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Liner hanger

A liner hanger and transmission sleeve technology, applied in wellbore/well components, earth-moving drilling, etc., can solve the problems of inconvenient cementing construction, difficult liner string loss, etc., to achieve convenient operation and reliable action , The effect of transmitting large torque

Active Publication Date: 2019-03-12
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of concave-convex mechanism is difficult to realize the release of the liner string, which is inconvenient for the cementing construction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The present invention will be further described below in conjunction with accompanying drawing.

[0027] figure 1 The structure of a first embodiment of a liner hanger 100 according to the present invention is shown. Such as figure 1 As shown, the liner hanger 100 includes a transmission sleeve 3 connected to the mandrel 1 through an anti-rotation pin 2 and a connection sleeve 5 sleeved outside the transmission sleeve 3 . The transmission sleeve 3 is used to receive the torque from the mandrel 1, and the connecting sleeve 5 is used to connect the tailpipe (not shown). A first connecting piece 101 connecting the transmission sleeve 3 and the connecting sleeve 5 is provided between them. In the initial state, the first connection 101 connects the transmission sleeve 3 and the connection sleeve 5 . When replacing the paddle, when the mandrel 1 is rotated in the first direction (for example, clockwise), the transmission sleeve 3 will rotate in the same direction accordi...

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Abstract

The invention relates to a drilling liner hanger comprising a transmission sleeve used for receiving torque, and a connecting sleeve sleeving the transmission sleeve and used for connecting with a drilling liner; a first connector capable of disengaging from the connecting sleeve is arranged between the transmission sleeve and the connecting sleeve; in an initial state, the first connector connects the transmission sleeve with the connecting sleeve; when the transmission sleeve rotates in a first direction, the first connector drives the connecting sleeve to rotate in the first direction as well, thus transmitting the torque; when the transmission sleeve rotates in a second direction opposite to the first direction, the first connector is disengaged from the connecting sleeve, thus releasing the connecting sleeve; the drilling liner hanger can transmit torque, and can conveniently release the drilling liner.

Description

technical field [0001] The invention relates to the field of oil production, in particular to a liner hanger. Background technique [0002] The liner hanger is a commonly used device in cementing, and the most commonly used one is the expandable liner hanger, which hangs in the casing through the expanded metal body installed therein to realize the function of hanging the liner. [0003] In the cementing process, the rotation of the liner string is an important function of the expandable liner hanger. This is because the rotation of the liner during the running and cementing process can make the cement evenly distributed, thereby improving the cementing quality and displacement efficiency. the goal of. The realization process of the liner string rotation is as follows: the hanger is injected with cement slurry before the hanger is expanded; during the grout injection and slurry replacement process, the drilling tool rotates and transmits the torque to the liner string throu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/01
Inventor 谷磊郭朝辉郑晓志马兰荣邵志香杜鹏德刘明徐明会
Owner CHINA PETROLEUM & CHEM CORP