Rotary drilling bit fishing tool

Abstract

The present invention discloses a technology in the field of fishing tools, specifically a rotary drilling bit fishing tool, which includes a guiding cylinder. At the upper end of the guiding cylinder, a power input connecting square head is fixedly arranged. At the upper end inside the guiding cylinder, a cylindrical pin is fixedly arranged. At the left end of the cylindrical pin, a compression spring is fixedly arranged. At the left end of the compression spring, a towing rope is fixedly arranged. At the right end of the cylindrical pin, a pin limiting plate is fixedly arranged. At both ends above the inside of the guiding cylinder, symmetrically arranged enlarged guiding cylinder mounting shafts are fixedly arranged. At the lower end of the inner wall of the guiding cylinder, a detachable spiral plate is fixedly arranged. At the left end of the detachable spiral plate, a detachable hook head is longitudinally arranged. It effectively replaces the previous manual fishing of the main part of the round drill bit and the sand control plate on the round drill bit, not only ensuring the personal safety of the operators, but also the various fishing execution elements of the fishing tool are detachable, flexible and variable. Through various combinations verified, it can fish for various parts of the round drill bit that fall into the deep well.

Description

Technical Field

[0001] The present invention relates to the technical field of fishing tools, specifically a rotary drilling bit fishing tool. Background Art

[0002] The rotary drilling bit fishing tool is a multi-functional composite bit fishing tool. When the main body part of the round bit used on a rotary drilling rig (including two cases: the main body with the connecting square head damaged and the main body with the connecting square head undamaged) or the sand control plate on the round bit accidentally falls into a deep well, this fishing tool can be installed on the rotary drilling rig to fish it, directly changing the previous situation where personnel need to go down into the deep well for fishing operations, effectively changing the working environment and ensuring the personal safety of the operating personnel. In addition, each fishing execution element of the fishing tool is detachable, flexible and variable. After various combinations are verified, it can fish for all situations where each part of the round bit falls into the deep well. Summary of the Invention

[0003] The purpose of the present invention is to provide a rotary drilling bit fishing tool to solve the problems proposed in the above background art, that is, currently, the fishing of the main body part of the round bit and the round bit is carried out manually. This method not only cannot ensure the personal safety of the operating personnel, but also is troublesome to fish and is affected by the working environment.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A rotary drilling bit fishing tool, including a guide cylinder. A power input connecting square head is fixedly arranged at the upper end of the guide cylinder. A cylindrical pin is fixedly arranged at the upper end inside the guide cylinder. A compression spring is fixedly arranged at the left end of the cylindrical pin. A towing rope is fixedly arranged at the left end of the compression spring. A pin limiting plate is fixedly arranged at the right end of the cylindrical pin. Symmetrically arranged enlarged guide cylinder mounting shafts are fixedly arranged at both ends above the inside of the guide cylinder. A detachable spiral plate is fixedly arranged at the lower end of the inner wall of the guide cylinder. A detachable hook is longitudinally arranged at the left end of the detachable spiral plate.

[0005] Preferably, the inner cavity of the power input connecting square head is square, and reinforcing steel plates are fixedly arranged on the side wall of the power input connecting square head in a uniformly arranged manner.

[0006] Preferably, the two detachable hooks are symmetrically arranged inside the guide cylinder, and the lower ends of the two detachable hooks both extend to the lower end of the guide cylinder.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] Through the combined cooperation of a guiding cylinder, a power input connecting square head, a cylindrical pin, a compression spring, an enlarged guiding cylinder mounting shaft, and a detachable hook head, it effectively replaces the previous manual fishing of the main part of the round drill bit and the sand control plate on the round drill bit. This not only ensures the personal safety of the operators, but also the various fishing execution elements of the fishing tool are detachable, flexible and variable. After verification of various combinations, it can fish for various parts of the round drill bit that have fallen into the deep well. Brief Description of the Drawings

[0009] Figure 1 It is a front structural schematic diagram of the present invention;

[0010] Figure 2 It is a front structural schematic diagram of Operation Condition 1;

[0011] Figure 3 It is a front structural schematic diagram of Operation Condition 2;

[0012] Figure 4 It is a bottom view structural schematic diagram of Operation Condition 2;

[0013] Figure 5 It is a front structural schematic diagram of Operation Condition 3;

[0014] Figure 6 It is a bottom view structural schematic diagram of Operation Condition 3.

[0015] In the figure: 1 guiding cylinder, 2 power input connecting square head, 3 cylindrical pin, 4 compression spring, 5 towing rope, 6 pin limiting plate, 7 enlarged guiding cylinder mounting shaft, 8 detachable spiral plate, 9 detachable hook head. Detailed Description of the Preferred Embodiment

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0018] Embodiment:

[0019] Please refer to Figure 1-6The present invention provides a technical solution: a rotary drilling drill bit salvage device, comprising a guide cylinder 1, a power input connecting square head 2 is fixedly provided on the upper end of the guide cylinder 1, a cylindrical pin 3 is fixedly provided on the upper end of the guide cylinder 1, a compression spring 4 is fixedly provided on the left end of the cylindrical pin 3, a traction rope 5 is fixedly provided on the left end of the compression spring 4, a pin limiting plate 6 is fixedly provided on the right end of the cylindrical pin 3, symmetrical enlarged guide cylinder mounting shafts 7 are fixedly provided on both ends of the upper part of the guide cylinder 1, a detachable spiral plate 8 is fixedly provided on the lower end of the inner wall of the guide cylinder 1, and a detachable hook 9 is longitudinally provided on the left end of the detachable spiral plate 8.

[0020] The inner cavity of the power input connection square head 2 is arranged in a square shape, and the side walls of the power input connection square head 2 are fixedly provided with uniformly arranged reinforcing steel plates.

[0021] The two detachable hook heads 9 are symmetrically arranged inside the guide cylinder 1, and the lower ends of the two detachable hook heads 9 extend to the lower end of the guide cylinder 1 (such as Figure 1 shown).

[0022] Working principle: (1) Operation situation 1: When a round drill bit with an intact square head falls into a deep well, the salvage method is as follows: When a round drill bit with an intact square head falls into a deep well, we adjust and install the rotary drilling bit salvage device to the form shown in the figure above, and put the salvage device into the deep well through the action of the rotary drilling rig. Because the inner diameter of the guide tube of the salvage device is slightly larger than that of the round drill bit, the round drill bit can be gradually guided and aligned through the guide tube 1. After the round drill bit is guided and aligned, the salvage device is rotated left and right and gradually lowered. When the square head of the inner wall of the salvage device enters the installation square cavity of the round drill bit, the salvage device continues to The downward movement will make the cylindrical pin 3 enter the installation square cavity of the round drill bit. At the same time, since the pin limit plate 6 is only spot-welded on the square head wall, it plays a role in preventing the spring from ejecting the cylindrical pin 3. Therefore, the pin limit plate 6 is easily washed off on the square cavity wall of the round drill bit. In this way, the cylindrical pin moves outward under the action of the spring elastic force. We then rotate the salvage device and gradually find the pin hole on the square cavity of the round drill bit, so that the cylindrical pin 3 is inserted into the pin hole of the square pile of the round drill bit. At the same time, since we have fixed a traction rope at the tail end of the cylindrical pin 3, this prevents the cylindrical pin 3 from leaving the predetermined position, thereby realizing salvage;

[0023] (2) Operating Condition 2: Fishing method when a round drill bit with a damaged connecting square head falls into a deep well: When a round drill bit with a damaged connecting square head falls into a deep well, we adjust and install the rotary drill bit fishing tool into the form shown above, that is, remove the previous fishing tool part containing the spring and the cylindrical pin 3, and then install the spiral detachable fishing tool shown above on the guide cylinder 1. After installing the four spiral detachable fishing tools in this way, the diameter of the bottom tip is slightly larger than the outer diameter of the round drill bit, and the diameter of the top is smaller than the inner diameter of the outer wall of the round drill bit. Through downward rotation, under the action of the spiral surface of the fishing tool, the round drill bit can be rotated above the top surface of the spiral detachable fishing tool, and thus the round drill bit with a damaged connecting square head can be taken out;

[0024] (3) Operating Condition 3: Fishing method when the sand control plate on the round drill bit falls into a deep well: When the sand control plate on the round drill bit falls into a deep well, we adjust and install the rotary drill bit fishing tool, that is, remove the previously introduced fishing tool and install the detachable hook head. The sand control plate has two sand inlet fan-shaped openings. The detachable hook head of our fishing tool enters the sand control plate from the fan-shaped opening, and then rotate the fishing tool to hook up the sand control plate;

[0025] In addition, due to the wide variety of round drill bits with different diameters, our fishing tool is designed with an enlarged guide cylinder mounting shaft for this situation. The guide cylinder can be conveniently replaced through this mounting shaft, and the deep well fishing of round drill bits of different sizes can be carried out by the same method.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention; therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Rotary drilling bit fishing tool, including a guiding cylinder (1), characterized in that, a power input connecting square head (2) is fixedly arranged at the upper end of the guiding cylinder (1), a cylindrical pin (3) is fixedly arranged at the upper end inside the guiding cylinder (1), a compression spring (4) is fixedly arranged at the left end of the cylindrical pin (3), a towing rope (5) is fixedly arranged at the left end of the compression spring (4), a pin limiting plate (6) is fixedly arranged at the right end of the cylindrical pin (3), symmetric enlarged guiding cylinder mounting shafts (7) are fixedly arranged at both ends above the inside of the guiding cylinder (1), a detachable spiral plate (8) is fixedly arranged at the lower end of the inner wall of the guiding cylinder (1), a detachable hook head (9) is longitudinally arranged at the left end of the detachable spiral plate (8), the inner cavity of the power input connecting square head (2) is square, reinforcing steel plates are fixedly arranged on the side wall of the power input connecting square head (2) in a uniformly arranged manner, the two detachable hook heads (9) are symmetrically arranged inside the guiding cylinder (1), and the lower ends of the two detachable hook heads (9) both extend to the lower end of the guiding cylinder (1).

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