Designing and manufacturing method and sealing method of sealing structure of oil well pipe joint

A sealing structure and manufacturing method technology, applied in drilling equipment, design optimization/simulation, casing, etc., can solve problems such as disappearance, oil well pipe joint leakage, thread loosening, etc.
CN110359858AActive Publication Date: 2019-10-22BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BC P INC CHINA NAT PETROLEUM CORP
Publication Date
2019-10-22

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Abstract

The invention provides a designing and manufacturing method and a sealing method of a sealing structure of an oil well pipe joint. The manufacturing method comprises the steps of according to a presetrule that a sealing performance evaluation parameter is larger than or equal to a corresponding sealing performance safety allowance of an oil well pipe, determining a sealing surface contact pressure stress, a sealing structure material elasticity strain capacity, sealing structure material strength and a sealing surface contact width of the oil well pipe; according to the sealing performance safety allowance of the oil well pipe, enabling the sealing structure material elasticity strain capacity to be larger than 0.5%; according to the sealing surface contact pressure stress, the sealing structure material elasticity strain capacity and the sealing structure material strength, determining a used material of the sealing structure; according to the determined sealing structure material elasticity strain capacity, determining the used material of the sealing structure as a hyperelastic alloy material with the elasticity strain capacity being larger than 0.5%; and manufacturing the sealing structure according to the used material and the elasticity strain capacity thereof. By utilizing the designing and manufacturing and the sealing method of the sealing structure of the oil well pipe joint provided by the embodiment of the invention, the reliability of a sealing performance of the oil well pipe joint is improved.
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Description

technical field

[0001] The application belongs to the technical field of oil and gas drilling and exploitation, and in particular relates to a design and manufacturing method and a sealing method of a sealing structure of an oil well pipe joint. Background technique

[0002] Oil well pipe is a special pipe for oil and gas production wells. It is connected by pipes with threaded joints and lowered into oil and gas wells to form a pipe string several kilometers long. In the stage of natural gas exploitation, the high-pressure natural gas in the downhole formation is transported to the ground through the pipe string, and the high-pressure natural gas flows from a dozen to one hundred MPa in the pipe, so the threaded joint of the oil well pipe must have sufficient gas tightness.

[0003] In the prior art, the sealing structure of the oil well pipe joint mostly uses a special threaded joint structure, and the special threaded joint structure of the oil well pipe is composed of tw...

Claims

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