Underground self-expansion hanger

A self-expanding, hanger technology, applied in the direction of wellbore/well components, earthwork drilling, etc., can solve the problems of unsuitable for on-site storage, unsuitable for transportation, storage, etc. The effect of simplicity and high reliability

Inactive Publication Date: 2011-05-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of self-expanding packer vulcanized in the center pipe when encountering water and oil is not suitable for transportation and storage, and is not suitable for on-site storage

Method used

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  • Underground self-expansion hanger
  • Underground self-expansion hanger
  • Underground self-expansion hanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: Taking a downhole self-expanding hanger as an example, the present invention will be further described in detail.

[0019] refer to figure 1 The downhole self-expanding hanger of the present invention is mainly composed of a pipe body 1, a self-expanding rubber tube 2, a collar 3, a limit ring 4, a fastening bolt 5 and an inner bushing 6. Body 1 is 5 1 / 2 "API casing, the outer diameter is 139.7mm, the length is 6.4m. There are 5 1 / 2 "API standard external thread, a coupling 3 is threaded at one end of the pipe body 1.

[0020] Five self-expanding rubber cylinder assemblies are sheathed on the outer wall of the pipe body 1, and the self-expanding rubber cylinder assemblies are prefabricated in the factory by vulcanization process. refer to figure 2 . The self-expanding rubber cylinder assembly is composed of an inner bushing 6 and a self-expanding rubber cylinder 2, the self-expanding rubber cylinder 2 is vulcanized on the outer wall of the inne...

Embodiment 2

[0023] Embodiment 2: The main difference from Embodiment 1 is: the pipe body 1 is 2 7 / 8 "API oil pipe, the outer diameter is 72.6mm. There are 2 ends at the two ends of the pipe body 1 7 / 8 "API standard external thread. The inner diameter of the inner liner 6 is 73.2mm, and the outer diameter is 76.2mm. The thickness of the self-expanding rubber cylinder 2 is 18mm. The material used by the self-expanding rubber cylinder 2 is oil self-expanding rubber.

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PUM

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Abstract

The invention discloses an underground self-expansion hanger, which is applied to oil development. An oil pipe or a casing which is commonly used in an oil field and is accordant with the air pollution index (API) standard is adopted; the outer wall of a pipe body is sleeved with 3 to 10 self-expansion rubber barrel components prefabricated by a vulcanization process in a plant; each self-expansion rubber barrel component consists of an inner bush and a self-expansion rubber barrel; through holes are uniformly distributed on the wall of the inner bush; self-expansion rubber barrels are vulcanized in the through holes; on a using field, the self-expansion rubber barrel components are sleeved on the outer wall of the pipe body; the distances between two adjacent self-expansion rubber barrel components are the same; pipe bodies at the two ends of each self-expansion rubber barrel component are sleeved with a limiting ring respectively; and the limiting rings are fixed on the pipe bodies through fastening bolts. The underground self-expansion hanger has the advantage that: under the condition that the oil pipe is not extracted, the hanger is seated and sealed and is hung in the oil pipe for realizing a well completion process.

Description

technical field [0001] The invention relates to a downhole tool for oil development, which is a downhole self-expanding hanger. Background technique [0002] At present, as the development objects of oil and gas fields are gradually shifting to high temperature and high pressure, deep layers, unconventional resources, etc., higher requirements are put forward for well completion tools on site. The well completion technology using the hanger to suspend and seat the liner string has become an effective way to develop complex types of oil and gas resources. A number of patented, traditional mechanical structure hangers have been widely used in oil and gas well completion construction. CN2453119 introduces a mechanical slip track type oil well liner hanger, which belongs to the liner hanger used for oil drilling and cementing. The hanger consists of an upper tripping assembly, a middle sliding sleeve suspension assembly and a lower The composite rubber plug assembly consists o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B23/01
Inventor 童征沈泽俊高向前张国文王新忠郝忠献
Owner PETROCHINA CO LTD
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