A hydraulic pipe disconnect device for wireline coring drilling

Abstract

The utility model relates to the field of rope core drill equipment, disclose a kind of hydraulic screwing and unscrewing drill pipe device for rope core drill, including lower end cap, the top of lower end cap is rotatably connected with outer dynamic ring, the top of outer dynamic ring is fixedly connected with upper end cap, the top of lower end cap is fixedly connected with slip seat positioning sleeve, the inner wall of slip seat positioning sleeve is movably connected with slip seat, the inner wall of outer dynamic ring is fixedly connected with connecting plate, the inner wall of connecting plate is fixedly connected with guide ring, the top of guide ring is provided with extrusion groove, the bottom of guide ring is provided with arc slot, the inner wall of extrusion groove is inserted with slip seat.The utility model in the present application, through hydraulic control outer dynamic ring forward and reverse rotation can be realized the quick splicing and disassembly of drill pipe, without complex manual operation, greatly reduce the labor intensity of driller, significantly improve the overall efficiency of rope core drill operation.

Description

Technical Field

[0001] This utility model relates to the field of wireline coring drilling equipment, and in particular to a hydraulic screw-off device for wireline coring drilling. Background Technology

[0002] Wireline coring is a key operational method in geological exploration, resource exploration, and other fields. The attachment and removal of drill pipes is a core aspect of this operation. Efficient and safe drill pipe unloading devices ensure continuous drilling operations, reduce downtime, and are of significant practical importance for improving exploration efficiency and reducing operating costs. They are also crucial for ensuring the quality and progress of exploration work.

[0003] In existing technologies, the loosening and unloosening of drill pipes mostly rely on manual operation with tools such as wrenches and pipe wrenches, or simple mechanical auxiliary devices. During the operation, multiple drillers need to work together to first locate the drill pipe threads, and then apply torque by manpower or simple machinery to complete the connection and disassembly of the drill pipe. The operation process is cumbersome and depends on human experience.

[0004] The existing technology has the following drawbacks: the drill pipe threads are easily damaged. When operated manually or with simple mechanical assistance, uneven torque application and insufficient drill pipe positioning accuracy can easily lead to thread jamming and wear, which not only shortens the service life of the drill pipe but may also cause operational failures, affecting the continuity and safety of drilling operations. To address these issues, a hydraulic drill pipe unscrewing device for wireline coring drilling is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a hydraulic drill rod unscrewing device for wireline coring drilling, which aims to improve the problem of easy damage to drill rod threads when unscrewing drill rods in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic screw-off and unscrewing device for wireline coring drilling, comprising a lower end cover, an outer moving ring rotatably connected to the top of the lower end cover, an upper end cover fixedly connected to the top of the outer moving ring, a slip seat positioning sleeve fixedly connected to the top of the lower end cover, a slip seat movably connected to the inner wall of the slip seat positioning sleeve, a connecting plate fixedly connected to the inner wall of the outer moving ring, a guide ring fixedly connected to the inner wall of the connecting plate, a compression groove formed at the top of the guide ring, and an arc-shaped groove formed at the bottom of the guide ring.

[0007] As a further description of the above technical solution:

[0008] The locking seat is inserted into the inner wall of the extrusion groove.

[0009] As a further description of the above technical solution:

[0010] The locking seat is inserted into the inner wall of the arc-shaped groove.

[0011] As a further description of the above technical solution:

[0012] The locking seat is provided in two sets, and the two sets of locking seats are arranged symmetrically.

[0013] As a further description of the above technical solution:

[0014] The bottom end of the upper cover contacts the top end of the locking seat.

[0015] As a further description of the above technical solution:

[0016] The inner wall of the connecting plate is in contact with the outer wall of the locking seat.

[0017] This utility model has the following beneficial effects:

[0018] 1. In this utility model, the drill rod can be quickly connected and disconnected by hydraulically controlling the forward and reverse rotation of the outer moving coil, without the need for complicated manual operation, which greatly reduces the labor intensity of drillers and significantly improves the overall efficiency of wireline coring drilling operations.

[0019] 2. In this utility model, the clamping mechanism can float freely up and down with the drill rod. Combined with the precise clamping of the wedge-shaped guide ring and the forced release design of the guide sleeve, it can effectively avoid damage to the drill rod threads caused by jamming or uneven force, thus ensuring the service life of the drill rod and operational safety. Attached Figure Description

[0020] Figure 1 This utility model presents a schematic diagram showing the upper end cover and outer moving coil of a hydraulic drill rod unscrewing device for wireline coring drilling.

[0021] Figure 2 This is an exploded view of the upper end cover and outer moving ring of a hydraulic screw-off device for wireline coring drilling proposed in this utility model.

[0022] Figure 3 This is a detailed anatomical view of the outer moving ring and connecting rod of a hydraulic drill rod unscrewing device for wireline coring drilling proposed in this utility model;

[0023] Figure 4 This is a detailed anatomical view of the connecting plate and the slip seat positioning sleeve of a hydraulic drill rod unscrewing device for wireline coring drilling proposed in this utility model.

[0024] Figure 5 This is an exploded view of the extrusion groove and slip seat of a hydraulic screw-off device for wireline coring drilling proposed in this utility model;

[0025] Figure 6This is a schematic diagram of the arc-shaped groove of a hydraulic screw-off device for wireline coring drilling proposed in this utility model.

[0026] Legend:

[0027] 1. Upper end cover; 2. Outer moving ring; 3. Lower end cover; 4. Vase seat; 5. Vase seat positioning sleeve; 6. Connecting plate; 7. Guide ring; 8. Extrusion groove; 9. Arc groove. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Reference Figures 1-3 This utility model provides an embodiment of a hydraulic drill rod unloading device for wireline coring drilling, comprising a lower end cover 3. The lower end cover 3 serves as the bottom support structure of the device, providing not only sealing and protection but also a stable installation reference for other components. An outer moving ring 2 is rotatably connected to the top of the lower end cover 3. The outer moving ring 2 can rotate flexibly around the central axis of the lower end cover 3, and its rotational power is transmitted by the drilling rig's slewing bearing. It is the core power component driving the internal clamping mechanism. An upper end cover 1 is fixedly connected to the top of the outer moving ring 2, and the upper end cover 1 and the outer moving ring 2 are fastened together by bolts. A sealing gasket is provided at the connection to ensure the internal sealing of the device and prevent hydraulic oil leakage or impurities from entering. The lower end cover 3... The top of the outer rotating ring 2 is fixedly connected to a slip seat positioning sleeve 5. The inner wall of the slip seat positioning sleeve 5 is movably connected to a slip seat 4. The slip seat 4 can achieve radial extension and retraction and vertical sliding within the limited range of the slip seat positioning sleeve 5. By cooperating with the guide structure, the drill rod can be clamped and released. The inner wall of the outer rotating ring 2 is fixedly connected to a connecting plate 6. The inner wall of the connecting plate 6 is fixedly connected to a guide ring 7. The connecting plate 6 is fixed to the preset mounting hole on the inner wall of the outer rotating ring 2 by screws, which serves as a bridge connecting the outer rotating ring 2 and the guide ring 7. The top of the guide ring 7 is provided with a pressing groove 8 and the bottom of the guide ring 7 is provided with an arc groove 9. By pressing the slip seat 4 with the pressing groove 8 and the arc groove 9, the clamping and releasing of the rotating rod can be completed.

[0030] Reference Figures 4-6The slip seat 4 is inserted into the inner wall of the extrusion groove 8 and the inner wall of the arc groove 9. The end of the slip seat 4 is tightly fitted with the wedge-shaped surfaces of the extrusion groove 8 and the arc groove 9. When the guide ring 7 rotates with the outer moving ring 2, the extrusion groove 8 can push the slip seat 4 to move radially through the inclined extrusion. There are two sets of slip seats 4, which are symmetrically arranged. The symmetrical layout facilitates processing, assembly and later maintenance, and reduces the difficulty of component replacement. The bottom end of the upper end cover 1 contacts the top end of the slip seat 4. The upper end cover 1 plays a limiting and protective role for the top end of the slip seat 4, preventing the slip seat 4 from floating upward and leaving the preset movement range. The inner wall of the connecting plate 6 contacts the outer wall of the slip seat 4. The inner wall of the connecting plate 6 provides lateral support for the slip seat 4, preventing the slip seat 4 from shifting during radial movement and ensuring coaxiality when clamping the drill rod.

[0031] Working Principle: During operation, the operator first needs to securely install the device on the upper part of the mast hole holder of the fully hydraulic drilling rig, ensuring overall installation accuracy and operational stability. When additional drill rods are needed, the drilling rig's winch mechanism will lift the drill rod to be added and precisely insert it into the center position of the device, while aligning it with the existing drill rod threads in the lower hole to ensure the connection reference is aligned. Next, the operator needs to operate the hydraulic handle to control the outer moving ring 2 to rotate forward. Under the power transmission of the drilling rig's slewing support, the outer moving ring 2 will rotate around the central axis of the lower end cover 3, which in turn drives the guide ring 7 to rotate synchronously through the connecting plate 6. At this time, the extrusion groove 8 at the top of the guide ring 7 is tightly fitted with the end of the slip seat 4. As the guide ring 7 rotates forward, the extrusion groove... 8. The wedge-shaped inclined surface pushes the slip seat 4 to move radially inward along the inner wall of the slip seat positioning sleeve 5 until the slip seat 4 firmly clamps the drill rod. The friction generated by the continuous rotation will drive the slip seat 4 to rotate synchronously in the forward direction, thereby driving the drill rod to rotate, so that the threads of the upper and lower drill rods can be smoothly screwed into the connection. During the connection process, the upper drill rod gradually moves downward. With the cooperation of the connecting plate 6, the slip seat 4 floats up and down along the slip seat positioning sleeve 5, always in contact with the drill rod and moves down with it until the drill rod is completely tightened. After the connection is completed, the outer moving ring 2 is rotated in the opposite direction by about 90°. The guide ring 7 moves accordingly. Through the arc groove 9 at the bottom of the guide ring 7, the slip seat 4 is forced to move radially outward, thereby releasing the drill rod without affecting the subsequent normal rotation operation of the drill rod.

[0032] When it is necessary to disassemble the drill pipe, the operation process is completely reversed from that of adding the drill pipe. The operator needs to operate the hydraulic handle to make the outer moving ring 2 rotate in the opposite direction. At this time, the arc groove 9 on the guide ring 7 will push the slip seat 4 to clamp the drill pipe inward. Continue to rotate in the opposite direction to drive the drill pipe to rotate and unscrew the threads. As the threads gradually loosen, the upper drill pipe moves upward, and the slip seat 4 will float upward synchronously along the slip seat positioning sleeve 5, effectively avoiding damage to the drill pipe threads due to jamming. The whole process reduces the labor intensity of the driller and greatly improves the work efficiency.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulically operated drill rod unloading device for wireline coring drilling, comprising a lower end cap (3), characterized in that: The top of the lower end cover (3) is rotatably connected to an outer moving ring (2), the top of the outer moving ring (2) is fixedly connected to an upper end cover (1), the top of the lower end cover (3) is fixedly connected to a locking seat positioning sleeve (5), the inner wall of the locking seat positioning sleeve (5) is movably connected to a locking seat (4), the inner wall of the outer moving ring (2) is fixedly connected to a connecting plate (6), the inner wall of the connecting plate (6) is fixedly connected to a guide ring (7), the top of the guide ring (7) is provided with an extrusion groove (8), and the bottom of the guide ring (7) is provided with an arc groove (9).

2. The hydraulic drill rod unscrewing device for wireline coring drilling according to claim 1, characterized in that: The locking seat (4) is inserted into the inner wall of the extrusion groove (8).

3. The hydraulic drill rod unscrewing device for wireline coring drilling according to claim 1, characterized in that: The locking seat (4) is inserted into the inner wall of the arc-shaped groove (9).

4. A hydraulic drill rod unscrewing device for wireline coring drilling according to claim 1, characterized in that: The slip seat (4) is provided in two sets, and the two sets of slip seats (4) are arranged symmetrically.

5. A hydraulic drill rod unscrewing device for wireline coring drilling according to claim 1, characterized in that: The bottom end of the upper cover (1) is in contact with the top end of the clasp (4).

6. A hydraulic drill rod unscrewing device for wireline coring drilling according to claim 1, characterized in that: The inner wall of the connecting plate (6) is in contact with the outer wall of the locking seat (4).

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