Drill rod fishing tool

Abstract

The utility model relates to a drill rod fishing tool, which belongs to the technical field of drill rod fishing and comprises a fishing rod, a rotating plate fixedly mounted at one end of the fishing rod, a fixed pipe rotatably mounted on the surface of the rotating plate, a top plate fixedly mounted at one end of the fixed pipe and an inner support component arranged on the top plate and used for being supported in a drill rod to clamp the drill rod. According to the drill rod fishing tool, the retractable inner supporting assembly is arranged on one side of the top plate, the fishing rod is rotated to drive an outer supporting plate of the inner supporting assembly to retract, the outer supporting plate extends into a drill rod, then the outer supporting plate is unfolded and supported in the drill rod, the drill rod is clamped outwards, and the drill rod is conveniently fished out of a drilled well; the problems that the external supporting force of the self-locking structure in the structure comes from a spring, the elastic force of the spring needs to be large enough to support the residual drill rod, and the self-locking structure needs to extend into the residual drill rod with large force due to the fact that the elastic force is too large are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drill rod salvaging, in particular to a drill rod salvaging tool. Background Art

[0002] Deep hole drilling is a necessary technology in mining. Multiple drill pipes are connected by threads to transmit torque and motion. Drill pipe is a steel pipe with threads at the tail. It is mainly used for horizontal drilling or for the convenience of drilling. It is widely used in mining, agriculture, oil and gas industry and other fields. Its hollow shape allows drilling fluid to be pumped into the well through the drill bit and returned to the annulus. The drill pipe is only a part of the entire drill string, which includes the bottom hole assembly and drill pipe. Tool joints are used to connect each part of the drill pipe installed at both ends.

[0003] Drill drop is one of the most common accidents in deep hole drilling. When the drill rod in the hole breaks somewhere, a large amount of drilling tools are left in the hole, which is difficult to remove. This not only causes the loss of drilling tools, but also causes the waste of drilling work and serious economic losses. Therefore, it is necessary to remove the drilling tools left in the hole.

[0004] Chinese patent CN114991695B discloses a self-locking drill pipe salvage tool, which realizes reliable connection with the residual drill tool by setting a self-locking buckle structure, and facilitates the salvage tool to smoothly enter the salvaged object by setting a guide thread cone to clean the residual damaged opening of the drill tool, thereby realizing efficient and reliable salvage of the residual drill tool, and solving the problem of difficulty in salvaging the drill tool caused by factors such as high hardness of the residual drill tool, possible self-rotation of the residual drill tool, and high hardness and low toughness of the salvage tool.

[0005] However, the external support force of the self-locking structure in this structure comes from the spring. The elastic force of the spring needs to be large enough to support the remaining drill rod. If the elastic force is too large, a large force is required to extend the self-locking structure into the remaining drill rod. In view of this, the present application proposes a drill rod salvage tool. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a drill rod salvage tool, which has the advantages of facilitating the insertion of an internal support assembly into the broken drill rod to support and grasp the drill rod, and solves the problem that the external support force of the self-locking buckle structure in the structure comes from a spring, and the elastic force of the spring needs to be large enough to support the remaining drill rod, but excessive elastic force requires a large force to insert the self-locking buckle structure into the remaining drill rod.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drill rod salvaging tool, comprising a salvaging rod, a rotating plate fixedly mounted at one end of the salvaging rod, a fixed tube rotatably mounted on the surface of the rotating plate, a top plate fixedly mounted at one end of the fixed tube, and an inner support assembly arranged on the top plate for supporting the drill rod to clamp the drill rod, wherein one side of the top plate is provided with four slide grooves;

[0008] The inner support assembly comprises a sliding block slidably mounted inside the sliding groove, a sliding base fixedly mounted on one side of the sliding block, and an outer support plate fixedly mounted on one side of the sliding base.

[0009] The present application adopts the above-mentioned technical solution. When the inner support assembly is extended into the broken drill rod, the outer support plate is retracted so that the outer support plate can be easily extended into the drill rod, making it easier for the inner support assembly to enter the drill rod without using great force.

[0010] Furthermore, a limiting block is fixedly installed on a side of the sliding block away from the sliding base, and the limiting block is located on a side of the top plate on which the fixed tube is installed.

[0011] The beneficial effect of adopting the above further solution is that the sliding block is clamped in the sliding groove by the sliding base and the limit block, so that the sliding base will not separate from the top plate when moving.

[0012] Furthermore, an anti-skid rubber is fixedly installed on the outer side of the outer support plate, and the curvature of the outer support plate is equal to the inner curvature of the drill rod.

[0013] The beneficial effect of adopting the above further solution is that the anti-skid rubber contacts the inner wall of the drill rod, thereby increasing the friction between the outer support plate and the drill rod.

[0014] Furthermore, an annular clamping block is fixedly mounted on the surface of the rotating plate, and an annular clamping groove matching the annular clamping block is formed on the inner side wall of the fixed tube.

[0015] The beneficial effect of adopting the above further solution is that the rotating plate can only rotate inside the fixed tube but cannot slide, and the position of the rotating plate is clamped in the annular clamping groove.

[0016] Furthermore, a sliding tube is slidably mounted on the inner side wall of the fixed tube, a clamping strip is fixedly mounted on the inner side wall of the fixed tube, a sliding clamping groove matching the clamping strip is opened on the surface of the sliding tube, and an end plate is fixedly mounted on one end of the sliding tube.

[0017] The beneficial effect of adopting the above further solution is that the sliding tube can only slide inside the fixed tube but cannot rotate.

[0018] Furthermore, an ear seat is fixedly installed on the inner side of the outer support plate, and an ear seat is fixedly installed on the surface of the sliding tube. The two ear seats are connected by a connecting rod, and both ends of the connecting rod are rotatably connected to the ear seats respectively.

[0019] The beneficial effect of adopting the above further solution is that the sliding tube slides inside the fixed tube, driving one end of the connecting rod to move, thereby expanding the outer support plate outward or contracting it inward.

[0020] Furthermore, a connecting shaft is fixedly installed on one side of the rotating plate away from the salvage rod, and a threaded head is fixedly installed on one end of the connecting shaft extending into the interior of the sliding tube, and the threaded head is threadedly connected to the sliding tube.

[0021] The beneficial effect of adopting the above further scheme is: rotating the fishing rod drives the rotating plate to rotate, drives the connecting shaft to rotate, drives the threaded head to rotate, so that the sliding tube slides inside the fixed tube, and drives the outer support plate to expand outward or shrink inward.

[0022] Compared with the prior art, the utility model provides a drill rod fishing tool, which has the following beneficial effects:

[0023] The drill rod salvage tool is provided with a retractable inner support assembly on one side of the top plate, and the outer support plate of the inner support assembly is driven to retract by rotating the salvage rod, and the outer support plate is extended into the drill rod, and then the outer support plate is expanded and supported inside the drill rod, and the drill rod is clamped outward to facilitate the salvage of the drill rod out of the well, thereby solving the problem that the outer support force of the self-locking buckle structure in the structure comes from the spring, and the elastic force of the spring needs to be large enough to support the remaining drill rod, but the excessive elastic force requires a large force to extend the self-locking buckle structure into the remaining drill rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 This is an expanded view of the inner support assembly of the utility model;

[0026] Figure 3 It is a side sectional view of the structure of the utility model;

[0027] Figure 4 It is a three-dimensional schematic diagram of the inner support assembly of the utility model.

[0028] In the figure: 1. fishing rod; 2. rotating plate; 3. fixed pipe; 4. top plate; 41. slide groove; 5. inner support assembly; 51. slider; 511. limit block; 52. sliding base; 53. outer support plate; 531. anti-slip rubber; 6. sliding pipe; 7. end plate; 8. ear seat; 9. connecting rod; 10. connecting shaft; 11. threaded head. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-4 A drill rod salvage tool in this embodiment includes a salvage rod 1, a rotating plate 2 fixedly installed at one end of the salvage rod 1, a fixed tube 3 rotatably installed on the surface of the rotating plate 2, a top plate 4 fixedly installed at one end of the fixed tube 3, and an inner support assembly 5 arranged on the top plate 4 for supporting the drill rod to clamp the drill rod inside. Four slide grooves 41 are opened on one side of the top plate 4.

[0031] At the same time, an annular block is fixedly installed on the surface of the rotating plate 2, and an annular groove matching the annular block is provided on the inner wall of the fixed tube 3. The rotating plate 2 is limited so that the rotating plate 2 can only rotate inside the fixed tube 3 and cannot slide.

[0032] The inner wall of the fixed tube 3 is slidably mounted with a sliding tube 6, the inner wall of the fixed tube 3 is fixedly mounted with a clamping strip, the surface of the sliding tube 6 is provided with a sliding clamping groove adapted to the clamping strip, and one end of the sliding tube 6 is fixedly mounted with an end plate 7. The sliding tube 6 is limited so that the sliding tube 6 can only slide on the fixed tube 3 but cannot rotate.

[0033] Secondly, a connecting shaft 10 is fixedly installed on one side of the rotating plate 2 away from the fishing rod 1, and a threaded head 11 is fixedly installed on one end of the connecting shaft 10 extending into the interior of the sliding tube 6, and the threaded head 11 is threadedly connected with the sliding tube 6. Rotating the fishing rod 1 drives the rotating plate 2 to rotate, drives the connecting shaft 10 to rotate, and then drives the threaded head 11 to rotate, so that the sliding tube 6 slides inside the fixed tube 3.

[0034] Meanwhile, the inner support assembly 5 includes a slider 51 slidably mounted inside the slide groove 41 , a sliding base 52 fixedly mounted on one side of the slider 51 , and an outer support plate 53 fixedly mounted on one side of the sliding base 52 .

[0035] A limiting block 511 is fixedly installed on a side of the sliding block 51 away from the sliding base 52 , and the limiting block 511 is located on a side of the top plate 4 where the fixing pipe 3 is installed.

[0036] Secondly, an anti-skid rubber 531 is fixedly installed on the outer side of the outer support plate 53, and the curvature of the outer support plate 53 is equal to the inner curvature of the drill rod.

[0037] Finally, the inner side of the outer support plate 53 is fixedly mounted with an ear seat 8, and the surface of the sliding tube 6 is fixedly mounted with an ear seat 8. The two ear seats 8 are connected by a connecting rod 9, and the two ends of the connecting rod 9 are respectively rotatably connected with the ear seats 8. The sliding tube 6 moves to the right, driving the bottom end of the connecting rod 9 to move to the right, causing the outer support plate 53 to shrink inward, and the sliding tube 6 moves to the left, driving the bottom end of the connecting rod 9 to move to the left, causing the outer support plate 53 to expand outward, and the outer side of the outer support plate 53 contacts the inner wall of the drill rod, and the drill rod is stuck.

[0038] The working principle of the above embodiment is: the inner support assembly 5 is contracted by controlling the salvage rod 1, and then the inner support assembly 5 is inserted into the inside of the well until the top plate 4 contacts the broken part of the drill pipe, at which time the inner support assembly 5 enters the inside of the drill pipe, and then the staff rotates the salvage rod 1 to control the inner support assembly 5 to expand outward to jam the drill pipe, and then the staff will lift the salvage rod 1 to lift the drill pipe out of the well.

Claims

1. A drill pipe fishing tool, characterized in that: It comprises a salvage rod (1), a rotating plate (2) fixedly mounted at one end of the salvage rod (1), a fixed pipe (3) rotatably mounted on the surface of the rotating plate (2), a top plate (4) fixedly mounted at one end of the fixed pipe (3), and an inner support assembly (5) arranged on the top plate (4) and used for supporting the inside of the drill pipe to clamp the drill pipe, wherein one side of the top plate (4) is provided with four slide grooves (41); The inner support assembly (5) comprises a sliding block (51) slidably mounted inside the sliding groove (41), a sliding base (52) fixedly mounted on one side of the sliding block (51), and an outer support plate (53) fixedly mounted on one side of the sliding base (52).

2. A drill pipe fishing tool according to claim 1, characterized in that: A limiting block (511) is fixedly mounted on a side of the sliding block (51) away from the sliding base (52), and the limiting block (511) is located on a side of the top plate (4) on which the fixing tube (3) is mounted.

3. A drill pipe fishing tool according to claim 1, characterized in that: The outer side of the outer support plate (53) is fixedly mounted with anti-slip rubber (531), and the curvature of the outer support plate (53) is equal to the inner curvature of the drill rod.

4. A drill pipe fishing tool according to claim 1, characterized in that: An annular clamping block is fixedly mounted on the surface of the rotating plate (2), and an annular clamping groove matching the annular clamping block is formed on the inner side wall of the fixed tube (3).

5. A drill pipe fishing tool according to claim 1, characterized in that: A sliding tube (6) is slidably mounted on the inner side wall of the fixed tube (3), a clamping strip is fixedly mounted on the inner side wall of the fixed tube (3), a sliding clamping groove matching the clamping strip is formed on the surface of the sliding tube (6), and an end plate (7) is fixedly mounted on one end of the sliding tube (6).

6. A drill pipe fishing tool according to claim 5, characterized in that: An ear seat (8) is fixedly mounted on the inner side of the outer support plate (53), and an ear seat (8) is fixedly mounted on the surface of the sliding tube (6). The two ear seats (8) are connected via a connecting rod (9), and both ends of the connecting rod (9) are rotatably connected to the ear seats (8).

7. A drill pipe fishing tool according to claim 5, characterized in that: A connecting shaft (10) is fixedly mounted on one side of the rotating plate (2) away from the salvage rod (1), and a threaded head (11) is fixedly mounted on one end of the connecting shaft (10) extending into the interior of the sliding tube (6), and the threaded head (11) is threadedly connected to the sliding tube (6).

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