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Lever-pulley-triggered static pressure fishing device

A salvage device and trigger-type technology, which is applied in the direction of wellbore/well components, earthwork drilling and mining, etc., can solve problems such as difficulty in fishing for falling objects in the well, restrictions on fishing objects, etc.

Active Publication Date: 2017-05-31
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 lever pulley trigger static pressure fishing device to solve the problems 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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  • Lever-pulley-triggered static pressure fishing device
  • Lever-pulley-triggered static pressure fishing device

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Embodiment Construction

[0020] See figure 1 with figure 2 Shown:

[0021] The lever-pulley-triggered hydrostatic fishing device provided by the present invention includes an outer tube 1, an upper piston 2, a lower piston 3, and a contact rod 4. The upper piston 2 is arranged in the upper part of the inner cavity of the outer tube 1, and the lower piston 3 is arranged in the outer tube 1. In the lower part of the cavity, on the side wall of the 3 circumference of the lower piston, several V-shaped arms 7 are hinged through several pivot shafts 5. The V-shaped arms 7 can rotate around the pivot shaft 5, and the top of the V-shaped arms 7 is pivoted. There is an upper pulley 8, which is clamped in a slot formed on the inner wall of the outer tube 1. A lower pulley 9 is pivotally connected to the lower end of the V-shaped arm 7, and a guide rod 10 is fixed in the middle of the lower piston 3. The lower end of the guide rod 10 Equipped with a vertebral head 11, the vertebral head 11 can slide up and down ...

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Abstract

The invention discloses a lever-pulley-triggered static pressure fishing device. The device comprises an outer pipe, an upper piston, a lower piston and touch rods; the upper piston is arranged on the upper portion of an inner cavity of the outer pipe, the lower piston is arranged on the lower portion of the inner cavity of the outer pipe, and a plurality of V-shaped arms are hinged to the circumferential side wall of the lower piston through a plurality of pivot shafts and can rotate around the pivot shafts; upper pulleys are connected to the top ends of the V-shaped arms in a pivot mode and connected into clamping grooves formed in the inner wall of the outer pipes in a clamped mode, and lower pulleys are connected to the lower ends of the V-shaped arms in a pivot mode; a guide rod is fixed to the middle of the lower piston, a conical head is assembled at the lower end of the guide rod and can slide on the guide rod up and down, and the upper end of the conical head can touch the lower pulleys to enable the lower pulleys to drive the V-shaped arms to rotate around the pivot shafts. The device has the advantage that the problems that in related drilling operation, downhole junk is difficult to fish, and fishing objects are limited are thoroughly solved.

Description

Technical field [0001] The invention relates to a static pressure fishing device, in particular to a lever pulley trigger type static pressure fishing device. Background technique [0002] Currently, in polar drilling, low temperature will seriously affect the brittleness and ductility of commonly used engineering materials. Most steels (except stainless austenite) will become brittle at minus 10 degrees Celsius. The transition temperature that occurs in brittle fracture of steel is reduced due to the decrease of carbon content and the increase of nickel content. Even low-temperature steel, tool steel or stainless steel are used in downhole drilling equipment. Some small parts of drilling tools (cutting teeth, screws, nuts, rolling bearings, etc.) are finally broken due to fatigue and wear or the production quality is not up to standard and fall into the hole. bottom. In addition, small tools (such as screwdrivers, wrenches, and other small parts, etc.) may also fall to the bot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/12
CPCE21B31/12
Inventor 达拉拉伊帕维尔李星辰宫达范晓鹏刘永文李枭陈云望刘安
Owner JILIN UNIV
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