Rotary steering drilling tool

Abstract

The invention discloses a rotary steering drilling tool, and relates to the technical field of drilling, the rotary steering drilling tool comprises a fixed cylinder and a drill rod rotatably arranged in the fixed cylinder, and a drill bit is fixedly arranged at the bottom end of the drill rod. According to the rotary guiding drilling tool, the rollers are arranged to make contact with the surface of the drill rod and make the rollers synchronously rotate along with the drill rod, guiding control can be conducted on the drill rod, the drilling direction of the drill rod can be accurately controlled, and correction can be conducted in time when the drill rod deviates from a preset track due to the conditions of stratum changes, uneven rock hardness and the like; in addition, the drill rod can conduct guide drilling after the set angle is adjusted, the deviation of a well hole can be effectively reduced, the drilling quality and precision are improved, cooling oil can evenly overflow to the contact face of the roller and the drill rod in the roller rotating process, the contact face can be rapidly cooled and lubricated, and the service life of the roller is prolonged. And the guiding precision of the follow-up drill rod is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of drilling, in particular to a rotary steerable drilling tool. Background Art

[0002] The rotary steerable drilling tool is an advanced tool widely used in oil and gas drilling projects.

[0003] According to the patent application number CN202321189146.6, it includes a sleeve, a guide plate is fixedly installed inside the sleeve, a drill rod is rotatably installed on the inner side of the guide plate, a fixed plate is fixedly installed on the bottom of the drill rod, a bottom groove is opened at the bottom of the fixed plate, a drill bit is overlapped on the bottom wall of the bottom groove, a clamping groove is fixedly connected to the outer wall of the top of the drill bit, a fixing rod is fixedly connected to the bottom of the sleeve, and a limiting groove is opened inside the sleeve; two side walls of the guide plate are fixedly connected to connecting plates, two side walls of the inner side of the guide plate are both provided with grooves, a fixing column is fixedly installed inside the groove, a connecting plate is sleeved on the outer wall of the bottom end of the drill rod, and a groove is opened on the outer wall of the drill rod; two side walls of the bottom groove are provided with movable grooves, a sliding groove is opened on the side of the movable groove away from the bottom groove, and the inner wall of the sliding groove is slidably connected to the movable rod; In the above patent, the convenient installation of the drill rod and the adjustment of the drill rod angle are achieved by the coordinated arrangement of the telescopic column, spring one and steel balls, wherein the telescopic column and spring one are telescopic structures. In the actual drilling process, when encountering changes in the formation, uneven rock hardness, etc., it is easy to cause the drill rod to deviate from the predetermined trajectory. It is difficult to guide and correct the drill rod at different drilling angles through the structure in the above patent, and the steel balls will generate heat during the long-term rolling friction on the surface of the drill rod, which will cause greater wear on the contact surface between the two, affecting the subsequent guidance accuracy of the drill rod. Therefore, in view of the above shortcomings, the present invention makes the following improvements. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a rotary steerable drilling tool to solve the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a rotary directional drilling tool, comprising a fixed barrel and a drill rod rotatably arranged inside the fixed barrel, a drill bit fixedly arranged at the bottom end of the drill rod, a fixed ring is sleeved on the surface of the drill rod inside the fixed barrel, and an annular plate is rotatably arranged on the surface of the fixed ring, a roller is rotatably arranged inside the fixed ring, and an overflow hole is opened on the surface of the roller, a plurality of rollers are arranged and equidistantly distributed on the surface of the drill rod in a surrounding manner, a driving part for controlling the roller to move left and right is arranged inside the annular plate, and the roller is controlled by the driving part to contact with the surface of the drill rod so as to guide and correct the deviation of the drill rod; The top surface of the fixed ring is provided with a lubrication mechanism, through which cooling oil is injected into the roller, and the cooling oil is discharged from the overflow hole by the centrifugal force generated when the roller rotates, so as to be used for cooling and lubricating the contact surface between the roller and the drill rod.

[0006] Preferably, the driving part includes a sliding plate slidably arranged inside the fixed ring, and one side of the sliding plate is rotatably connected to the bottom surface of the roller through an L-shaped rod, and an inclined groove matching the sliding plate is opened inside the annular plate, and one side of the sliding plate located inside the inclined groove is inclined.

[0007] Preferably, a slide groove matched with the sliding plate is opened inside the fixed ring, and a guide block is fixedly provided on the inner wall of the slide groove, a guide groove matched with the guide block is opened on the surface of the sliding plate, and a buffer spring is fixedly provided between the guide block and the inner wall of the guide groove.

[0008] Preferably, the lubrication mechanism includes an annular oil storage box with a support rod arranged on the top surface of the fixed ring, and an oil storage frame is arranged inside the annular oil storage box and on the top surface of the roller, an oil absorption sponge is arranged inside the oil storage frame, the inner wall of the annular oil storage box is connected with the surface of the oil storage frame through a telescopic tube, the bottom surface of the oil storage frame is rotatably connected with the top surface of the roller through an oil outlet pipe, and the top surface of the roller is provided with an extrusion piece for squeezing the oil absorption sponge.

[0009] Preferably, the extrusion member includes fixed rods fixedly arranged on both sides of the top surface of the roller, extrusion balls are fixedly arranged on opposite sides of the two fixed rods, extrusion plates are movably arranged on both sides inside the oil storage frame, and U-shaped rods are fixedly arranged on the opposite sides of the two extrusion plates, a sleeve is rotatably arranged on the surface of the U-shaped rod, and the surface of the oil storage frame is fixedly connected to the surface of the U-shaped rod through a clamping spring.

[0010] Preferably, a fixing column is provided on the top surface of the inner wall of the fixing cylinder, and a first motor is provided inside the fixing column via a first universal ball, and the protruding end of the first motor is threadedly connected to the top end of the drill rod via a coupling.

[0011] Preferably, mounting tubes are fixedly provided on both sides of the surface of the fixing ring, and an adjusting rod is provided inside the mounting tube via a second universal ball, and an adjusting piece for controlling the left and right movement of the adjusting rod is provided at the top of the fixing tube.

[0012] Preferably, a movable ring is threadedly connected to the surface of the mounting tube, and a mounting ring is rotatably provided on the surface of the movable ring, an insertion rod is fixedly provided on the top surface of the mounting ring, and a plurality of insertion holes adapted to the insertion rod are opened on the surface of the annular plate.

[0013] Preferably, the adjusting member includes a cross bar rotatably arranged at the top of the fixed cylinder through a fixing frame, and threaded rods are fixedly arranged at both ends of the cross bar, a sliding block is threadedly connected to the surface of the threaded rod, an electric push rod is fixedly arranged on the bottom surface of the sliding block, and the protruding end of the electric push rod is fixedly connected to the top of the adjusting rod.

[0014] Beneficial Effects The present invention provides a rotary steerable drilling tool, which has the following beneficial effects compared with the prior art: (1) The rotary directional drilling tool can guide the drill pipe by setting a plurality of rollers in contact with the surface of the drill pipe and making the rollers rotate synchronously with the drill pipe, so as to accurately control the drilling direction of the drill pipe. When the drill pipe deviates from the predetermined trajectory due to formation changes, uneven rock hardness, etc., it can be corrected in time. The drill pipe can also be guided for drilling after adjusting the predetermined angle, which can effectively reduce the deviation of the wellbore and improve the quality and accuracy of drilling. In addition, during the rotation of the rollers, cooling oil can be intermittently and evenly overflowed onto the contact surface between the rollers and the drill pipe, which can quickly cool and lubricate the contact surface, further improving the subsequent guidance accuracy of the drill pipe.

[0015] (2) The rotary steerable drilling tool can be adapted to drill pipes of different diameters within a certain range by adjusting the position of the roller inside the fixed ring, thereby further expanding the applicable range of the drill pipes.

[0016] (3) The rotary steerable drilling tool can adjust the drill rod angle by means of the coordinated arrangement of the adjusting rod, the adjusting member and the second universal ball. After the drilling angle is adjusted, the tool can move forward in the drilling direction, thereby improving the application range of the drilling tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the structure of the present invention; Figure 2 It is a cross-sectional view of the fixed cylinder structure of the present invention; Figure 3 For the present invention Figure 1 A partial enlarged view of the middle A; Figure 4 is a cross-sectional view of the fixing ring and the annular plate structure of the present invention; Figure 5 For the present invention Figure 4 A partial enlarged view of point B in the middle; Figure 6 It is a bottom view of the internal structure of the annular plate and the fixing ring of the present invention.

[0018] In the figure: 1, fixed cylinder; 2, drill rod; 3, drill bit; 4, annular plate; 5, fixed ring; 6, roller; 7, lubrication mechanism; 71, annular oil storage box; 72, oil storage frame; 73, oil absorption sponge; 74, telescopic tube; 75, oil outlet pipe; 76, fixed rod; 77, squeeze ball; 78, squeeze plate; 79, U-shaped rod; 8, sliding plate; 9, inclined groove; 10, guide block; 11, buffer spring; 12, first gear; 13, second gear; 14, first motor; 15, mounting cylinder; 16, adjustment rod; 17, adjustment member; 171, threaded rod; 172, electric push rod; 173, sliding block; 18, movable ring; 19, mounting ring; 20, plug rod; 21, second motor. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0020] Embodiment 1 See also Figures 1 to 5 As shown, the present invention provides a technical solution, and the specific improvements are as follows: A rotary directional drilling tool comprises a fixed barrel 1 and a drill rod 2 rotatably arranged inside the fixed barrel 1, a fixed column is arranged on the top surface of the inner wall of the fixed barrel 1, and a first motor 14 is arranged inside the fixed column through a first universal ball, the extended end of the first motor 14 is threadedly connected to the top end of the drill rod 2 through a coupling, so that the drill rod 2 and the drill bit 3 of different diameters can be easily replaced, the drill bit 3 is fixedly arranged at the bottom end of the drill rod 2, a fixed ring 5 is sleeved on the surface of the drill rod 2 inside the fixed barrel 1, and an annular plate 4 is rotatably arranged on the surface of the fixed ring 5, a roller 6 is rotatably arranged inside the fixed ring 5, and an overflow hole is opened on the surface of the roller 6, a plurality of rollers 6 are arranged and are equidistantly distributed on the surface of the drill rod 2 in a surrounding manner, and the rollers 6 and the surface of the drill rod 2 are rotatably arranged. The surfaces of the rollers 6 are in contact with each other, and a driving unit for controlling the roller 6 to move left and right is arranged inside the annular plate 4. The roller 6 is controlled by the driving unit to contact the surface of the drill rod 2 so as to guide and correct the drill rod 2. The driving unit includes a sliding plate 8 slidably arranged inside the fixing ring 5, and one side of the sliding plate 8 is rotatably connected to the bottom surface of the roller 6 through an L-shaped rod. An inclined groove 9 adapted to the sliding plate 8 is provided inside the annular plate 4, and one side of the sliding plate 8 located inside the inclined groove 9 is inclined. A sliding groove adapted to the sliding plate 8 is provided inside the fixing ring 5, and a guide block 10 is fixedly arranged on the inner wall of the sliding groove. A guide groove adapted to the guide block 10 is provided on the surface of the sliding plate 8, and a buffer spring 11 is fixedly arranged between the guide block 10 and the inner wall of the guide groove; The top surface of the fixed ring 5 is provided with a lubrication mechanism 7, through which cooling oil is injected into the roller 6, and the cooling oil is discharged from the overflow hole by the centrifugal force generated when the roller 6 rotates, so as to be used for cooling and lubricating the contact surface between the roller 6 and the drill rod 2. The lubrication mechanism 7 includes an annular oil storage box 71 with a support rod arranged on the top surface of the fixed ring 5, and an oil storage frame 72 is arranged inside the annular oil storage box 71 and on the top surface of the roller 6, the front of the annular oil storage box 71 is connected with an oil inlet pipe, and an oil absorption sponge 73 is arranged inside the oil storage frame 72, the inner wall of the annular oil storage box 71 is connected with the surface of the oil storage frame 72 through a telescopic tube 74, the bottom surface of the oil storage frame 72 is rotatably connected to the top surface of the roller 6 through an oil outlet pipe 75, the inside of the oil outlet pipe 75 is provided with a solenoid valve, and the top surface of the roller 6 is provided with an extrusion piece for squeezing the oil absorption sponge 73; The extrusion member includes fixed rods 76 fixedly arranged on both sides of the top surface of the roller 6, and extrusion balls 77 are fixedly arranged on the opposite sides of the two fixed rods 76. Extrusion plates 78 are movably arranged on both sides of the inside of the oil storage frame 72, and a U-shaped rod 79 is fixedly arranged on the opposite sides of the two extrusion plates 78. A sleeve is rotatably arranged on the surface of the U-shaped rod 79. The surface of the oil storage frame 72 is fixedly connected to the surface of the U-shaped rod 79 through a clamping spring. A through groove adapted to the U-shaped rod 79 is opened inside the oil storage frame 72, and a sealing ring is arranged inside the through groove. The drill rod 2 is inserted into the fixing ring 5 in advance and connected to the output end of the first motor 14. The person rotates the annular plate 4 so that the annular plate 4 pushes the sliding plate 8 toward the drill rod 2 under the action of the inclined groove 9 until the roller 6 contacts the surface of the drill rod 2, thereby achieving the guide limit of the drill rod 2. The personnel transport the cooling oil to the inside of the annular oil storage box 71 through the oil inlet pipe in advance, the cooling oil enters the annular oil storage box 71 through the telescopic tube 74, and is transported to the inside of the oil storage frame 72 through the telescopic tube 74. The oil-absorbing sponge 73 can absorb the cooling oil. The annular oil storage box 71, the telescopic tube 74 and the oil storage frame 72 can keep the cooling oil warm so that it can maintain a constant cooling temperature during a drilling operation. The first motor 14 is started, so that the output end of the first motor 14 drives the drill rod 2 to rotate, and the drill bit 3 rotates synchronously to realize the drilling operation. When the drill rod 2 rotates at a high speed, it can drive the roller 6 to rotate synchronously at the top of the L-shaped rod. The roller 6 can rotate during the rotation process. The fixing rod 76 can be driven to rotate synchronously, and when the fixing rod 76 rotates, the squeezing ball 77 can be driven to rotate synchronously. When the squeezing ball 77 rotates and contacts the sleeve on the surface of the U-shaped rod 79, the U-shaped rod 79 can be pushed. At this time, the U-shaped rod 79 drives the squeezing plate 78 to squeeze the oil-absorbing sponge 73. The cooling oil inside the oil-absorbing sponge 73 is squeezed into the inside of the oil outlet pipe 75 and transported to the inside of the roller 6 by the oil outlet pipe 75. The cooling oil enters the inside of the roller 6 to quickly cool the surface of the roller 6. With the high-speed rotation of the roller 6, the cooling oil can overflow to the contact surface between the roller 6 and the drill rod 2 through the overflow hole on the surface, thereby realizing the cooling and lubrication of the contact surface between the roller 6 and the drill rod 2. When the squeezing ball 77 on the fixed rod 76 is not in contact with the sleeve on the surface of the U-shaped rod 79, the U-shaped rod 79 is pushed under the action of the buffer spring 11 to drive the squeezing plate 78 away from the oil-absorbing sponge 73, so that the oil-absorbing sponge 73 rebounds for subsequent use. During the rotation of the roller 6, the intermittent squeezing of the oil-absorbing sponge 73 is controlled, so that cooling oil can be injected into the roller 6, which is convenient for subsequent cooling and lubrication.

[0021] Embodiment 2 Based on Example 1, please refer to Figures 1 to 3 The specific improvements are as follows: A mounting cylinder 15 is fixedly provided on both sides of the annular plate 4, and an adjusting rod 16 is provided inside the mounting cylinder 15 through a second universal ball. An adjusting member 17 for controlling the left and right movement of the adjusting rod 16 is provided at the top of the fixed cylinder 1. The adjusting member 17 includes a cross bar rotatably provided at the top of the fixed cylinder 1 through a fixed frame, and threaded rods 171 are fixedly provided at both ends of the cross bar. A sliding block 173 is threadedly connected to the surface of the threaded rod 171. An electric push rod 172 is fixedly provided on the bottom surface of the sliding block 173, and the protruding end of the electric push rod 172 is fixedly connected to the top of the adjusting rod 16. Rectangular grooves matching the adjusting rod 16 are provided on both sides of the fixed cylinder 1. A second motor 21 is fixedly provided at the top of the fixed cylinder 1 through a fixed shaft, and a first gear 12 is fixedly provided at the output end of the second motor 21 through a coupling. A second gear 13 meshing with the first gear 12 is fixedly provided on the surface of the cross bar. Start the second motor 21, so that the second motor 21 drives the cross bar to rotate through the first gear 12 and the second gear 13. During the rotation of the cross bar, it can drive the threaded rod 171 to rotate synchronously. During the rotation of the threaded rod 171, it can drive the sliding block 173 to move left and right along it. At the same time, the two adjustment rods 16 move synchronously. During the movement, the second universal ball can drive the mounting tube 15 to swing left and right. At the same time, the fixing ring 5 drives the annular plate 4 to swing left and right, thereby realizing the angle adjustment operation of the drill rod 2 and the drill bit 3.

[0022] Embodiment 3 Based on Example 2, please refer to Figure 2 The specific improvements are as follows: The surface of the mounting tube 15 is threadedly connected with a movable ring 18, and the surface of the movable ring 18 is rotatably provided with a mounting ring 19, the top surface of the mounting ring 19 is fixedly provided with an insertion rod 20, and the surface of the annular plate 4 is provided with a plurality of insertion holes adapted to the insertion rod 20; After the rotation position of the annular plate 4 is adjusted, the personnel rotates the movable ring 18, which can make the movable ring 18 push the mounting ring 19 to move in the direction of the annular plate 4, so that the insertion rod 20 is inserted into the insertion hole on the annular plate 4 to fix the annular plate 4 and prevent the annular plate 4 from rotating.

[0023] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary steerable drilling tool, comprising a fixed cylinder (1) and a drill rod (2) rotatably arranged inside the fixed cylinder (1), a drill bit (3) being fixedly arranged at the bottom end of the drill rod (2), characterized in that: A fixing ring (5) is sleeved inside the fixing cylinder (1) and located on the surface of the drill rod (2), and an annular plate (4) is rotatably provided on the surface of the fixing ring (5), a roller (6) is rotatably provided inside the fixing ring (5), and an overflow hole is provided on the surface of the roller (6), a plurality of rollers (6) are provided and are equidistantly distributed on the surface of the drill rod (2) in a surrounding manner, and a driving unit for controlling the rollers (6) to move left and right is provided inside the annular plate (4), and the rollers (6) are controlled by the driving unit to contact the surface of the drill rod (2), thereby guiding and correcting the deviation of the drill rod (2); The top surface of the fixing ring (5) is provided with a lubrication mechanism (7), through which cooling oil is injected into the interior of the roller (6), and the cooling oil is discharged from the overflow hole by the centrifugal force generated when the roller (6) rotates, thereby being used for cooling and lubricating the contact surface between the roller (6) and the drill rod (2).

2. A rotary steerable drilling tool according to claim 1, characterized in that: The driving part comprises a sliding plate (8) slidably arranged inside the fixing ring (5), and one side of the sliding plate (8) is rotatably connected to the bottom surface of the roller (6) via an L-shaped rod. An inclined groove (9) adapted to the sliding plate (8) is provided inside the annular plate (4), and one side of the sliding plate (8) located inside the inclined groove (9) is in the form of an inclined surface.

3. A rotary steerable drilling tool according to claim 2, characterized in that: The interior of the fixed ring (5) is provided with a slide groove matched with the sliding plate (8), and a guide block (10) is fixedly arranged on the inner wall of the slide groove; the surface of the sliding plate (8) is provided with a guide groove matched with the guide block (10), and a buffer spring (11) is fixedly arranged between the guide block (10) and the inner wall of the guide groove.

4. A rotary steerable drilling tool according to claim 1, characterized in that: The lubricating mechanism (7) comprises an annular oil storage box (71) with a support rod arranged on the top surface of the fixing ring (5), an oil storage frame (72) is arranged inside the annular oil storage box (71) and on the top surface of the roller (6), an oil absorption sponge (73) is arranged inside the oil storage frame (72), and an extrusion piece for extruding the oil absorption sponge (73) is arranged on the top surface of the roller (6).

5. A rotary steerable drilling tool according to claim 4, characterized in that: The inner wall of the annular oil storage box (71) is connected to the surface of the oil storage frame (72) via a telescopic tube (74), and the bottom surface of the oil storage frame (72) is rotatably connected to the top surface of the roller (6) via an oil outlet pipe (75).

6. A rotary steerable drilling tool according to claim 5, characterized in that: The extrusion member comprises fixed rods (76) fixedly arranged on both sides of the top surface of the roller (6), and extrusion balls (77) are fixedly arranged on opposite sides of the two fixed rods (76). Extrusion plates (78) are movably arranged on both sides inside the oil storage frame (72), and U-shaped rods (79) are fixedly arranged on opposite sides of the two extrusion plates (78). A sleeve is rotatably arranged on the surface of the U-shaped rod (79), and the surface of the oil storage frame (72) is fixedly connected to the surface of the U-shaped rod (79) via a clamping spring.

7. A rotary steerable drilling tool according to claim 1, characterized in that: A fixing column is arranged on the top surface of the inner wall of the fixing cylinder (1), and a first motor (14) is arranged inside the fixing column via a first universal ball, and the protruding end of the first motor (14) is threadedly connected to the top end of the drill rod (2) via a coupling.

8. A rotary steerable drilling tool according to claim 1, characterized in that: Mounting cylinders (15) are fixedly arranged on both sides of the surface of the fixing ring (5), and an adjustment rod (16) is arranged inside the mounting cylinder (15) via a second universal ball, and an adjustment member (17) for controlling the adjustment rod (16) to move left and right is arranged at the top end of the fixing cylinder (1).

9. A rotary steerable drilling tool according to claim 8, characterized in that: A movable ring (18) is threadedly connected to the surface of the mounting tube (15), and a mounting ring (19) is rotatably provided on the surface of the movable ring (18). An insertion rod (20) is fixedly provided on the top surface of the mounting ring (19), and a plurality of insertion holes matching the insertion rod (20) are provided on the surface of the annular plate (4).

10. A rotary steerable drilling tool according to claim 8, characterized in that: The adjusting member (17) comprises a cross bar rotatably arranged at the top end of the fixing cylinder (1) via a fixing frame, and threaded rods (171) are fixedly arranged at both ends of the cross bar, a sliding block (173) is threadedly connected to the surface of the threaded rod (171), an electric push rod (172) is fixedly arranged on the bottom surface of the sliding block (173), and the protruding end of the electric push rod (172) is fixedly connected to the top end of the adjusting rod (16).

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