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Multifunctional fishing device

An overshot, multi-functional technology, applied in wellbore/well components, earth-moving drilling, etc., can solve the problems of salvage failure, unstable function, single fish drop, etc., to increase the use range, simple structure, stable function. Effect

Pending Publication Date: 2018-05-11
青海煤炭地质勘查院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The patent with the application number CN201621391254.1 provides an overshot. There are several inner bullet claws inside the overshot barrel. The lower part of the inner bullet claws is fixed on the inner wall of the overshot barrel. The upper part of the claw is located in the same cross-sectional plane in the overshot barrel and is evenly distributed. The upper part of the claw of the inner bullet forms a circular bayonet on the cross-sectional plane. The natural cooperation with the claws can achieve the purpose of salvage. Although it can improve the fishing efficiency to a certain extent, the function is unstable when used. Once the claws fail to catch the key position of the salvaged object, it may cause salvage failure or even damage. The equipment to be salvaged, and the fish to be salvaged at the same time are relatively simple

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] When the salvaged object is a cable, at first keep the electromagnet 15 in the state of not being connected to the power supply, attach the top of the strip claw 18 to the first magnet 14 on the inner wall of the overshot barrel 7, slowly put the overshot barrel into the shaft, When it is close to the cable, inject high-pressure liquid into the hydraulic cylinder 2 through the liquid injection port 5 pipeline, and the high-pressure liquid pushes the piston rod 11 to move downward, and then acts on the fishing spear 19, and the fishing spear 19 is pushed downward to the designated fishing position , the anti-detachment hook 3 on the fishing spear 19 can block the cable, and finally the cable is lifted to the ground by the joint 4.

Embodiment 2

[0023] When the salvaged object is an equipment instrument or a small metal part, if the first embodiment has been implemented before the second embodiment, the pressure relief valve 6 needs to be opened on the ground, and the spring 9 will return to the original position automatically after the hydraulic pressure is lost. position, drive the sliding plate 12 and the fishing spear 19 to rise and return together, then put the fish catcher into the shaft, when the fish start to enter the fish catcher, turn on the control power supply of the control electromagnet 15, at this time, because the electromagnet 15 produces The magnetic pole of the first magnet 14 is the same as that of the first magnet 14 in the overshot 7 inwall, so repulsion is generated. When the bottom of the fish falls through the top of the strip claw 18, the strip claw 18 can smoothly fall on the stopper 16 on the right side. When the fish is an instrument and equipment, due to the support of the strip-shaped cl...

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Abstract

The invention discloses a multifunctional fishing device and belongs to the field of geological exploration. The multifunctional fishing device includes a fishing socket and a joint; the fishing socket is a tubular structure with an opening in the lower end; strip-shaped clamping claws are installed at the lower end of the fishing socket, and the upper portions of the strip-shaped clamping claws are fixedly connected with electromagnets; the strip-shaped clamping claws are hinged with the fishing socket, and a first magnet is arranged on the inner wall of the fishing socket and is located at the relative position of the electromagnets; the relative positions, corresponding to the lower ends of the strip-shaped clamping claws, of the fishing socket are provided with baffle blocks, the baffle blocks are fixedly connected with the fishing socket, and second magnets are inlaid in the baffle blocks; a sliding plate is arranged in the fishing socket, block pieces are mounted on the inner wall of the fishing socket and located correspondingly at the lower positions of two ends of the sliding plate, the block pieces are fixedly connected with the fishing socket, and springs are connected between the block pieces and the sliding plate; and the inner wall of the fishing socket is symmetrically provided with sliding rails matched with two ends of the sliding plate in the vertical direction, the lower part of the sliding plate is connected with a fishing spear with a lock hook, and the upper part of the fishing socket is provided with a hydraulic cylinder. The multifunctional fishing device has the advantages of simple structure, simple operation, stable function, and is capable of salvaging various kinds of falling fish.

Description

technical field [0001] The invention belongs to the field of geological exploration, and in particular relates to a multifunctional fishing device. Background technique [0002] In geological exploration, in order to solve the problem that drilling equipment or some parts often fall downhole during the drilling process, people have produced various fishing equipment. [0003] The patent with the application number CN201621391254.1 provides an overshot. There are several inner bullet claws inside the overshot barrel. The lower part of the inner bullet claws is fixed on the inner wall of the overshot barrel. The upper part of the claw is located in the same cross-sectional plane in the overshot barrel and is evenly distributed. The upper part of the claw of the inner bullet forms a circular bayonet on the cross-sectional plane. The natural cooperation with the claws can achieve the purpose of salvage. Although it can improve the fishing efficiency to a certain extent, the fun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/12E21B31/18
CPCE21B31/12E21B31/125E21B31/18
Inventor 潘语录陈增福
Owner 青海煤炭地质勘查院