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Fishing device

A technology of overshot and fishing device, which is applied in the direction of wellbore/well parts, earthwork drilling and mining, etc., and can solve problems such as plugging failure of fishing

Active Publication Date: 2020-07-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a salvage device, which can solve the problem of salvage failure of the plug installed in the eccentric hole of the eccentric water distributor

Method used

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Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0046] figure 1 A schematic structural view of an overshot according to an embodiment of the present invention is illustrated. as attached figure 1As shown, the overshot includes: a rope cap 1, a main body 2, a first locking wheel device 3, a guide claw 4 and a first spring 5; the rope cap 1 is connected to the upper end of the main body 2, and the side of the main body 2 is provided with a first long groove and the second long groove, the first locking wheel device 3 and the guide pawl 4 are respectively connected with the pin shaft of the main body 2, the first locking wheel device 3 can lock the guide pawl 4 in the first long groove, and the two parts of the first spring 5 The ends are respectively fixedly connected with the side ...

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PUM

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Abstract

The invention discloses a fishing device, and belongs to the technical field of oil-gas well workover. The fishing device comprises a rope socket, a main body, a first lock wheel device, a guiding claw, a first spring, a sliding rod, a connecting sleeve, a second lock wheel device, a fishing device body and a second spring. According to the fishing device, the guiding claw and a pushing mechanismare locked in a first long groove and a second long groove respectively through the first lock wheel device and the second lock wheel device respectively; then the fishing device is lowered into an oil-gas well and lowered below an eccentric water distributor; the fishing device is lifted upwards, so that after the first lock wheel device and the second lock wheel device rotate reversely, the guiding claw pops up from the first long groove, and the pushing mechanism pops up from the second long groove; then the fishing device is lowered, so that a fishing head sleeves a blanking plug under theguiding action of the guiding claw; and then the sliding rod is lifted upwards and rapidly released to apply acting force to the main body, and the pushing mechanism applies acting force to a rotating mechanism, so that the fishing head is driven to rotate and grasp the blanking plug, and then the fishing device is lifted upwards to achieve blanking plug fishing.

Description

technical field [0001] The invention relates to the technical field of oil and gas well workover, in particular to an overshot. Background technique [0002] In the production process of oil and gas wells, due to the different water absorption capacity of different oil and gas layers, the water injection volume of different oil and gas layers is also different. Therefore, plugs can be installed in each oil and gas layer to adjust the amount of water injected into each oil layer through the plug. Wherein, the plug is installed in the eccentric hole of the eccentric water distributor. However, as the total amount of water injection in each oil layer increases, the water absorption capacity of each oil layer may change. At this time, the water injection volume adjusted by the plug may not meet the water injection volume required by each oil layer. Salvage and replace with a suitable plug. [0003] In the related art, the fishing head part of the overshot is provided with claw...

Claims

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Application Information

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IPC IPC(8): E21B31/20
CPCE21B31/20
Inventor 杨海超宋祖厂胡石锋汪文昌盖旭波张津红赖学明卫海涛王旭东刘忠玮
Owner PETROCHINA CO LTD