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Metal expansion type tail tube top packer

A packer, expansion technology, applied in sealing/packing, wellbore/well components, earth-moving drilling, etc. The effect of improving sealing quality, reliable performance, strong sealing ability and adaptability

Inactive Publication Date: 2014-08-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this kind of packer hanger is equipped with mechanisms such as rubber tube isolation and outburst prevention, which make the packer have many parts and complex structures, making the reliability not high during field use

Method used

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  • Metal expansion type tail tube top packer
  • Metal expansion type tail tube top packer
  • Metal expansion type tail tube top packer

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing.

[0020] figure 1 A metal expandable liner top packer is shown, which is especially suitable for oilfield cementing operations. In the present invention, the direction from the wellhead to the bottom of the well is defined as the downward direction. That is to say, figure 1 The direction from top to bottom in is the downward direction.

[0021] The metal expandable liner top packer 100 according to the present invention comprises a tubular body 1 . A plurality of shoulders with different sizes can be provided on the body 1 to facilitate the installation of various parts on the body 1 . A portion of the body 1 along the axial direction is processed with an anti-retreat thread, the function of which will be described below.

[0022] In the upper end portion of the body 1 is installed a locking seat 2 . The locking seat 2 is fixedly connected to the body 1 via radial shear...

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Abstract

The invention provides a metal expansion type tail tube top packer used in oil field well cementing operation. The metal expansion type tail tube top packer comprises a tubular body, a locking seat installed on the periphery of the tubular body through a radial shear pin, a clamp spring installed on the tubular body and located on the downstream portion of the locking seat, a cone installed on the tubular body and located on the downstream portion of the clamp spring, an expansion sleeve which sleeves the downstream end of the cone, and rubber sleeves distributed on the periphery of the expansion sleeve, wherein an anti-receding thread is arranged on the periphery of the tubular body. The metal expansion type tail tube top packer can achieve a high emission circulation, can not be sealed in advance, has strong sealing ability and adaption ability, is used in site tail tube cementing, can greatly improve tail tube overlapping segment sealing quality, and effectively prevents oil, gas and water channeling phenomena from occurring.

Description

technical field [0001] The invention relates to an expandable packer at the top of a tail pipe, which is especially suitable for cementing operations in oil fields. Background technique [0002] At present, the liner hanger technology is relatively mature and there are various types of liner hangers, mainly including conventional liner hangers, rotating liner hangers and isolated liner hangers. [0003] For the isolated liner hanger, it provides a liner top packer on the basis of the conventional liner hanger. Therefore, after the hanger is set, dropped and cemented, the running tool can be lifted up and the setting unit on the running tool can be used to set the packer. Therefore, the annulus can be isolated and the cementing quality can be effectively improved. [0004] At present, the commonly used packer hangers are mainly the multi-plastic cylinder type and the single rubber cylinder type. However, the isolation range of these two types of isolation hangers is relati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/127
Inventor 马兰荣吴晋霞朱和明郭朝辉姚辉前
Owner CHINA PETROLEUM & CHEM CORP