Link-type drill pipe steering mechanism

Abstract

The application discloses a connecting rod type drill rod steering mechanism, which comprises a longitudinal reciprocating motion assembly, a transverse driving assembly, a transmission assembly and a bendable assembly. The longitudinal reciprocating motion assembly is installed in the bendable assembly, the transverse driving assembly is arranged on the longitudinal reciprocating motion assembly, the power output end of the transverse driving assembly is in transmission connection with the power input end of the transmission assembly, and the power output end of the transmission assembly is fixedly connected with the bending end of the bendable assembly. According to the application, the driving assembly is arranged to drive the sliding plate to move longitudinally, the guide groove is utilized to drive the guide shaft to move transversely, the transverse movement of the guide shaft can drive the first transmission plate and the second transmission plate to rotate, and then the first steering cylinder and the second steering cylinder are bent, so that the drill rod and the drill bit are driven to steer. The steering angle, time and direction can be controlled by the ground operator, and the drilling with a small turning radius can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering drilling, in particular to a connecting rod type drill rod steering mechanism. BACKGROUND

[0002] In engineering drilling, the conventional construction is generally to directly drill a hole by using a drill rod, and the drill rod is a rigid straight rod, and the hole drilled by the drill rod is a straight hole or a hole with a large steering radius. However, in the actual construction environment, sometimes a hole with a small steering radius is needed, and the existing drill rod cannot meet the steering requirement, so the small steering radius drilling construction cannot be carried out. SUMMARY

[0003] Therefore, the technical problem to be solved by the present application is to provide a connecting rod type drill rod steering mechanism capable of driving the drill rod to steer and controlling the steering angle.

[0004] To solve the above technical problem, the present application provides the following technical scheme: a connecting rod type drill rod steering mechanism, comprising a longitudinal reciprocating motion assembly, a transverse driving assembly, a transmission assembly and a bendable assembly, the longitudinal reciprocating motion assembly is installed in the bendable assembly, the transverse driving assembly is arranged on the longitudinal reciprocating motion, the power output end of the transverse driving assembly is in transmission connection with the power input end of the transmission assembly, and the power output end of the transmission assembly is fixedly connected with the bending end of the bendable assembly; the transverse motion assembly drives the end of the bendable assembly to bend through the driving transmission assembly.

[0005] The connecting rod type drill rod steering mechanism, the bendable assembly comprises a fixed cylinder, a first steering cylinder and a second steering cylinder, the inner wall of the fixed cylinder is fixedly connected with a hinge shaft at both ends, the inner wall of the first steering cylinder is fixedly connected with a hinge seat at the second end, and the inner wall of the second steering cylinder is fixedly connected with a hinge seat at the first end, the hinge seat of the second end of the first steering cylinder is hinged with the hinge shaft of the first end of the fixed cylinder, and the hinge seat of the first end of the second steering cylinder is hinged with the hinge shaft of the second end of the connecting cylinder; the axes of the fixed cylinder, the first steering cylinder and the second steering cylinder coincide, and the hinge shafts at both ends of the fixed cylinder are parallel to each other.

[0006] The connecting rod type drill pipe steering mechanism, the two ends of the fixed cylinder, the second end of the first steering cylinder and the first end of the second steering cylinder are provided with chamfered surfaces, the chamfered surfaces of the two ends of the fixed cylinder, the second end of the first steering cylinder and the first end of the second steering cylinder are the same in structure; the chamfered surface of the first end of the fixed cylinder is coincident with the axis of the hinge shaft on one side, and is close to the center of the axial length of the fixed cylinder on the other side; the chamfered surface of the first end of the second steering cylinder is coincident with the axis of the hinge seat on one side, and is close to the center of the axial length of the second steering cylinder on the other side; the chamfered surface of the first end of the fixed cylinder is mirror-symmetrical with the chamfered surface of the second end of the first steering cylinder about the axis of the hinge shaft of the first end of the fixed cylinder, and the chamfered surface of the second end of the fixed cylinder is mirror-symmetrical with the chamfered surface of the first end of the second steering cylinder about the axis of the hinge shaft of the second end of the fixed cylinder.

[0007] The connecting rod type drill pipe steering mechanism, the longitudinal reciprocating motion assembly comprises two linear guide rails, a sliding plate and a driving assembly, the two vertical surfaces of the sliding plate are provided with linear sliding grooves along the length direction, the two linear guide rails are respectively slidably connected in the linear sliding grooves on the two vertical surfaces of the sliding plate, and the power output end of the driving mechanism is drivingly connected with the first end of the sliding plate.

[0008] The connecting rod type drill pipe steering mechanism, the transverse driving assembly comprises a guide groove and a guide shaft, the guide shaft is slidably connected in the guide groove, the guide groove is provided on the front surface of the sliding plate of the longitudinal reciprocating motion assembly, the center points of the two ends of the guide groove are located on the diagonal lines of the front surface of the sliding plate, the first end of the guide groove is close to the first end of the sliding plate, and the second end of the guide groove is close to the second end of the sliding plate.

[0009] The connecting rod type drill pipe steering mechanism, the transmission assembly comprises a first transmission plate and a second transmission plate, the first transmission plate and the second transmission plate are the same in structure, one end of the first transmission plate is provided with a transmission hole, the transmission hole is a waist-shaped hole, the other end of the first transmission plate is provided with a hinge hole, the hinge hole of the first transmission plate is hingedly connected with the hinge shaft of the second end of the fixed cylinder of the bendable assembly, the side wall of the first transmission plate is fixedly connected with the side wall of the hinge seat of the first end of the second steering cylinder of the bendable assembly, the hinge hole of the second transmission plate is hingedly connected with the hinge shaft of the first end of the fixed cylinder of the bendable assembly, and the side wall of the second transmission plate is fixedly connected with the side wall of the hinge seat of the second end of the first steering cylinder of the bendable assembly, and the guide shaft of the transverse driving assembly penetrates through the transmission holes of the first transmission plate and the second transmission plate.

[0010] The first transmission plate and the second transmission plate are mirror symmetric about the guide shaft axis of the transverse driving assembly.

[0011] The technical scheme of the present application has the following beneficial technical effects:

[0012] 1、The present application drives the sliding plate to move longitudinally through the driving assembly, drives the guide shaft to move transversely through the guide groove, drives the first transmission plate and the second transmission plate to rotate through the transverse movement of the guide shaft, and further drives the first steering cylinder and the second steering cylinder to bend, so as to realize steering of the drill pipe and the drill bit, and the angle, time and direction of the steering can be controlled by the ground operator, which has high controllability and realizes drilling with a small turning radius.

[0013] 2、The present application drives the guide shaft to move transversely through the longitudinal movement of the guide groove, has a clever structure design, the guide groove is obliquely arranged as a whole and has a length greater than the transverse movement distance of the guide shaft, can play a role of torque amplification when the guide groove drives the guide shaft to move, and the whole is a power arm when the transmission plate moves, further amplifies the torque, can smoothly drive the steering cylinder to move, improves the stability of the movement, and after the guide groove moves a certain distance, the moving distance of the first transmission plate and the second transmission plate is small, so as to realize accurate control. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The present application has the following beneficial technical effects:

[0015] Figure 2 The present application has the following beneficial technical effects:

[0016] Figure 3 The present application has the following beneficial technical effects:

[0017] Figure 4 The present application has the following beneficial technical effects:

[0018] The figure mark is represented as: 1-fixed cylinder;2-first steering cylinder;3-second steering cylinder;4-linear guide rail;5-sliding plate;6-guide groove;7-linear sliding groove;8-hinge shaft;9-first transmission plate;10-guide shaft;11-driving assembly;12-second transmission plate;13-transmission hole;14-hinge hole;15-oblique surface. DETAILED DESCRIPTION

[0019] Please refer to Figure 1The application discloses a connecting rod type drill rod steering mechanism, which comprises a longitudinal reciprocating motion assembly, a transverse driving assembly, a transmission assembly and a bendable assembly, the longitudinal reciprocating motion assembly is installed in the bendable assembly, the bendable assembly comprises a fixed cylinder 1, a first steering cylinder 2 and a second steering cylinder 3, the inner wall of the fixed cylinder 1 is fixedly connected with a hinge shaft 8 at both ends, the inner wall of the second end of the first steering cylinder 2 and the inner wall of the first end of the second steering cylinder 3 are fixedly connected with a hinge seat, the hinge seat of the second end of the first steering cylinder 2 is hinged with the hinge shaft 8 of the first end of the fixed cylinder 1, and the hinge seat of the first end of the second steering cylinder 3 is hinged with the hinge shaft 8 of the second end of the connecting cylinder; the axes of the fixed cylinder 1, the first steering cylinder 2 and the second steering cylinder 3 coincide, and the hinge shafts 8 at both ends of the fixed cylinder 1 are parallel to each other; the transmission assembly comprises a first transmission plate 9 and a second transmission plate 12, the first transmission plate 9 and the second transmission plate 12 are the same in structure, one end of the first transmission plate 9 is provided with a transmission hole 13, the transmission hole 13 is a waist-shaped hole, and the other end of the first transmission plate 9 is provided with a hinge hole 14; the hinge hole 14 of the first transmission plate 9 is hinged with the hinge shaft 8 of the second end of the fixed cylinder 1 of the bendable assembly, and the side wall of the first transmission plate 9 is fixedly connected with the side wall of the hinge seat of the first end of the second steering cylinder 3 of the bendable assembly, the hinge hole 14 of the second transmission plate 12 is hinged with the hinge shaft 8 of the first end of the fixed cylinder 1 of the bendable assembly, and the side wall of the second transmission plate 12 is fixedly connected with the side wall of the hinge seat of the second end of the first steering cylinder 2 of the bendable assembly, the guide shaft 10 of the transverse driving assembly penetrates through the transmission hole 13 of the first transmission plate 9 and the transmission hole 13 of the second transmission plate 12, the first transmission plate 9 and the second transmission plate 12 are mirror-symmetric about the axis of the guide shaft 10 of the transverse driving assembly, the driving assembly 11 is arranged to drive the sliding plate 5 to move longitudinally, the guide groove 6 is utilized to drive the guide shaft 10 to move transversely, the transverse movement of the guide shaft 10 can drive the first transmission plate 9 and the second transmission plate to rotate, and then the first steering cylinder 2 and the second steering cylinder 3 are bent, so that the drill rod and the drill bit are driven to steer, the steering angle, time and direction can be controlled by ground operators, the steering mechanism has high controllability and realizes drilling with a small turning radius. The transverse driving assembly is arranged on the longitudinal reciprocating motion assembly, the longitudinal reciprocating motion assembly comprises two linear guides 4, a sliding plate 5 and a driving assembly 11, the linear sliding grooves 7 are formed in the vertical surfaces of the two sides of the sliding plate 5 along the length direction, the two linear guides 4 are slidably connected in the linear sliding grooves 7 on the two sides of the sliding plate 5, and the power output end of the driving mechanism is drivingly connected with the first end of the sliding plate 5; the linear guides 4 are fixedly connected with the inner side wall of the fixed cylinder 1 of the bendable assembly, and the fixed end of the driving assembly 11 is fixedly connected with the inner side wall of the fixed cylinder 1 of the bendable assembly; the transverse driving assembly comprises a guide groove 6 and a guide shaft 10, as Figure 2As shown, the guide shaft 10 is slidingly connected in the guide groove 6 which is opened on the front face of the slide plate 5 of the longitudinal reciprocating assembly, the center points of both ends of the guide groove 6 are located on the diagonal line of the front face of the slide plate 5, the first end of the guide groove 6 is close to the first end of the slide plate 5, and the second end of the guide groove 6 is close to the second end of the slide plate 5, the longitudinal movement of the guide groove 6 drives the lateral movement of the guide shaft 10, the structure is ingenious, the guide groove 6 is obliquely arranged as a whole, and the length of the guide groove 6 is greater than the lateral movement distance of the guide shaft 10, when the guide groove 6 drives the movement of the guide shaft 10, the guide groove 6 can play a role of torque amplification, and the whole is a power arm when the transmission plate moves, further amplifying the torque, smoothly driving the movement of the steering cylinder, improving the stability of the movement, and after the guide groove 6 moves a certain distance, the moving distance of the first transmission plate 9 and the second transmission plate 12 is small, so as to realize accurate control.

[0020] As shown in Figure 3 As shown, the fixed cylinder 1, the second end of the first steering cylinder 2 and the first end of the second steering cylinder 3 are all provided with chamfers 15, the chamfers 15 at both ends of the fixed cylinder 1, the chamfer 15 at the second end of the first steering cylinder 2 and the chamfer 15 at the first end of the second steering cylinder 3 are the same in structure; one side of the chamfer 15 at the first end of the fixed cylinder 1 coincides with the axis of the hinge shaft 8, the other side of the chamfer 15 at the first end of the fixed cylinder 1 is close to the center of the axial length of the fixed cylinder 1, one side of the chamfer 15 at the first end of the second steering cylinder 3 coincides with the axis of the hinge seat at the end of the second steering cylinder 3, and the other side of the chamfer 15 at the first end of the second steering cylinder 3 is close to the center of the axial length of the second steering cylinder 3; the chamfer 15 at the first end of the fixed cylinder 1 is mirror-symmetrical about the axis of the hinge shaft 8 at the first end of the fixed cylinder 1 with the chamfer 15 at the second end of the first steering cylinder 2, and the chamfer 15 at the second end of the fixed cylinder 1 is mirror-symmetrical about the axis of the hinge shaft 8 at the second end of the fixed cylinder 1 with the chamfer 15 at the first end of the second steering cylinder 3.

[0021] Workflow: In the actual drilling operation, the driving assembly 11 is selected by a ball screw pair driving, the length of the screw rod is equal to or greater than the stroke length of the sliding plate 5, and the support seat at both ends of the screw rod is fixed with the inner wall of the fixed cylinder 1. The end of the screw rod is in driving connection with the driving motor, the nut of the ball screw pair is fixed with the end of the sliding plate 5, the first steering cylinder 2 is connected with the ground equipment through the drill pipe, the second steering cylinder 3 is connected with the drilling components such as the power drill bit, in the initial state, the axes of the fixed cylinder 1, the first steering cylinder 2 and the second steering cylinder 3 coincide, the guide shaft 10 is located at one end of the guide groove 6, and the straight-line drilling is realized when drilling downward; when turning drilling is needed, the sliding plate 5 is driven by the driving assembly 11 to move linearly, under the action of the guide groove 6, the guide shaft 10 is pushed to move along the direction of the guide groove 6, so that the guide shaft 10 moves transversely, the transmission holes 13 of the first transmission plate 9 and the second transmission plate 12 move transversely to one side, the first transmission plate 9 rotates along the axis of the hinge hole 14 end, and drives the second steering cylinder 3 to rotate along the hinge shaft 8 axis, the second transmission plate 12 rotates along the axis of the hinge hole 14 end, and drives the first steering cylinder 2 to rotate along the hinge shaft 8 axis, under the cooperation of the fixed cylinder 1, the first steering cylinder 2 and the second steering cylinder 3, the curved steering is realized, the drill bit is steered, and the purpose of turning drilling is achieved.

[0022] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation of the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the patent application claims.

Claims

1. A linkage-type drill pipe steering mechanism, characterized by, The application relates to a longitudinal reciprocating motion assembly, a transverse driving assembly, a transmission assembly and a bendable assembly, wherein the longitudinal reciprocating motion assembly is installed in the bendable assembly, the transverse driving assembly is arranged on the longitudinal reciprocating motion assembly, the power output end of the transverse driving assembly is in transmission connection with the power input end of the transmission assembly, and the power output end of the transmission assembly is fixedly connected with the bending end of the bendable assembly; the transverse driving assembly drives the end of the bendable assembly to bend through the driving transmission assembly. The bendable assembly comprises a fixed cylinder (1), a first turning cylinder (2) and a second turning cylinder (3), the inner wall of the fixed cylinder (1) is fixedly connected with hinged shafts (8) at both ends, the inner wall of the second end of the first turning cylinder (2) and the inner wall of the first end of the second turning cylinder (3) are fixedly connected with hinged seats, the hinged seat of the second end of the first turning cylinder (2) is hinged with the hinged shaft (8) of the first end of the fixed cylinder (1), and the hinged seat of the first end of the second turning cylinder (3) is hinged with the hinged shaft (8) of the second end of the connecting cylinder; the axes of the fixed cylinder (1), the first turning cylinder (2) and the second turning cylinder (3) coincide, and the hinged shafts (8) at both ends of the fixed cylinder (1) are parallel to each other. The longitudinal reciprocating motion assembly comprises two linear guide rails (4), a sliding plate (5) and a driving assembly (11), linear sliding grooves (7) are formed in the vertical surfaces of the two sides of the sliding plate (5) along the length direction, the two linear guide rails (4) are slidingly connected in the linear sliding grooves (7) on the two sides of the sliding plate (5) respectively, and the power output end of the driving assembly is drivingly connected with the first end of the sliding plate (5); the linear guide rails (4) are fixedly connected with the inner side wall of the fixed cylinder (1) of the bendable assembly, and the fixed end of the driving assembly (11) is fixedly connected with the inner side wall of the fixed cylinder (1) of the bendable assembly. The transverse driving assembly comprises a guide groove (6) and a guide shaft (10), the guide shaft (10) is slidingly connected in the guide groove (6), the guide groove (6) is formed on the front surface of the sliding plate (5) of the longitudinal reciprocating motion assembly, the center points of the two ends of the guide groove (6) are located on the diagonal line of the front surface of the sliding plate (5), the first end of the guide groove (6) is close to the first end of the sliding plate (5), and the second end of the guide groove (6) is close to the second end of the sliding plate (5).

2. The connecting rod style drill pipe steering mechanism of claim 1, wherein, The fixed cylinder (1) is provided with a chamfer (15) at both ends, the second end of the first steering cylinder (2) and the first end of the second steering cylinder (3), the chamfers (15) at both ends of the fixed cylinder (1), the chamfer (15) at the second end of the first steering cylinder (2) and the chamfer (15) at the first end of the second steering cylinder (3) are of the same structure; the chamfer (15) at the first end of the fixed cylinder (1) is coincident with the axis of the hinge shaft (8) on one side, the other side of the chamfer (15) at the first end of the fixed cylinder (1) is close to the center of the axial length of the fixed cylinder (1), the chamfer (15) at the first end of the second steering cylinder (3) is coincident with the axis of the hinge seat at the end of the second steering cylinder (3) on one side, the other side of the chamfer (15) at the first end of the second steering cylinder (3) is close to the center of the axial length of the second steering cylinder (3); the chamfer (15) at the first end of the fixed cylinder (1) is mirror-symmetrical to the chamfer (15) at the second end of the first steering cylinder (2) about the axis of the hinge shaft (8) at the first end of the fixed cylinder (1), and the chamfer (15) at the second end of the fixed cylinder (1) is mirror-symmetrical to the chamfer (15) at the first end of the second steering cylinder (3) about the axis of the hinge shaft (8) at the second end of the fixed cylinder (1).

3. The connecting rod style drill pipe steering mechanism of claim 1, wherein, The transmission assembly comprises a first transmission plate (9) and a second transmission plate (12), the first transmission plate (9) and the second transmission plate (12) are of the same structure, one end of the first transmission plate (9) is provided with a transmission hole (13), the transmission hole (13) is a waist-shaped hole, the other end of the first transmission plate (9) is provided with a hinge hole (14); the hinge hole (14) of the first transmission plate (9) is hinged with the hinge shaft (8) at the second end of the fixed cylinder (1) of the bendable assembly, and the side wall of the first transmission plate (9) is fixedly connected with the hinge seat side wall at the first end of the second steering cylinder (3) of the bendable assembly, the hinge hole (14) of the second transmission plate (12) is hinged with the hinge shaft (8) at the first end of the fixed cylinder (1) of the bendable assembly, and the side wall of the second transmission plate (12) is fixedly connected with the hinge seat side wall at the second end of the first steering cylinder (2) of the bendable assembly, the guide shaft (10) of the transverse driving assembly passes through the transmission hole (13) of the first transmission plate (9) and the transmission hole (13) of the second transmission plate (12).

4. The connecting rod style drill pipe steering mechanism of claim 3, wherein, The first transmission plate (9) and the second transmission plate (12) are mirror-symmetrical about the axis of the guide shaft (10) of the transverse driving assembly.

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