Composite fishing equipment for coal mine underground drilling accident handling

Abstract

The utility model relates to the technical field of coal mine mechanical equipment, in particular to composite fishing equipment for handling underground coal mine drilling accidents. The composite fishing equipment for handling the coal mine underground drilling accident comprises a composite fishing cone, square grooves are evenly formed in the outer side wall of a female cone of the composite fishing cone, first threaded holes are formed in the square grooves, cutting blocks are evenly arranged on the outer side wall of the female cone of the composite fishing cone, and the first threaded holes are communicated with the cutting blocks. An inserting block is arranged on the side, close to the composite fishing cone female tap, of the cutting block, a counter bore is formed in the outer side wall of the cutting block in a penetrating mode, a second threaded hole is formed in the outer side wall of the inserting block in a penetrating mode, and the counter bore, the first threaded hole and the second threaded hole are aligned; when the cutting block is damaged and needs to be replaced, a slotted screwdriver is inserted into the slotted groove and rotates, so that the bolt can be screwed off, and then the cutting block and the inserting block can be quickly pulled out and replaced, so that the fishing efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine mechanical equipment, in particular to a composite fishing device for dealing with borehole accidents in coal mines underground. Background Technique

[0002] During the construction process of boreholes in coal mines underground, due to factors such as the quality of the drill pipe itself, the borehole trajectory, or the stability of the borehole wall, the drill pipe in the hole may break. In response to the drill pipe breakage accident, usually the construction party uses a fishing drill pipe to send a fishing male taper or a fishing female taper to fish the broken drill pipe. Due to factors such as lack of operation skills and unsatisfactory borehole trajectory, the fishing drill pipe may break, resulting in a secondary accident. After the secondary accident occurs, usually a fishing female taper with a corresponding grading is used to deal with the secondary accident.

[0003] Chinese Patent with publication number CN208686342U discloses a composite fishing taper for dealing with borehole accidents in coal mines underground, belonging to the technical field of coal mine machinery. The composite fishing taper is composed of a male taper and a female taper that are sleeved and positioned and connected to each other. The axial inner wall of the female taper extending outward from the connection of the self-positioning connection is processed with an expanded-mouth conical threading for making a connection. The axial outer wall of the male taper extending outward from the connection of the self-positioning connection and on the same side as the expanded-mouth conical threading for making a connection is processed with a reduced-mouth conical threading for making a connection. The utility model skillfully combines the existing fishing male and female tapers into an effective whole, having the advantages of delicate structure, simple operation, low manufacturing cost, etc., being able to increase the probability of the fishing taper wedging and firmly clamping the broken drill tool, and setting and installing cutting blades and diameter protection strips so that the fishing taper can handle the situations of resistance during drill feeding and drill lifting, thereby increasing the success rate of the fishing operation;

[0004] The above-mentioned existing technical solutions have the following defects: Since the cutting blade is fixed on the outer wall of the female taper, it is difficult to replace quickly when the cutting blade is damaged during operation, and further, the entire composite fishing taper cannot be quickly repaired when the cutting blade is damaged, thus affecting the fishing efficiency. In view of the above situation, technical innovation is carried out on the basis of the existing composite fishing equipment for dealing with borehole accidents in coal mines underground. Content of the Utility Model

[0005] The purpose of the utility model is to provide a composite fishing device for dealing with borehole accidents in coal mines underground to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A composite fishing device for dealing with borehole accidents in coal mines underground, comprising:

[0007] Composite fishing cone, the outer wall of the female cone of the composite fishing cone is evenly provided with square grooves, the square grooves are provided with first threaded holes, the outer wall of the female cone of the composite fishing cone is evenly provided with cutting blocks, one side of the cutting block close to the female cone of the composite fishing cone is provided with an insertion block, a counterbore is penetrated through the outer wall of the cutting block, a second threaded hole is penetrated through the outer wall of the insertion block, the counterbore, the first threaded hole and the second threaded hole are aligned, and a fixing component is placed in the counterbore, the first threaded hole and the second threaded hole.

[0008] Preferably, the fixing component includes a bolt, a second sealing ring and a magnetic ring. A slotted screwdriver groove is provided at the top of the bolt. Two groups of first clamping grooves are evenly provided on the outer wall of the bolt head. A first clamping ring is clamped in the first clamping groove. A first sealing ring is provided on the outer wall of the first clamping ring. Second clamping rings are evenly provided on the inner wall of the second sealing ring.

[0009] Preferably, two groups of second clamping grooves are evenly provided on the outer wall of the insertion block, and the second clamping ring is clamped in the second clamping groove.

[0010] Preferably, the insertion block is inserted into the square groove, the bolt is arranged in the counterbore and is screwed with the first threaded hole and the second threaded hole.

[0011] Preferably, the outer wall of the first sealing ring is closely attached to the inner wall of the counterbore, and the outer wall of the second clamping ring is closely attached to the inner wall of the square groove.

[0012] Preferably, the cutting block and the insertion block are integrally formed. The magnetic ring is embedded at the bottom of the square groove, and the top of the magnetic ring is magnetically attracted to the bottom of the insertion block.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the present utility model, the insertion block is adsorbed and fixed in the square groove by the magnetic ring, and then the cutting block and the insertion block are secondarily fixed by the bolt, so as to ensure the installation stability of the cutting block and further ensure the use reliability of the device;

[0015] When the cutting block is damaged and needs to be replaced, only need to clean the slotted screwdriver groove first, then insert a slotted screwdriver into the slotted screwdriver groove and rotate it to unscrew the bolt, and then the cutting block and the insertion block can be quickly pulled out and replaced, so as to ensure the efficiency of the fishing work;

[0016] The connection gap between the bolt and the counterbore is sealed by the first sealing ring, and the connection gaps between the insertion block and the square groove and between the cutting block and the female cone of the composite fishing cone are sealed by the second sealing ring, so as to prevent pollutants such as pulverized coal and muddy water from contacting the screw rod of the bolt during the fishing work, and further ensure the smoothness of the bolt disassembly. Description of the Drawings

[0017] Figure 1 This is a schematic structural diagram of a composite fishing device for dealing with borehole accidents in coal mines according to the present utility model;

[0018] Figure 2 This is a front sectional view of a composite fishing device for dealing with borehole accidents in coal mines according to the present utility model;

[0019] Figure 3 According to the present utility model Figure 2 An enlarged view of part A.

[0020] In the figure: 1. Composite fishing cone; 2. Cutting block; 21. Insert block; 3. Bolt; 31. Slotted head; 32. First sealing ring; 33. First snap ring; 34. Second sealing ring; 35. Second snap ring; 36. Magnetic ring. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 - 3, a composite fishing device for dealing with borehole accidents in coal mines, including a composite fishing cone 1. Square grooves are evenly opened on the outer wall of the female cone of the composite fishing cone 1, and first threaded holes are opened in the square grooves. Cutting blocks 2 are evenly placed on the outer wall of the female cone of the composite fishing cone 1. On the side of the cutting block 2 close to the female cone of the composite fishing cone 1, a plug 21 is fixedly arranged. A counterbore is penetrated through the outer wall of the cutting block 2, and a second threaded hole is penetrated through the outer wall of the plug 21. The counterbore, the first threaded hole and the second threaded hole are aligned. A fixing component is placed in the counterbore, the first threaded hole and the second threaded hole. The fixing component includes a bolt 3, a second sealing ring 34 and a magnetic ring 36. A slotted hole 31 is opened at the top of the bolt 3. Two groups of first clamping grooves are evenly opened on the outer wall of the bolt head of the bolt 3. A first clamping ring 33 is clamped in the first clamping groove. A first sealing ring 32 is fixedly arranged on the outer wall of the first clamping ring 33. Second clamping rings 35 are evenly fixedly arranged on the inner wall of the second sealing ring 34. The first sealing ring 32 is fixed on the outer wall of the bolt head of the bolt 3 through the first clamping ring 33. The second sealing ring 34 is fixed on the outer wall of the plug 21 through the second clamping ring 35. The connection gap between the bolt 3 and the counterbore is sealed through the first sealing ring 32. The connection gap between the plug 21 and the square groove and the connection gap between the cutting block 2 and the female cone of the composite fishing cone 1 are sealed through the second sealing ring 34. In this way, when carrying out the fishing work, pollutants such as coal powder and muddy water are prevented from contacting the screw rod of the bolt 3, thereby ensuring the smoothness of the disassembly of the bolt 3. Two groups of second clamping grooves are evenly opened on the outer wall of the plug 21. The second clamping ring 35 is clamped in the second clamping groove. The plug 21 is inserted into the square groove. The bolt 3 is rotatably arranged in the counterbore and is screwed with the first threaded hole and the second threaded hole. The outer wall of the first sealing ring 32 is closely attached to the inner wall of the counterbore. The outer wall of the second clamping ring 35 is closely attached to the inner wall of the square groove. The cutting block 2 and the plug 21 are integrally formed. The magnetic ring 36 is embedded at the bottom of the square groove. The top of the magnetic ring 36 is magnetically attracted to the bottom of the plug 21. The plug 21 is adsorbed and fixed in the square groove through the magnetic ring 36, and then the cutting block 2 and the plug 21 are secondarily fixed through the bolt 3, so as to ensure the installation stability of the cutting block 2, and further ensure the use reliability of the device. When the cutting block 2 is damaged and needs to be replaced, only need to clean the slotted hole 31 first, and then insert a flat screwdriver into the slotted hole 31 and rotate it to unscrew the bolt 3, and then the cutting block 2 and the plug 21 can be quickly pulled out and replaced.

[0023] Working principle: The insert block 21 is adsorbed and fixed in the square groove through the magnetic ring 36, and then the cutting block 2 and the insert block 21 are secondarily fixed through the bolt 3, so as to ensure the installation stability of the cutting block 2, and further ensure the use reliability of the device. When the cutting block 2 is damaged and needs to be replaced, only need to clean the slotted hole 31 first, and then insert a flat screwdriver into the slotted hole 31 and rotate it to screw down the bolt 3, and then the cutting block 2 and the insert block 21 can be quickly pulled out and replaced. The first sealing ring 32 is fixed on the outer side wall of the screw head of the bolt 3 through the first snap ring 33, and the second sealing ring 34 is fixed on the outer side wall of the insert block 21 through the second snap ring 35. The connection gap between the bolt 3 and the counterbore is sealed through the first sealing ring 32, and the connection gaps between the insert block 21 and the square groove and between the cutting block 2 and the female cone of the composite fishing cone 1 are sealed through the second sealing ring 34, so as to prevent pollutants such as pulverized coal and muddy water from contacting the screw rod of the bolt 3 during the fishing operation, and further ensure the disassembly smoothness of the bolt 3.

Claims

1. A composite salvage device for handling drilling accidents in coal mines, characterized in that: include: A composite salvage cone (1), wherein the outer wall of the mother cone of the composite salvage cone (1) is uniformly provided with square grooves, a first threaded hole is provided in the square groove, cutting blocks (2) are uniformly arranged on the outer wall of the mother cone of the composite salvage cone (1), an insert block (21) is arranged on the side of the cutting block (2) close to the mother cone of the composite salvage cone (1), a countersunk hole is penetrated through the outer wall of the cutting block (2), a second threaded hole is penetrated through the outer wall of the insert block (21), the countersunk hole, the first threaded hole and the second threaded hole are aligned, and a fixing component is arranged in the countersunk hole, the first threaded hole and the second threaded hole.

2. The composite salvage equipment for handling drilling accidents in underground coal mines according to claim 1, characterized in that: The fixing assembly comprises a bolt (3), a second sealing ring (34) and a magnetic ring (36); a straight groove (31) is provided on the top of the bolt (3); two groups of first clamping grooves are evenly provided on the outer side wall of the screw head of the bolt (3); a first clamping ring (33) is clamped in the first clamping groove; a first sealing ring (32) is provided on the outer side wall of the first clamping ring (33); and a second clamping ring (35) is evenly provided on the inner side wall of the second sealing ring (34).

3. The composite salvage equipment for handling drilling accidents in underground coal mines according to claim 2, characterized in that: Two groups of second clamping grooves are evenly formed on the outer side wall of the insert block (21), and the second clamping ring (35) is clamped in the second clamping grooves.

4. The composite salvage equipment for handling drilling accidents in underground coal mines according to claim 3 is characterized in that: The insert block (21) is inserted into the square groove, and the bolt (3) is arranged in the countersunk hole and is threadedly connected with the first threaded hole and the second threaded hole.

5. The composite salvage equipment for handling drilling accidents in underground coal mines according to claim 3 is characterized by: The outer wall of the first sealing ring (32) is tightly fitted with the inner wall of the counterbore, and the outer wall of the second clamping ring (35) is tightly fitted with the inner wall of the square groove.

6. The composite salvage equipment for handling drilling accidents in underground coal mines according to claim 3, characterized in that: The cutting block (2) and the insert block (21) are of an integrally formed design, the magnetic ring (36) is embedded in the bottom of the square groove, and the top of the magnetic ring (36) and the bottom of the insert block (21) are magnetically attracted to each other.

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