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Over chuck distance steel wire operation slip plug

A technology of working card and plug, which is applied in drilling equipment, wellbore/well components, earth-moving drilling and other directions, can solve the problem of not being able to achieve over-jamming and plugging, and achieve the effect of good use effect.

Inactive Publication Date: 2013-01-30
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The minimum inner diameter of the eccentric water distributor commonly used in oilfield water injection wells is 46mm, but the existing plugging tools cannot achieve over-card distance plugging because the outer diameter is larger than the scaled inner hole of the original well string

Method used

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  • Over chuck distance steel wire operation slip plug

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Effect test

Embodiment Construction

[0009] The present invention will be further described below in conjunction with accompanying drawing:

[0010] Depend on figure 1 As shown, the over-grip steel wire operation slip plug includes a fishing cap 1 and a fixed support seat 19, the fishing cap 1 is threadedly connected to the center rod 3, and the fishing cap 3 is limited to the center rod by the limit screw 2 3, the outer wall of the central rod 3 is sequentially set with a positioning support seat 6, a lock ring outer cylinder 9, a slip upper seat 10, a slip 12 and a slip lower seat 13, wherein the positioning support seat 6, the lock ring outer cylinder 9, and the slip upper seat 10 are all threaded connections; the bottom of the slip lower seat 13 is two rubber tube sheaths 14 and a support seat 19 threaded with the end of the center rod 3; the two rubber tube sheaths 14 are interposed Rubber tube 16 and inner rubber tube 17. Moreover, the outer diameter of the plug is smaller than the scaled inner hole of th...

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Abstract

The invention relates to an over chuck distance steel wire operation slip plug special for snubbing operation of a water injection well during oil extraction. The plug comprises a fishing cap and a fixed supporting seat, wherein the fishing cap is connected with a center rod; the outer wall of the center rod is sequentially sleeved on a positioning supporting seat, a locking ring outer cylinder, a slip upper seat, a slip and a slip lower seat; the lower side of the slip lower seat is provided with two rubber cylinder sheaths and a supporting seat; an outer rubber cylinder and an inner rubber cylinder are arranged between the two rubber cylinder sheaths. According to the plug, the outer diameter of the plug is smaller than the inner diameter of an eccentric water distributor for the water injection well, so that a tail pipe can be plugged at a chuck distance section under the conditions that the original well pipe column scales severely, and the drift diameter is reduced; and the interior of a part below a tubing coupling at assigned depth can be plugged by mechanically shocking the plug through a steel wire operation tool ring under the well.

Description

technical field [0001] The invention relates to an over-snap liner plugging tool specially used for the pressure operation of water injection wells in oil production, in particular to a slip plug for over-slip steel wire operation. Background technique [0002] In the pressure operation of water injection wells in oil fields, it is necessary to block the inside of the tubing in the original well tubing section and below the section. The minimum inner diameter of eccentric water distributors commonly used in oilfield water injection wells is 46mm, and the existing plugging tools cannot achieve over-card distance plugging because the outer diameter is larger than the scaled inner hole of the original well string. Contents of the invention [0003] In order to solve the above problems, the present invention provides a slip plug for over-slip wire operation. The outer diameter of the plug is smaller than the inner diameter of the eccentric water distributor used in the wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B19/10E21B33/12
Inventor 陈建业赵鑫王岩李俊厚付贺王秀臣
Owner PETROCHINA CO LTD
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