Hydrostatic fishing device

A salvage device and static pressure technology, applied in wellbore/well components, earthwork drilling and other directions, can solve problems such as difficulty in salvaging well falling objects, restrictions on salvage objects, etc. good effect

Inactive Publication Date: 2018-08-10
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a static pressure fishing device to solve the problem of difficulty in fishing for falling objects in the well and the limitation of fishing objects in related drilling operations

Method used

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Embodiment Construction

[0021] see figure 1 and figure 2 Shown:

[0022] The static pressure fishing device provided by the present invention includes an outer pipe 1, an upper slip ring 2, a lower slip ring 3 and a feeler rod 4, wherein the upper slip ring 2 is arranged on the upper part of the inner cavity of the outer pipe 1, and the lower slip ring 3 is arranged in the inner cavity of the outer pipe 1 The lower part of the sliding ring 3 is provided with a guide rod 5, the guide rod 5 is provided with a central cam 6, the central cam 6 can slide up and down along the guide rod 5, one side of the central cam 6 is engaged with a movable shaft 7, and the movable shaft The rear end of 7 is pierced in the installation hole 8 provided by the sliding ring 3 and the side wall of the outer tube 1, and the lower end of the guide rod 5 is equipped with a connector 9, which can slide up and down on the guide rod 5, and the connector 9 The upper end of the upper end can touch the lower end of the central c...

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PUM

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Abstract

The invention discloses a static pressure fishing device which comprises an outer tube, an upper slip ring, a lower slip ring and a feeler lever. The upper slip ring is arranged on the upper portion of an inner cavity of the outer tube, the lower slip ring is arranged on the lower portion of an inner cavity of the outer tube, a guide rod is arranged in the lower slip ring, a center cam is arranged on the guide rod in a penetrating mode and can slide up and down along the guide rod, one side of the center cam is meshed with a movable shaft, the rear end of the movable shaft is arranged in mounting holes formed in the lower slip ring and the side wall of the outer tube in a penetrating mode, a connector is assembled at the lower end of the guide rod and can slide up and down on the guide rod, the upper end of the connector can touch the lower end of the center cam to make the center cam separated from the movable shaft, the upper end of the feeler lever is fixed to the lower end of the connector, and a check valve is assembled at the bottom of the outer tube. The static pressure fishing device has the advantage that the problems that in related drilling operation, down-hole junk is difficult to fish, and the fishing objects are limited are thoroughly solved.

Description

technical field [0001] The invention relates to a fishing device, in particular to a static pressure fishing device. Background technique [0002] At present, in polar drilling, low temperature will seriously affect the brittleness and ductility of commonly used engineering materials, and most steels (except stainless steel austenitic) will become brittle at minus 10 degrees Celsius. The transition temperature at which brittle fracture occurs in the steel is lowered by decreasing the carbon content and increasing the nickel content. Even if low-temperature steel, tool steel or stainless steel are used in downhole drilling equipment, some small parts of drilling tools (cutters, screws, nuts, rolling bearings, etc.) are eventually damaged due to fatigue wear or substandard manufacturing quality and fall into the hole. end. In addition, small tools (such as screwdrivers, wrenches, and other small parts, etc.) may also fall to the bottom of the hole. After the foreign object ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B31/18
CPCE21B31/18
Inventor 达拉拉伊·帕维尔李星辰宫达范晓鹏刘永文李枭张晗
Owner JILIN UNIV
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