fixed tube (5), and the movable slide plate (603) is slidably connected between the two connecting plates (606); A connecting slide bar (604) is connected to one side of one of the connecting plates (606) and is slidably connected to one side of the movable slide plate (603); The second electric push rod (605) is connected to one side of the other connecting plate (606) and to the other side of the moving slide plate (603).

7. A rotary steering device for oil drilling according to claim 5, characterized in that: The vibration balancing component (9) comprises: A buffer block (906) is provided with a cavity inside the adjustment support plate (601), and the buffer block (906) is arranged in the cavity and can rock back and forth in the cavity, balancing the external vibration of the drill bit (7) through its own rocking; A limiting slide bar (908) is connected to the cavity and is slidably connected to the buffer block (906); The third spring (907) is sleeved on the outer surface of the limiting slide rod (908), and the two ends of the third spring (907) are respectively connected to one side of the buffer block (906) and one side of the inner wall of the cavity.

8. A rotary steering device for oil drilling according to claim 7, characterized in that: The vibration balancing component (9) further comprises: Two connecting posts (905) are distributed on one side of the buffer block (906) in a mirror-symmetrical manner, and one side of the connecting post (905) is connected to one side of the buffer block (906); The extrusion wheel (904) is connected to one side of the connecting column (905).

9. A rotary steering device for oil drilling according to claim 8, characterized in that: The vibration balancing component (9) further comprises: A fixed motor (901) is fixedly mounted in the cavity via a mounting base and is used to provide a driving force; A rotating disk (902) is connected to one end of an output shaft of a fixed motor (901); A plurality of extrusion blocks (903) are distributed in a circular array on one side of the rotating disk (902). The cross-section of the extrusion blocks (903) is trapezoidal. The extrusion blocks (903) periodically drive the extrusion wheel (904) to move during rotation.

10. The rotary steering device for oil drilling according to claim 1, characterized in that: Also includes: A rotating device (1) is rotatably connected to one side of the rotating tube (3) and is used to drive the rotating tube (3) to rotate. A sensor and a control element are also provided inside the rotating device (1) for adaptively adjusting the direction of the rotating tube (3). The steering ball (8) is arranged in the fixed tube (5) and can rotate in multiple directions in the fixed tube (5). The transmission mechanism (2) is connected to the center position of the steering ball (8).

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