A push-type rotary steering system

Abstract

The present invention relates to the field of drilling rotary guidance, and in particular to a push-type rotary guidance system, comprising a rotating cylinder and a drill bit installed at the lower end thereof, wherein a support cylinder is hingedly connected to the upper end of the rotating cylinder, an annular ring is arranged on the inner wall of the support cylinder, a main shaft is rotatably arranged in the annular ring, a connecting assembly is arranged at the bottom of the main shaft, and the main shaft is hinged to the rotating cylinder through the connecting assembly, when the main shaft rotates in the present invention, the inner gear ring also rotates accordingly, and drives the transmission cylinder to rotate through the transmission gear; the driving shaft in the transmission cylinder drives the driving gear to mesh with the swing gear under the cooperation of the structural plate and the structural groove, thereby realizing the rotation of the rotating shaft, and finally driving the drill bit to swing, so the present invention does not require external hydraulic equipment, reduces the complexity and volume of the system, and also reduces the cost and maintenance difficulty.

Description

Technical Field

[0001] The invention relates to the field of drilling rotary steering, and in particular to a push-type rotary steering system. Background Art

[0002] Push-to-guide rotary steering is an advanced drilling technology that installs retractable wing ribs (push-to-guide wings) close to the drill bit and uses a hydraulic system to control their extension and retraction, thereby providing lateral force to the drill bit during the rotation of the drill string, allowing the drill bit to change direction in real time in the wellbore, thereby achieving precise wellbore trajectory control. This technology allows the drill bit to be guided while rotating, overcoming the shortcoming of traditional sliding steering tools that are difficult to control direction during rotation. It has the characteristics of high precision, high efficiency and strong adaptability, and is suitable for complex three-dimensional wellbore trajectories, such as large-reach wells, horizontal wells and high-angle wells.

[0003] The drill bit and drill rod of the existing drilling device are hinged, and an additional driving device is usually arranged at the hinge point to drive the drill bit to deflect along the hinge point. However, since the drill bit itself is heavy and the drill bit continues to drill the hole wall during rotation, the torque applied to the driving device is too large. When the drill bit encounters a hard rock layer or the driving device has been used for a long time, the driving device is very likely to be damaged, resulting in a slowdown in the drilling progress.

[0004] In the prior art, for example, the patent with publication number CN107701107A discloses a static internal push-and-lean articulated high-inclination rate rotary steering tool and control method. The static internal push-and-lean articulated high-inclination rate rotary steering tool adopts a static internal push-and-lean articulated design, by articulating the non-rotating measurement and control body with the non-rotating actuator body instead of an integral structure; the drill bit is easy to bend in the wellbore, and the bending stress on the upper part of the steering tool is small, and the push force consumption for the bending deformation of the drill bit is minimized; at the same time, a hydraulic method is used instead of mud pressure difference to act on the piston to form a push force, thereby improving the push force. However, although this technology has improved some of the original problems, there are still aspects that need to be further optimized to better meet actual detection needs.

[0005] The wear-resistant ribs of the prior art are in contact with the well wall on only one side. Even if the wear-resistant ribs are made of high-strength materials, their surfaces will be damaged after long-term one-sided contact and need to be replaced. The production cost of the wear-resistant ribs is high, so the overall cost is high.

[0006] Secondly, the device needs to drive the drill bit to swing through a hydraulic system, and the hydraulic system requires three sets of independent motor pump hydraulic modules to work. These devices need to be integrated inside the above device, which has a complex structure and the hydraulic system is prone to failure, resulting in risks. In addition, when the drill bit of the above device is swinging and drilling, there is no supporting auxiliary device to support the drill bit hinge point, which makes the drill bit prone to vibration during movement, resulting in structural failure.

[0007] Therefore, based on the above-stated viewpoints, there is still room for improvement in the existing rotary guide devices. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a push-type rotary guide system, including a rotating cylinder and a drill bit installed at the lower end thereof, the upper end of the rotating cylinder is hinged with a supporting cylinder, the inner wall of the supporting cylinder is provided with an annular ring, a main shaft is rotatably arranged in the annular ring, a connecting assembly is provided at the bottom of the main shaft, and the main shaft is hinged to the rotating cylinder through the connecting assembly.

[0009] The connecting assembly comprises a mounting groove opened on the top of the rotating cylinder, a mounting plate is installed in the mounting groove by bolt fixing, and the bottom of the main shaft is connected to the mounting plate by universal joint transmission.

[0010] Preferably, a rotating circle is rotatably arranged on the upper end of the mounting plate, a conical plate is symmetrically arranged on the upper end of the rotating circle, a rotating shaft is arranged in the middle of the conical plate, and both sides of the rotating shaft are rotatably connected to the inner wall of the supporting tube, and a swinging groove is symmetrically opened on the outer side of the supporting tube.

[0011] Preferably, a sealing rubber ring made of a flexible material is provided in the gap between the rotating cylinder and the supporting cylinder, and a sealing rubber ring is also provided in the swinging groove, and the bottom of the sealing rubber ring is rotatably connected to the upper side of the rotating cylinder.

[0012] Preferably, a driving unit for driving the rotating shaft to rotate is also provided on the outside of the rotating shaft, and the driving unit includes swing gears sleeved on both sides of the rotating shaft, an annular cavity is opened in the annular ring, an inner gear ring located in the annular cavity is sleeved on the outside of the main shaft, and a transmission cylinder is rotatably penetrated on the lower side of the annular ring, and the transmission cylinder is located on one side of the annular cavity and sleeved with a transmission gear meshing with the inner gear ring.

[0013] Preferably, a driving shaft is slidably arranged in the transmission cylinder, and a driving gear is sleeved on one end of the driving shaft located outside the transmission cylinder, and the driving gear on one side is meshed with the adjacent swing gear.

[0014] Preferably, the levels of the two drive shafts are inconsistent.

[0015] Preferably, the inner wall of the transmission cylinder is provided with several structural plates distributed along its axis, and the gap between the structural plates is a structural groove, and a matching plate corresponding to the structural groove is provided on the outer side of the drive shaft, and the matching plate on the outer side of the drive shaft with a lower horizontal height on one side is located in the structural groove.

[0016] Preferably, a driving assembly for driving the driving shaft to move up and down is arranged inside the support tube, and the driving assembly includes a support plate arranged on the inner wall of the support tube, a horizontal plate is arranged at the end of the support plate, three rectangular grooves are opened on the horizontal plate, and horizontal shafts are rotatably inserted in the rectangular grooves on both sides, and a toggle gear located in the corresponding rectangular groove is sleeved on the outer side of the horizontal shaft.

[0017] Preferably, the outer side of the driving shaft is provided with a plurality of toggle grooves evenly distributed along its extended section, and the two toggle gears are respectively meshed with the toggle grooves on the outer side of the corresponding driving shaft.

[0018] Preferably, the two transverse axes extend into the rectangular groove in the middle and are connected by gear transmission.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. When the main shaft in the present invention rotates, the inner gear ring also rotates, and drives the transmission cylinder to rotate through the transmission gear; the driving shaft in the transmission cylinder drives the driving gear to engage with the swing gear under the cooperation of the structural plate and the structural groove, thereby realizing the rotation of the rotating shaft, and finally drives the drill bit to swing. Therefore, the present invention does not require external hydraulic equipment, reduces the complexity and volume of the system, and also reduces the cost and maintenance difficulty.

[0021] 2. During the drilling process of the drill bit, the clamping plate on the bending plate of the present invention contacts the plane outside the rotating shaft to limit the rotation direction of the rotating shaft, thereby preventing the rotating shaft from excessively rotating and causing the drill bit to deviate in the direction of travel, ensuring the stability of the drill bit drilling angle and improving the drilling accuracy at the same time; further, when it is necessary to adjust the drill bit swing angle, the driving gear descends, the active arc plate contacts the passive arc plate, driving the bending plate to move, so that the clamping plate is separated from the plane, allowing the rotating shaft to rotate to adjust the drill bit swing angle, and after the driving gear rises, the bending plate returns to the initial position under the action of the reset tension spring, and continues to limit the rotating shaft in sections to ensure that the drill bit angle remains stable during the drilling process.

[0022] 3. When the rotating cylinder in the present invention swings, the bending plate also moves, and the ratchet teeth are driven to rotate by the toggle key; the ratchet teeth drive the contact circle to rotate through the sliding key, so that the outer side of the contact circle is evenly in contact with the well wall, avoiding angle deviation between the support cylinder and the well wall, which causes unilateral wear of the contact circle; and after the angle adjustment of the rotating cylinder is completed, the bending plate returns to the initial position and continues to limit the rotating shaft; during the movement of the bending plate, the ratchet teeth will continue to be toggled by the toggle key, but due to the one-way transmission characteristics of the ratchet teeth, the ratchet teeth will not drive the contact circle to rotate in the opposite direction at this time. When the bending plate moves again next time, the ratchet teeth will continue to drive the contact circle to rotate, so that the contact circle will continuously change the contact angle with the well wall, ensuring stable contact between the support cylinder and the well wall, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the main body structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the main body of the present invention.

[0026] Figure 3 It is a structural schematic diagram of the connection assembly of the present invention.

[0027] Figure 4 It is a structural schematic diagram of the drive unit of the present invention.

[0028] Figure 5 It is a schematic cross-sectional structure diagram of the drive unit of the present invention.

[0029] Figure 6 The present invention Figure 5 A partial enlarged view of the structure at point A.

[0030] Figure 7 The present invention Figure 5 A magnified view of part of the structure at point B.

[0031] Figure 8 It is a schematic plan cross-sectional view of the drive unit of the present invention.

[0032] Fig. 9 It is a schematic diagram of the structure of the drive assembly of the present invention.

[0033] Fig.10 The present invention Fig. 9 A magnified view of part of the structure at point C in the middle.

[0034] Fig.11 The present invention Fig. 9 A magnified view of part of the structure at D in the middle.

[0035] Fig.12 It is a structural schematic diagram of the limiting component of the present invention.

[0036] Fig.13 The present invention Fig.12 A magnified view of part of the structure at E in the middle.

[0037] Fig.14 The present invention Fig.12 A magnified view of part of the structure at F in the middle.

[0038] Fig.15 It is a schematic diagram of the structure of the stabilizing assembly of the present invention.

[0039] Fig.16 It is a cross-sectional schematic diagram of the stabilizing assembly of the present invention.

[0040] Fig.17 It is a cross-sectional view from another perspective of the stabilizing assembly of the present invention.

[0041] Fig.18 The present invention Fig.17 A partial enlarged view of the structure at G in the middle.

[0042] In the figure, 1, rotating cylinder; 10, drill bit; 11, supporting cylinder; 12, annular ring; 13, main shaft; 2, connecting assembly; 20, mounting groove; 21, mounting plate; 22, rotating ring; 23, conical plate; 24, rotating shaft; 25, swing groove; 26, sealing rubber ring; 3, driving unit; 30, swing gear; 31, inner gear ring; 32, transmission cylinder; 33, transmission gear; 34, driving shaft; 35, driving gear; 36, structural plate; 37, structural groove; 38, matching plate; 4, driving unit Moving assembly; 40, supporting plate; 41, horizontal plate; 42, rectangular groove; 43, horizontal axis; 44, toggle gear; 45, toggle groove; 5, limiting assembly; 50, bending plate; 51, connecting plate; 52, plane; 53, clamping plate; 54, passive arc plate; 55, active arc plate; 56, limiting groove; 57, limiting plate; 58, reset spring; 6, stabilizing assembly; 60, limiting cylinder; 61, contact ring; 62, receiving groove; 63, driving key; 64, ratchet teeth; 65, toggle key. DETAILED DESCRIPTION

[0043] The following combination Figures 1 to 18 Embodiments of the present invention are described in detail.

[0044] The embodiment of the present application discloses a push-type rotary guide system, which explains that the present application is mainly used in the process of controlling the angle swing of the drill bit during the drilling process. In terms of technical effect, the support end and the rotating end are hinged to each other, and the rotating end can also drive the drill bit to rotate at the lower end of the support end through the hinge point to perform drilling work. The internally arranged driving device can drive the rotating end to drive the drill bit to swing synchronously along its hinge point to adjust the drilling angle. Furthermore, the hinge point can be limited by an internal limiting device, so that the angle of the drill bit can remain stable during the drilling process, further improving the applicability of the present invention.

[0045] Example 1: Reference Figure 1 and Figure 2 As shown, it includes a rotating cylinder 1, a drill bit 10, a supporting cylinder 11, an annular ring 12, a main shaft 13 and a connecting component 2. The drill bit 10 is installed at the lower end of the rotating cylinder 1, and the supporting cylinder 11 is hinged at the upper end of the rotating cylinder 1. An annular ring 12 is arranged on the inner wall of the supporting cylinder 11. The main shaft 13 is rotatably arranged in the annular ring 12. The connecting component 2 is arranged at the bottom of the main shaft 13, and is hinged to the rotating cylinder 1 through the connecting component 2.

[0046] That is, the main shaft 13 can be driven by an external driving device and can rotate under the limit of the annular ring 12. During the rotation of the main shaft 13, the rotating cylinder 1 can be driven to rotate through the connecting component 2, so that the rotating cylinder 1 can drive the drill bit 10 to rotate synchronously to perform the drilling task. The rotating cylinder 1 can also swing along its hinge point to change the angle between the drill bit 10 and the support cylinder 11, thereby changing the drilling angle.

[0047] The propulsion end of the guide system is between the drill bit 10 and the rotating cylinder 1 for drilling work, and the support cylinder 11 is the support expansion end for mutual expansion connection with the external drill rod, so that the device can perform long-depth drilling tasks.

[0048] Continue to refer to Figure 2 and Figure 3 As shown, the connecting assembly 2 is used to connect the rotating cylinder 1 and the supporting cylinder 11; specifically, the connecting assembly 2 includes a mounting groove 20, a mounting plate 21, a rotating circle 22, a conical plate 23, a rotating shaft 24, a swinging groove 25 and a sealing rubber ring 26. The mounting groove 20 is opened at the top of the rotating cylinder 1, and a mounting plate 21 is installed in the mounting groove 20 by bolt fixing. The bottom of the main shaft 13 is connected to the mounting plate 21 by a universal joint transmission, that is, the main shaft 13 can drive the rotating cylinder 1 to rotate through the mounting plate 21, and the rotating cylinder 1 can also swing along the universal joint connection point with the main shaft 13 when driven by external force to change the drilling angle of the drill bit 10.

[0049] A rotating circle 22 is rotatably provided on the upper end of the mounting plate 21, and a conical plate 23 is symmetrically provided on the upper end of the rotating circle 22. A rotating shaft 24 is provided in the middle of the conical plate 23, and both sides of the rotating shaft 24 are rotatably connected to the inner wall of the support tube 11. A swinging groove 25 is symmetrically provided on the outer side of the support tube 11, that is, the rotating shaft 24 can drive the corresponding rotating circle 22 to swing through the conical plate 23 under the limit of the support tube 11, and the rotating circle 22 can drive the rotating tube 1 to swing through the mounting plate 21 to change the deflection angle of the drill bit 10. When the rotating tube 1 rotates, since the rotating circle 22 is rotatably connected to the mounting plate 21, no interference will occur, and the swinging groove 25 expands the swinging angle range of the rotating tube 1.

[0050] A sealing rubber ring 26 made of a flexible material is commonly provided in the gap between the rotating cylinder 1 and the supporting cylinder 11, and a sealing rubber ring 26 is also provided in the swinging groove 25. The sealing rubber ring 26 is used to seal the gap between the rotating cylinder 1 and the supporting cylinder 11, and at the same time, the gap between the swinging groove 25 and the rotating cylinder 1 is also sealed to prevent mud and foreign matter from entering the supporting cylinder 11 and the rotating cylinder 1 from the gap. The bottom of the sealing rubber ring 26 is rotatably connected to the upper side of the rotating cylinder 1, that is, when the rotating cylinder 1 changes its angle, it can drive the sealing rubber ring 26 to extend and retract, and when the rotating cylinder 1 is rotating, it will not continue to drive the sealing rubber ring 26 to rotate, that is, the bottom of the sealing rubber ring 26 is inserted into the upper end of the rotating cylinder 1, and the rotating cylinder 1 can pull the sealing rubber ring 26, but cannot drive the sealing rubber ring 26 to rotate.

[0051] Reference Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a driving unit 3 for driving the rotating shaft 24 to rotate is arranged on the outer side of the rotating shaft 24; specifically, the driving unit 3 includes a swing gear 30, an inner gear ring 31, a transmission cylinder 32, a transmission gear 33, a driving shaft 34, a driving gear 35, a structural plate 36, a structural groove 37 and a matching plate 38. The two swing gears 30 are respectively sleeved on both sides of the rotating shaft 24, that is, the swing gear 30 can drive the rotating shaft 24 to rotate when driven by an external force, so as to indirectly drive the rotating cylinder 1 to swing.

[0052] An annular cavity is opened in the annular ring 12, and an inner gear ring 31 located in the annular cavity is sleeved on the outer side of the driving shaft 34, and a transmission cylinder 32 is rotatably penetrated on the lower side of the annular ring 12. The transmission cylinder 32 is located on one side of the annular cavity and is sleeved with a transmission gear 33 meshing with the inner gear ring 31. When the main shaft 13 rotates, the inner gear ring 31 can be driven to rotate synchronously, and the inner gear ring 31 can drive the transmission cylinder 32 to rotate synchronously under the limit of the annular ring 12 through the transmission gear 33. It should be noted that the support cylinder 11 will not rotate when the rotating cylinder 1 rotates.

[0053] A driving shaft 34 is slidably arranged inside the transmission cylinder 32. A driving gear 35 is sleeved on one end of the driving shaft 34 outside the transmission cylinder 32, and the driving gear 35 on one side is meshed with the adjacent swing gear 30. The horizontal heights of the two driving shafts 34 are inconsistent. When driven by external force, the driving shaft 34 can move up and down under the limit of the corresponding transmission cylinder 32, and the driving shaft 34 can also drive the driving gear 35 to rotate synchronously.

[0054] The inner wall of the transmission cylinder 32 is provided with several structural plates 36 distributed along its axis, and the gaps between the structural plates 36 are structural grooves 37. The outer side of the driving shaft 34 is provided with matching plates 38 corresponding to the structural grooves 37, and the matching plate 38 on the outer side of the driving shaft 34 with a lower horizontal height on one side is located in the structural groove 37.

[0055] That is, the transmission cylinder 32 can drive the corresponding driving shaft 34 to rotate through the structural plate 36, the structural groove 37 and the matching plate 38, and when the driving shaft 34 on one side is driven by an external force to drive the matching plate 38 to move into the structural groove 37, the driving shaft 34 drives the driving gear 35 to mesh with the swing gear 30 on one side, driving the rotating shaft 24 on one side to rotate forward, indirectly allowing the drill bit 10 to swing, and when the drill bit 10 needs to swing toward the other side, the driving shaft 34 drives the driving gear 35 to rise, and the driving shaft 30 on the other side is driven by the external force to drive the driving gear 35 to move upward ... 4 descends, synchronously driving the corresponding driving gear 35 to mesh with the adjacent swing gear 30. At this time, the matching plate 38 on the outer side thereof moves into the corresponding structural groove 37, so that the transmission cylinder 32 can indirectly drive the rotating shaft 24 to rotate in the opposite direction with the help of the rotational force of the main shaft 13, thereby indirectly driving the drill bit 10 to swing in the opposite direction. The drill bit 10 is driven to swing with the help of the rotational force of the main shaft 13, so that its swing torque is large enough to drive the drill bit 10 to have enough swing force to change the angle during drilling without the need for additional hydraulic driving equipment.

[0056] Reference Fig. 9 , Fig.10 and Fig.11As shown, a driving assembly 4 for driving the driving shaft 34 to move up and down is arranged inside the supporting tube 11; specifically, the driving assembly 4 includes a supporting plate 40, a transverse plate 41, a rectangular groove 42, a transverse shaft 43, a toggle gear 44 and a toggle groove 45, the supporting plate 40 is arranged on the inner wall of the supporting tube 11, and a transverse plate 41 is arranged at the end of the supporting plate 40, and the supporting plate 40 is used to support the transverse plate 41; three rectangular grooves 42 are opened on the transverse plate 41, and the rectangular grooves 42 on both sides are rotatably inserted with transverse shafts 43, and the outer side of the transverse shaft 43 is sleeved with a toggle gear 44 located in the corresponding rectangular groove 42, and the two transverse shafts 43 extend into the middle rectangular groove 42 and are connected by gear transmission, and the outer side of the driving shaft 34 is opened with a plurality of toggle grooves 45 evenly distributed along its extension section, and the two toggle gears 44 are respectively meshed with the toggle grooves 45 on the outer side of the corresponding driving shaft 34.

[0057] One end of the horizontal axis 43 on one side passes through the outer wall of the corresponding horizontal plate 41 for connection with an external drive motor. The horizontal axis 43 is driven to rotate by the external drive motor, so that the main shaft 13 can rotate the corresponding toggle gear 44, and the toggle gear 44 will drive the corresponding drive shaft 34 to move up and down through the toggle groove 45. The horizontal axis 43 on one side can drive the horizontal axis 43 on the other side to rotate in the opposite direction through gear transmission, that is, the rotation directions of the two toggle gears 44 are opposite.

[0058] At this time, the two drive shafts 34 can move up and down in opposite directions. When one drive shaft 34 drives the drive gear 35 to mesh with the swing gear 30, the drive shaft 34 on the other side will drive the corresponding drive gear 35 to rise and no longer mesh with the corresponding swing gear 30 to avoid interference. That is, the meshing directions of the two drive gears 35 and the corresponding swing gears 30 are inconsistent. Therefore, when the main shaft 13 rotates in only one direction, the corresponding drive gear 35 is meshed with the adjacent swing gear 30 through the forward and reverse control of the external drive motor to realize the change of the swing direction of the drill bit 10.

[0059] Example 2: Reference Fig.12 , Fig.13 and Fig.14As shown, on the basis of the first embodiment, in order to limit the rotating shaft 24 and indirectly make the angle of the drill bit 10 remain stable during drilling, a limiting component 5 is provided in the support tube 11; specifically, the limiting component 5 includes a bending plate 50, a connecting plate 51, a plane 52, a clamping plate 53, a passive arc plate 54, an active arc plate 55, a limiting groove 56, a limiting plate 57 and a reset spring 58, the sliding groove is symmetrically opened in the inner wall of the support tube 11, and the bending plate 50 is slidably arranged in the sliding groove, and the bending plates 50 are connected to each other by the connecting plate 51, and the outer side of the rotating shaft 24 is symmetrically provided with several planes 52 evenly distributed along its axis, and a clamping plate 53 corresponding to the plane 52 is provided on one side of the bending plate 50, and the clamping plate 53 is an elastic material with a memory shape effect, and the elastic material with a memory shape effect should be an elastic rubber product, which is subjected to a greater resistance than itself. When the force is applied, the two bending plates 50 will be deformed, and when the force is no longer applied, the two bending plates 50 will return to their original shapes. That is, the two bending plates 50 can synchronously reciprocate in the corresponding sliding grooves through the connecting plate 51. When the clamping plate 53 on the bending plate 50 moves to the plane 52 outside the rotating shaft 24, the rotation direction of the rotating shaft 24 can be limited by the plane 52, thereby indirectly preventing the hinge point of the rotating cylinder 1 of the main shaft 13 from shaking during drilling. When the rotating cylinder 1 is skewed and rotated, its hinge point, that is, the rotating shaft 24, will also undergo a certain degree of adaptive rotation. That is, at this time, the clamping plate 53 will be deformed under force, causing the rotating shaft 24 to rotate to a certain extent, until the clamping plate 53 contacts the next plane 52, thereby realizing the segment limit of the rotating shaft 24, thereby preventing the rotating shaft 24 from rotating greatly when it is not indirectly driven by the driving gear 35, resulting in the deviation of the travel direction of the drill bit 10.

[0060] A passive arc plate 54 is also provided on the upper side of the bending plate 50, and an active arc plate 55 is provided on the lower side of the corresponding driving gear 35, and the active arc plate 55 on one side is in contact with the corresponding passive arc plate 54, and the bending plate 50 on one side is provided with a limiting groove 56 on one side of the sliding groove, and a limiting plate 57 located in the limiting groove 56 is provided in the sliding groove, and a reset tension spring 58 is provided between the limiting plate 57 and the limiting groove 56.

[0061] In the initial state, the reset tension spring 58 always drives the bending plate 50 to drive the corresponding clamping plate 53 to contact the plane 52 through the limiting groove 56. When the driving gear 35 on one side descends, it is necessary to drive the rotating shaft 24 to rotate to adjust the swing angle of the drill bit 10. At this time, the active arc plate 55 on the lower side of the driving gear 35 will contact the corresponding passive arc plate 54 and drive the bending plate 50 to move toward the direction of the sliding groove, so that the clamping plate 53 is separated from the corresponding plane 52 and no longer limits the rotating shaft 24. At this time, the driving gear 35 is meshed with the swing gear 30, indirectly driving the rotating cylinder 1 to swing. When the driving gear 35 on one side rises, the passive arc plate 54 is no longer interfered, and the two bending plates 50 will move to the initial position and continue to limit the rotating shaft 24.

[0062] Example 3: Reference Fig.15 , Fig.16 , Fig.17 and Fig.18 As shown, on the basis of the first and second embodiments, in order to maintain the stability of the rotating cylinder 1 and the supporting cylinder 11 when the drill bit 10 is drilling, a stabilizing assembly 6 is provided on the outside of the supporting cylinder 11; specifically, the stabilizing assembly 6 includes a limiting cylinder 60, a contact ring 61, a receiving groove 62, a driving key 63, a ratchet tooth 64 and a toggle key 65, the limiting cylinder 60 with a U-shaped cross-section is sleeved on the outside of the supporting cylinder 11, and a contact ring 61 is rotatably sleeved on the outside of the limiting cylinder 60, and the contact ring 61 is used to contact with the well wall, In order to support the support tube 11, a receiving groove 62 which is connected with the sliding groove is symmetrically provided in the limit tube 60, and one end of the bending plate 50 located in the sliding groove is also located in the receiving groove 62, an annular groove is provided in the contact ring 61, a driving key 63 is provided on the inner wall of the annular groove, and a ratchet tooth 64 which is rotatably arranged in the receiving groove 62 on one side and meshed with the driving key 63, and a number of toggle keys 65 are also provided on the corresponding extension section of the bending plate 50, and the bending plate 50 is meshed with the ratchet teeth 64 of the ratchet wheel through the toggle key 65.

[0063] During specific operation, when the bending plate 50 is moved toward the sliding groove by the corresponding active arc plate 55, that is, the rotating cylinder 1 needs to rotate, the bending plate 50 on one side drives the ratchet teeth 64 to rotate through the toggle key 65 on its extension section, and the ratchet teeth 64 will drive the contact ring 61 to rotate through the driving key 63, so that the outer side surface of the contact ring 61 can be evenly contacted with the well wall, avoiding a certain degree of angular deviation between the support cylinder 11 and the well wall, so that only one side of the contact ring 61 rubs against the well wall, which causes the contact ring 61 to need to be replaced in advance.

[0064] After the angle of the rotating cylinder 1 is adjusted, the bending plate 50 will move to the initial position and continue to limit the rotating shaft 24. During the movement of the bending plate 50, the ratchet teeth 64 will continue to be toggled by the toggle key 65. Due to the one-way transmission characteristics of the ratchet teeth 64, the ratchet teeth 64 will not rotate with the contact ring 61 at this time, preventing the contact ring 61 from rotating in the opposite direction. When the bending plate 50 moves toward the direction of the sliding groove again next time, the contact ring 61 will continue to be driven to rotate by the ratchet teeth 64, so that the contact ring 61 continuously changes its contact angle with the well wall.

[0065] During operation: Step 1: The rotating cylinder 1 and the supporting cylinder 11 are connected through the connecting component 2 to achieve rapid assembly and replacement, and modular assembly and maintenance are performed according to different drilling requirements; and the connecting component 2 can ensure that the rotating cylinder 1 and the supporting cylinder 11 can rotate and swing flexibly, and at the same time prevent mud and foreign matter from entering through the sealing rubber ring 26.

[0066] Step 2: When the main shaft 13 is driven by an external driving device to rotate, it can drive the rotating cylinder 1 to rotate synchronously through the connecting component 2, so that the drill bit 10 can rotate and drill.

[0067] Step 3: The horizontal shaft 43 is driven to rotate by an external driving motor, and then the toggle gear 44 is rotated through the gear transmission. The toggle gear 44 drives the driving shaft 34 to move up and down through the toggle slot 45; the movement of the driving shaft 34 drives the driving gear 35 to engage with the swing gear 30, realizing the rotation of the rotating shaft 24, thereby indirectly changing the swing direction of the drill bit 10.

[0068] Step 4: The clamping plate 53 on the bending plate 50 contacts the plane 52 on the outside of the rotating shaft 24 to limit the rotation direction of the rotating shaft 24 to prevent the rotating shaft 24 from excessively rotating and causing the direction of travel of the drill bit 10 to deviate; when the swing angle of the drill bit 10 needs to be adjusted, the driving gear 35 descends, the active arc plate 55 contacts the passive arc plate 54, and the bending plate 50 is driven to move, so that the clamping plate 53 is separated from the plane 52, allowing the rotating shaft 24 to rotate to adjust the swing angle of the drill bit 10; after the driving gear 35 rises, the bending plate 50 returns to the initial position under the action of the reset spring 58, and continues to limit the rotating shaft 24 in sections to ensure that the angle of the drill bit 10 remains stable during the drilling process.

[0069] Step 6: When the rotating cylinder 1 is swinging, the bending plate 50 moves, and the ratchet teeth 64 are driven to rotate by the toggle key 65. The ratchet teeth 64 drive the contact ring 61 to rotate through the sliding key, so that the outer side of the contact ring 61 is in uniform contact with the well wall, avoiding angle deviation between the support cylinder 11 and the well wall, which causes unilateral wear of the contact ring 61; after the angle adjustment of the rotating cylinder 1 is completed, the bending plate 50 returns to the initial position and continues to limit the rotating shaft 24, and the one-way transmission characteristics of the ratchet teeth 64 are used to prevent the contact ring 61 from rotating in the opposite direction.

[0070] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0071] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A push-type rotary guide system, comprising a rotary cylinder and a drill bit mounted at the lower end thereof, characterized in that: The upper end of the rotating cylinder is hinged with a supporting cylinder, the inner wall of the supporting cylinder is provided with an annular ring, a main shaft is rotatably arranged in the annular ring, a connecting component is provided at the bottom of the main shaft, and the main shaft is hinged with the rotating cylinder through the connecting component; The connecting assembly includes a mounting groove opened on the top of the rotating cylinder, a mounting plate is installed in the mounting groove by bolt fixing, and the bottom of the main shaft is connected to the mounting plate by universal joint transmission; A rotating circle is rotatably arranged at the upper end of the mounting plate, a conical plate is symmetrically arranged at the upper end of the rotating circle, a rotating shaft is arranged in the middle of the conical plate, and both sides of the rotating shaft are rotatably connected to the inner wall of the supporting tube, and a swinging groove is symmetrically opened on the outer side of the supporting tube; A driving unit for driving the rotating shaft to rotate is also arranged on the outside of the rotating shaft, and the driving unit includes swing gears sleeved on both sides of the rotating shaft, an annular cavity is opened in the annular ring, an inner gear ring located in the annular cavity is sleeved on the outside of the main shaft, and a transmission cylinder is rotatably penetrated on the lower side of the annular ring, and the transmission cylinder is sleeved on one side of the annular cavity and is meshed with a transmission gear engaged with the inner gear ring; A driving shaft is slidably arranged in the transmission cylinder, and a driving gear is sleeved on one end of the driving shaft located outside the transmission cylinder, and the driving gear on one side is meshed with the adjacent swing gear; The levels of the two drive shafts are inconsistent; A driving assembly for driving the driving shaft to move up and down is arranged inside the supporting cylinder, and the driving assembly includes a supporting plate arranged on the inner wall of the supporting cylinder, a horizontal plate is arranged at the end of the supporting plate, and three rectangular grooves are opened on the horizontal plate, and horizontal shafts are rotatably inserted in the rectangular grooves on both sides, and a toggle gear located in the corresponding rectangular groove is sleeved on the outer side of the horizontal shaft; The outer side of the driving shaft is provided with a plurality of toggle grooves evenly distributed along its extended section, and the two toggle gears are respectively meshed with the toggle grooves on the outer side of the corresponding driving shaft; The sliding groove is symmetrically opened in the inner wall of the supporting cylinder, and a bending plate is slidably arranged in the sliding groove, and the bending plates are connected to each other by connecting plates. Several planes evenly distributed along its axis are symmetrically opened on the outer side of the rotating shaft, and a clamping plate corresponding to the plane is arranged on one side of the bending plate. The clamping plate is an elastic material with a memory shape effect. A passive arc plate is also arranged on the upper side of the bending plate, and an active arc plate is arranged on the lower side of the corresponding driving gear, and the active arc plate on one side contacts the corresponding passive arc plate. A limiting groove is opened on one side of the sliding groove, and a limiting plate located in the limiting groove is arranged in the sliding groove, and a reset tension spring is arranged between the limiting plate and the limiting groove.

2. A push-type rotary guide system according to claim 1, characterized in that: A sealing rubber ring made of a flexible material is disposed in the gap between the rotating cylinder and the supporting cylinder, and a sealing rubber ring is also disposed in the swinging groove, and the bottom of the sealing rubber ring is rotatably connected to the upper side of the rotating cylinder.

3. A push-type rotary guide system according to claim 1, characterized in that: The inner wall of the transmission cylinder is provided with several structural plates distributed along its axis, and the gaps between the structural plates are structural grooves. A matching plate corresponding to the structural groove is provided on the outer side of the drive shaft, and the matching plate on the outer side of the drive shaft with a lower horizontal height on one side is located in the structural groove.

4. The push-type rotary guide system according to claim 1, characterized in that: The two transverse axes both extend into the rectangular groove in the middle and are connected by gear transmission.

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