An embedded slip liner hanger

A tile liner and hanger technology, applied in wellbore/well parts, earthwork drilling and production, etc., can solve the problems of large tool outer diameter, large design space, unsuitable tools, etc., to simplify the structure and reduce the circulation pressure loss , the effect of reducing the outer diameter

Active Publication Date: 2021-03-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing hydraulic liner hanger requires a large design space, resulting in a large outer diameter of the tool, which makes the tool unsuitable for some small clearance wells where the design space is insufficient

Method used

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  • An embedded slip liner hanger
  • An embedded slip liner hanger
  • An embedded slip liner hanger

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0028] figure 1 A partial structure of the liner hanger 10 with embedded slips in the embodiment of the present invention is schematically shown. figure 2 Another partial structure of the slip liner hanger 10 embedded in the embodiment of the present invention is schematically shown. image 3 A third partial structure of the liner hanger 10 with embedded slips in the embodiment of the present invention is schematically shown. Figure 4a , Figure 4b The structures of the slips 2 of the embodiments of the present invention are schematically shown respectively. Figure 5a Schematically shows the partial structure of the body 1 of the embodiment of the present invention, Figure 5b Schematically shows the installation state of the slips 2 and the body 1 of the...

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Abstract

The invention provides an embedded slip liner hanger, comprising a body, a slip, a core shaft, a first connecting part, a setting driving mechanism, a lower connector and a central pipe. The body is provided with an installation groove used for containing the slip, the depth of the installation groove is not smaller than the thickness of the slip, the core shaft is arranged in the body, the setting driving mechanism is arranged on the core shaft in a sleeving mode, the setting driving mechanism is fixed to the core shaft through the first connecting part, and the setting driving mechanism is connected with the slip. The setting driving mechanism can overcome the resistance of the first connecting part to move upwards so as to drive the slip to move upwards, so that the slip can be opened in the circumferential direction to be connected with an upper-layer sleeve. The lower connector is located at the bottom end of the core shaft, the central pipe is connected with the lower connector,and sealing cores used for pressure build-up sealing are arranged on the periphery of the central pipe. The hanger can be suitable for a small-gap well structure, the problem that a small-gap well isinsufficient in design space can be solved, and enough annular space overflowing area and inner drift diameter can be provided.

Description

technical field [0001] The invention relates to the technical field of petroleum cementing downhole tools, in particular to a liner hanger with embedded slips. Background technique [0002] The liner hanger is a commonly used downhole tool in oil exploration and development at present. It can be divided into three types: mechanical, hydraulic, and hydraulic-mechanical double-action according to the different mounting and hanging methods. Among them, the hydraulic liner hanger is the most widely used. . The hydraulic liner hanger activates the hydraulic cylinder of the liner hanger by suppressing the pressure inside the pipe, and the hydraulic cylinder pushes the slip mechanism to realize the sitting and hanging. At present, in order to solve the technical problems of liner cementing under complex well conditions such as deep wells and small clearance wells, a variety of different types of liner hangers with embedded slips have been developed successively. However, the exis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/04
CPCE21B23/04
Inventor 张瑞阮臣良马兰荣杨德锴李夯
Owner CHINA PETROLEUM & CHEM CORP
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