Underground self-expansion hanger

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...

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

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