An intelligent rotary steerable drilling device

Abstract

The present invention relates to an intelligent rotary steerable drilling device applied to the field of drilling equipment. Through two plugging units and a fixing block, the drill bit and the drill collar are radially connected, so that when the operation feasibility of releasing the stuck drill state by reverse rotation is relatively low, the resistance encountered during reverse rotation can be used as a reminder. In addition, through the cooperation of a driving motor with a double output end and a rotary joint, when the second pipe body rotates to realize the alternating extension of the plunger, the cleaning rod can be driven to continuously clean the filter screen. Finally, through threaded parts, movable parts, driven gears, tooth conditions and constraint gears, the drill bit is assisted to adjust the connection mode between the drill bit and the drill collar when the drill is stuck, so as to facilitate the multi-angle release of the stuck drill operation.

Description

Technical Field

[0001] The present invention relates to a rotary steerable drilling device, and particularly to an intelligent rotary steerable drilling device applied to the field of drilling equipment. Background Art

[0002] Rotary steerable drilling equipment is an important part of modern drilling technology. It plays a key role in oil and gas development through its precise wellbore trajectory control and high-efficiency drilling ability. With the continuous progress of technology, rotary steerable equipment will continue to drive the development of the drilling industry in the future. Compared with traditional drilling methods, rotary steerable drilling equipment can adjust the wellbore trajectory while the drill string is rotating, thus improving drilling efficiency and accuracy.

[0003] The specification of Chinese invention patent CN118167202A discloses a rotary steerable drilling system, which relates to the technical field. The drill bit can be turned in different directions through multiple sets of pushing components arranged circumferentially, and has the advantages of simple structure and convenient control. In addition, the specification of Chinese invention patent CN118128428A discloses a rotary steerable drilling device, which requires fewer components, effectively saves the manufacturing cost of the instrument, is easy to control, can effectively improve the reliability of downhole tools and improve the steering and inclination accuracy.

[0004] When the existing rotary steerable drilling equipment is working, it uses the pushing action of the fluid to achieve corresponding guiding treatment. However, it is difficult to make effective adjustments when the drill bit gets stuck. Especially when it is necessary to reverse the rotation to remove the drill bit, the thread connection direction between the drill bit and the drill string is the same as the rotation direction of the drill bit, and the clamping action between the drill bit and the clamping point is greater than the thread connection action between the drill bit and the drill string, which will cause the drill bit to separate from the drill string during the reverse rotation process. Summary of the Invention

[0005] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is how to assist the drill bit for guiding drilling to achieve flexible treatment in the stuck state.

[0006] To solve the above problems, the present invention provides an intelligent rotary steerable drilling device, which includes a drill collar. A centralizer is installed on the surface of one end of the drill collar. One end of the drill collar penetrates and is connected with a first pipe body. The end of the first pipe body is connected with a second pipe body through a rotary joint. A flow guiding member is installed inside the drill collar;

[0007] Two symmetrically arranged plugging units are installed on the inner wall of the other end of the drill collar. Each plugging unit includes a square block. An activity frame is hinged on the surface of the square block. A micro electric telescopic rod is connected to the inner side of the activity frame. The tail end of the activity frame is hinged with a plugging block. A tooth condition is connected to one side surface of the plugging block;

[0008] The inner thread at the other end of the drill collar is connected with a threaded part with two symmetrically arranged constraint grooves. The inside of the threaded part is movably connected with a movable part through a movable ball. One end of the movable part away from the flow guiding part is fixedly connected with a drill bit. The other end of the movable part is fixedly connected with a fixed block with a through groove. Inside the through groove, a constraint gear is installed through a damping rotating shaft. A driven gear is installed inside the movable part, and the driven gear is connected with the constraint gear through a long rod. Two plug-in racks that are both matched with the constraint grooves are meshed and connected to the surface of the driven gear.

[0009] In the above intelligent rotary steerable drilling device, through the plug-in unit and threaded connection, the drill bit and the drill collar can be axially and radially connected. Thus, when the operability of releasing the stuck drill state by reverse rotation is poor in the subsequent process, it can play a prompting role by virtue of the resistance during reverse rotation.

[0010] As a further improvement of the present application, a driving motor is installed on the inner wall of the drill collar, and the driving motor has two output ends. Both output ends of the driving motor are connected with a transmission unit. A plurality of flow guiding pipes with their tails extending to the outer surface of the drill collar are installed through the inner wall of the flow guiding part. A plunger is slidably connected inside the flow guiding pipe. A liquid outlet with a diameter not greater than the inner diameter of the flow guiding pipe is provided on the tail surface of the second pipe body, and the tail end of the second pipe body is rotatably connected inside the flow guiding part.

[0011] As a further improvement of the present application, the transmission unit includes a first gear and a second gear meshed with the first gear. Among them, two first gears are respectively connected with the two output ends of the driving motor, and two second gears are respectively sleeved on the surfaces of the first pipe body and the second pipe body.

[0012] As a further improvement of the present application, a filter screen and a bracket are fixedly connected to the inner wall of the first pipe body away from the second pipe body, and the bracket is located on the side of the filter screen close to the second pipe body. A rod body extending to the outside of the filter screen is rotatably connected to the surface of the bracket, and a cleaning rod that fits the outer surface of the filter screen is connected to the surface of the rod body.

[0013] As a further improvement of the present application, in the initial state, the vertical distance value between the two plug-in blocks is greater than the height value of the fixed block, and in the initial state, the ends of the two plug-in racks away from the driven gear do not protrude from the surface of the movable part.

[0014] As a further improvement of the present application, when the two tooth conditions approach each other, they are meshed with the constraint gear. The constraint gear drives the driven gear to rotate, and the driven gear drives the two plug-in racks to be inserted into the constraint grooves.

[0015] As a further improvement of the present application, an integrated control board is installed inside the drill collar. An attitude measurement sensor and an azimuth gamma sensor are installed on the integrated control board for detecting the inclination attitude information of the drill bit.

[0016] As a further improvement of the present application, when the fixing block is connected to the drill collar through a threaded member, the through groove in the fixing block coincides with the projection of the plugging block in the vertical direction.

[0017] As a further improvement of the present application, there is a gap between the end of the drill bit close to the drill collar and the end of the threaded member, and the end of the threaded member is connected to the surface of the movable member through an elastic filter cloth.

[0018] In summary, through the two plugging units and the fixing block, the drill bit and the drill collar form a radial connection, so that when the feasibility of reversing the rotation to release the stuck drill state is relatively low, the resistance encountered during reverse rotation can be used as a reminder. In addition, through the cooperation of the drive motor with double output ends and the rotary joint, when the second pipe body rotates to realize the alternating extension of the plunger, the cleaning rod can be driven to continuously clean the filter screen. Finally, through the threaded member, the movable member, the driven gear, the tooth condition and the constraint gear, it is assisted to adjust the connection mode between the drill bit and the drill collar when the drill bit is stuck, so as to facilitate the release of the stuck drill operation from multiple angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present application;

[0020] Figure 2 It is a schematic diagram of the internal structure of the drill collar of the first embodiment of the present application;

[0021] Figure 3 For the present application Figure 2 The enlarged schematic diagram at A in;

[0022] Figure 4 It is a schematic diagram of the state where the drill collar and the drill bit fall off during reverse rotation under the prior art of the present application;

[0023] Figure 5 It is a schematic diagram of the liquid outlet on the surface of the second pipe body of the first embodiment of the present application;

[0024] Figure 6 It is a structural diagram of the filter screen and the cleaning rod of the first embodiment of the present application;

[0025] Figure 7 It is a state diagram of the relative rotation of the first pipe body and the second pipe body of the first embodiment of the present application;

[0026] Figure 8 It is an installation diagram of the threaded member, the movable member and the drill bit of the second embodiment of the present application;

[0027] Figure 9 It is an installation diagram of the fixing block, the movable member and the plugging unit of the second embodiment of the present application;

[0028] Figure 10 For Figure 9 the enlarged schematic view of position B in

[0029] Figure 11 the installation diagram of the plug-in rack, restraint gear and driven gear according to the second embodiment of the present application;

[0030] Figure 12 the state diagram of the plug-in rack extending out of the movable part when the restraint gear and the driven gear rotate according to the second embodiment of the present application.

[0031] Description of reference numerals in the figure:

[0032] 1. Drill collar; 2. Centralizer; 3. Drill bit; 4. Filter screen; 41. Cleaning rod; 5. Transmission unit; 51. First gear; 52. Second gear; 6. Driving motor; 7. First pipe body; 8. Second pipe body; 9. Flow guiding member; 91. Flow guiding pipe; 92. Plunger; 10. Plug-in unit; 101. Square block; 102. Micro electric telescopic rod; 103. Movable frame; 104. Tooth condition; 105. Plug-in block; 11. Threaded part; 12. Movable part; 13. Fixed block; 14. Restraint gear; 15. Plug-in rack; 16. Driven gear. Specific embodiments

[0033] The following will describe in detail the two embodiments of the present application with reference to the accompanying drawings.

[0034] The first embodiment:

[0035] Figures 1 - 2 There is shown an intelligent rotary steerable drilling device, including a drill collar 1, a centralizer 2 is installed on the surface of one end of the drill collar 1, one end of the drill collar 1 is penetrated and connected with a first pipe body 7, the end of the first pipe body 7 is connected with a second pipe body 8 through a rotary joint, and a flow guiding member 9 is installed inside the drill collar 1;

[0036] Figure 3 There is shown that two symmetrically arranged plug-in units 10 are installed on the inner wall of the other end of the drill collar 1, and the plug-in unit 10 includes a square block 101, a movable frame 103 is hinged on the surface of the square block 101, a micro electric telescopic rod 102 is connected to the inner side of the movable frame 103, and a plug-in block 105 is hinged to the tail end of the movable frame 103;

[0037] When the fixed block 13 is connected to the drill collar 1 through the threaded part 11, the through groove in the fixed block 13 coincides with the vertical projection of the plug-in block 105.

[0038] Specifically, when installing the drill bit 3 on the drill collar 1, it is necessary to first thread the threaded part 11 to one end of the drill collar 1. Since the drill bit 3 and the movable part 12 are fixedly connected and the movable part 12 is movably connected to the threaded part 11 in the initial state, the fixed block 13 fixedly connected to the movable part 12 follows and enters the interior of the drill collar 1. Then, the micro-electric extension rod 102 is started to make the movable frame 103 move inward, thereby driving the plug-in block 105 to move downward until it is plugged into the through groove, thereby indirectly forming a radial connection to the drill bit 3.

[0039] Therefore, when the drill is stuck and needs to be rotated in the reverse direction to drive the drill bit 3 to release the drill stuck state, if the tightening direction of the drill collar 1 and the threaded member 11 is in the forward direction, the rotation direction of the drill bit 3 is in the forward direction, and the force required for the drill bit 3 to release the drill stuck state is greater than the thread tightening effect of the drill collar 1 and the threaded member 11 (that is, when rotating in the reverse direction, the drill bit 3 is affected by the drill stuck effect, and when the drill collar 1 rotates in the reverse direction, the drill bit 3 and the drill collar 1 are in a relatively static state, which will gradually release the thread relationship between the drill collar 1 and the threaded member 11, thereby causing the drill bit 3 to fall off), at this time, the drill bit 3 will be separated from the end of the drill collar 1 (such as Figure 4 as shown).

[0040] For this purpose, a plug-in unit 10 is designed to form a radial plug-in process with the drill bit 3. Even when reversing, it will be constrained by the plug-in block 105 and the through groove to form an obstruction to serve as a reminder and avoid separation of the drill bit 3 and the drill collar 1 due to blind reversal.

[0041] Figure 5 It is shown that a driving motor 6 is installed on the inner wall of the drill collar 1, and the driving motor 6 has dual output ends, and the two output ends of the driving motor 6 are connected to the transmission unit 5. A plurality of guide tubes 91 with their tail ends extending to the outer surface of the drill collar 1 are installed through the inner wall of the guide member 9, and a plunger 92 is slidably connected to the inner wall of the guide tube 91. A liquid outlet with a diameter not greater than the inner diameter of the guide tube 91 is provided on the tail end surface of the No. 2 tube body 8, and the tail end of the No. 2 tube body 8 is rotatably connected to the inside of the guide member 9.

[0042] The transmission unit 5 includes a first gear 51 and a second gear 52 meshing with the first gear 51 , wherein the two first gears 51 are respectively connected to the two output ends of the driving motor 6 , and the two second gears 52 are respectively sleeved on the surfaces of the first tube body 7 and the second tube body 8 .

[0043] Figure 6 It is shown that the inner wall of one end of the No. 1 tube body 7 facing away from the No. 2 tube body 8 is fixedly connected with a filter 4 and a bracket, and the bracket is located on the side of the filter 4 close to the No. 2 tube body 8, and the surface of the bracket is rotatably connected with a rod body extending to the outside of the filter 4, and the surface of the rod body is connected with a cleaning rod 41 that fits with the outer surface of the filter 4.

[0044] Specifically, during guidance, the mud flow is filtered through the filter screen 4 on the surface of the No. 1 pipe body 7 and then enters the No. 2 pipe body 8. The transmission unit 5 on the surface of the No. 2 pipe body 8 is driven to rotate by the driving motor 6, and the liquid outlet on the surface of the No. 2 pipe body 8 is adjusted to be alternately aligned with multiple guide tubes 91, driving the impact plunger 92 to move and abut against the inner wall of the well. Under the continuous action of the subsequent liquid, the plunger 92 is alternately pushed out from the surface of the drill collar 1, thereby guiding the drill bit 3.

[0045] In addition, when both output ends of the driving motor 6 are in a rotating state, the connection between the transmission unit 5 and the No. 1 tube body 7 can be used to drive the differential relative rotation of the No. 1 tube body 7 and the No. 2 tube body 8. Under the action of the rotating joint, the liquid can flow smoothly between the No. 1 tube body 7 and the No. 2 tube body 8 without interfering with the relative rotation between the two.

[0046] When the first tube body 7 rotates, the fixedly connected bracket drives the rod body to rotate, and then drives the cleaning rod 41 on the surface of the rod body to rotate, so as to continuously and effectively clean the filter screen 4 on the surface, thereby preventing the first tube body 7 and the second tube body 8 from being blocked by foreign matter in the liquid inside. Figure 7 as shown).

[0047] In the initial state, the vertical distance between the two plug-in blocks 105 is greater than the height of the fixed block 13 , and in the initial state, the ends of the two plug-in racks 15 facing away from the driven gear 16 do not protrude from the surface of the movable member 12 .

[0048] Specifically, such a design can ensure that the fixing block 13 will not be blocked by the plug-in block 105 when the thread is rotated into the interior of the drill collar 1 .

[0049] An integrated control board is installed inside the drill collar 1 , and an attitude measurement sensor and an azimuth gamma sensor are installed on the integrated control board to detect the tilt attitude information of the drill bit 3 .

[0050] Specifically, the use of high-precision sensors can assist in achieving the accuracy of information collected when the drill bit 3 is working, and provide reliable data for subsequent intelligent adjustments.

[0051] The second implementation method:

[0052] Figures 8 - 11It is shown that the inner thread at the other end of the drill collar 1 is connected with a threaded part 11 with two constraint grooves symmetrically arranged at two points. The inside of the threaded part 11 is movably connected with a movable part 12 through a movable ball. One end of the movable part 12 away from the flow guide part 9 is fixedly connected with a drill bit 3. The other end of the movable part 12 is fixedly connected with a fixed block 13 with a through groove inside. A constraint gear 14 meshing with the tooth condition 104 is installed in the through groove through a damping rotating shaft. A driven gear 16 is installed inside the movable part 12, and the driven gear 16 is connected with the constraint gear 14 through a long rod. Two plugging racks 15 both matching with the constraint groove are meshingly connected to the surface of the driven gear 16. One side surface of the plugging block 105 is connected with the tooth condition 104.

[0053] There is a gap between one end of the drill bit 3 close to the drill collar 1 and the end of the threaded part 11. The end of the threaded part 11 is connected with the surface of the movable part 12 through an elastic filter cloth.

[0054] When the two tooth conditions 104 approach each other, they mesh with the constraint gear 14. The constraint gear 14 drives the driven gear 16 to rotate, and the driven gear 16 drives the two plugging racks 15 to be plugged into the constraint grooves.

[0055] Different from the first embodiment, in the first embodiment, the drill bit 3 and the drill collar 1 are arranged on the same vertical axis. When sticking of the drill occurs and the force of sticking is large, making the operation of reverse rotation not very feasible, this embodiment can be used to adjust the connection mode between the drill bit 3 and the drill collar 1, so that the drill bit 3 and the drill collar 1 are adjusted by corresponding angles to get out of the stuck state.

[0056] Specifically, when the plugging block 105 in the plugging unit 10 is plugged into the through groove, as the tooth condition 104 gradually approaches the constraint gear 14, the two originally separated can gradually become in a meshing connection state. Then, as the tooth condition 104 drops, it drives the constraint gear 14 to rotate, and drives the driven gear 16 to rotate synchronously under the action of the long rod, so that the plugging rack 15 can extend out of the inside of the movable part 12 and be plugged into the inside of the constraint groove, realizing the constraint connection between the movable part 12 and the threaded part 11, and further realizing the coaxial arrangement of the drill bit 3, the threaded part 11 and the drill collar 1 (as Figure 12 shown).

[0057] When it is necessary to adjust the connection mode between the drill bit 3 and the drill collar 1, the plug-in unit 10 can be first retracted. Through the meshing action between the gears, the plug-in rack 15 is driven to retract into the interior of the movable part 12. At this time, part of the tooth condition 104 remains in the through groove, retaining the constraint effect on the fixed block 13. At this time, the drill bit 3 and the movable part 12 are movably connected to the threaded part 11 through the movable ball (because there is a gap between the inner wall of the threaded part 11 and the outer surface of the movable part 12, and the position of the movable ball is near the end of the threaded part 11). At this time, through the guiding action, the drill collar 1 can be driven to change direction, so as to realize the angle adjustment of the drill collar 1 and the threaded part 11 relative to the drill bit 3 (because at this time the drill bit 3 is in a stuck state, the rotation of the drill collar 1 stops, and the drill bit 3 and the drill collar 1 are in a relatively static state. With the angle adjustment of the drill collar 1, under the action of the movable ball and the gap, the installation angles of the drill collar 1 and the drill bit 3 are adjusted), so as to facilitate subsequent pulling to get out of the stuck state.

[0058] The presence of the filter cloth is used to prevent foreign objects from entering the gap between the threaded part 11 and the movable part 12, ensuring that there are no solid obstacles in the gap.

[0059] In summary, through the two plug-in units 10 and the fixed block 13, the drill bit 3 and the drill collar 1 are radially connected. In this way, when the operation of reversing the rotation to release the stuck state has a low feasibility (that is, there is a risk of the drill bit 3 and the drill collar 1 being separated), the resistance encountered during reverse rotation can be used as a reminder. In addition, through the cooperation of the drive motor 6 with a double output end and the rotary joint, when the second pipe body 8 rotates to realize the alternating extension of the plunger 92, the cleaning rod 41 can be driven to continuously clean the filter screen 4. Finally, through the threaded part 11, the movable part 12, the driven gear 16, the tooth condition 104 and the constraint gear 14, the connection mode between the drill bit 3 and the drill collar 1 can be adjusted when the drill bit 3 is stuck, thereby facilitating the release of the stuck state from multiple angles.

[0060] Combined with the current actual requirements, the above-mentioned implementation mode adopted in this application, the protection scope is not limited to this. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. An intelligent rotary steerable drilling device, comprising a drill collar (1), a centralizer (2) being mounted on one end surface of the drill collar (1), and a first pipe body (7) penetrating through one end of the drill collar (1), characterized in that: The end of the first pipe body (7) is connected to the second pipe body (8) via a rotary joint, and a flow guide (9) is installed inside the drill collar (1); The inner wall of the other end of the drill collar (1) is provided with two symmetrically arranged plug-in units (10), and the plug-in unit (10) comprises a block (101), a movable frame (103) is hingedly connected to the surface of the block (101), a micro electric extension rod (102) is connected to the inner side of the movable frame (103), a plug-in block (105) is hingedly connected to the rear end of the movable frame (103), and a toothed condition (104) is connected to one side surface of the plug-in block (105); The other end of the drill collar (1) is internally threadedly connected to a threaded member (11) having two point-symmetrically arranged constraint grooves, the threaded member (11) is internally connected to a movable member (12) via a movable ball, the end of the movable member (12) facing away from the guide member (9) is fixedly connected to a drill bit (3), the other end of the movable member (12) is fixedly connected to a fixed block (13) having a through groove, the through groove is internally mounted with a gear (14) constrained by a gear condition (104) via a damping shaft, the movable member (12) is internally mounted with a driven gear (16), and the driven gear (16) is connected to the constraint gear (14) via a long rod, and the surface of the driven gear (16) is meshingly connected to two splice racks (15) that match the constraint grooves.

2. The intelligent rotary steerable drilling device according to claim 1, characterized in that: A driving motor (6) is installed on the inner wall of the drill collar (1), and the driving motor (6) has two output ends. Both output ends of the driving motor (6) are connected to a transmission unit (5). A plurality of flow guide tubes (91) are installed through the inner wall of the flow guide member (9), and the tail ends of the flow guide tubes (91) extend to the outer surface of the drill collar (1). A plunger (92) is slidably connected to the inner wall of the flow guide tube (91). A liquid outlet with a diameter not greater than the inner diameter of the flow guide tube (91) is provided on the tail end surface of the second tube body (8), and the tail end of the second tube body (8) is rotatably connected to the inside of the flow guide member (9).

3. The intelligent rotary steerable drilling device according to claim 2, characterized in that: The transmission unit (5) comprises a first gear (51) and a second gear (52) meshing with the first gear (51), wherein the two first gears (51) are respectively connected to two output ends of the driving motor (6), and the two second gears (52) are respectively sleeved on the surfaces of the first tube body (7) and the second tube body (8).

4. The intelligent rotary steerable drilling device according to claim 3, characterized in that: The inner wall of one end of the first tube body (7) facing away from the second tube body (8) is fixedly connected with a filter screen (4) and a bracket, and the bracket is located on a side of the filter screen (4) close to the second tube body (8), and the surface of the bracket is rotatably connected to a rod body extending to the outside of the filter screen (4), and the surface of the rod body is connected to a cleaning rod (41) that fits the outer surface of the filter screen (4).

5. The intelligent rotary steerable drilling device according to claim 1, characterized in that: In the initial state, the vertical distance between the two plug-in blocks (105) is greater than the height of the fixed block (13), and in the initial state, the ends of the two plug-in racks (15) facing away from the driven gear (16) do not protrude from the surface of the movable part (12).

6. The intelligent rotary steerable drilling device according to claim 1, characterized in that: When the two toothed racks (104) are close to each other, they mesh with the constraint gear (14), the constraint gear (14) drives the driven gear (16) to rotate, and the driven gear (16) drives the two plug-in racks (15) to be plugged into the constraint groove.

7. The intelligent rotary steerable drilling device according to claim 1, characterized in that: An integrated control board is installed inside the drill collar (1), and an attitude measurement sensor and an azimuth gamma sensor are installed on the integrated control board for detecting the tilt attitude information of the drill bit (3).

8. The intelligent rotary steerable drilling device according to claim 1, characterized in that: When the fixing block (13) is connected to the drill collar (1) via the threaded member (11), the through groove in the fixing block (13) coincides with the projection of the plug-in block (105) in the vertical direction.

9. The intelligent rotary steerable drilling device according to claim 1, characterized in that: There is a gap between one end of the drill bit (3) close to the drill collar (1) and the end of the threaded member (11), and the end of the threaded member (11) is connected to the surface of the movable member (12) via an elastic filter cloth.

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