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Oil pipe and sleeve

A technology for tubing and casing, applied in the field of new tubing and casing, can solve the problems of high cost, unfavorable for large-scale popularization and use, and difficulty in processing non-API threads.

Inactive Publication Date: 2007-02-07
孟祥湖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-API thread processing is difficult and costly, which is not conducive to large-scale promotion and use
According to field data statistics, when API threads are used for oil well pumping, thread leakage causes the daily fluid production of each pumping well to decrease by 5-10%. The economic loss is huge

Method used

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  • Oil pipe and sleeve

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Effect test

Embodiment Construction

[0023] The male joint [2] of this technical solution is pre-thickened and processed, and then friction welded with the pipe body [7]. Since the male joint [2] is processed because of its short length, it is especially suitable for CNC lathe processing. The precision of thread processing is greatly improved, thereby improving the thread connection strength. The connection threads are all high-quality threads, and the female joint [1] is also processed by a CNC lathe, which is also a high-quality female joint [1]. The male joint [2] and the pipe body [7] are friction welded, the welding speed is fast, the reliability is good, and generally there is no defect in welding quality.

[0024] After the male joint [2] and the pipe body [7] are welded, the post-weld heat treatment system is implemented, that is, the high-temperature tempering treatment is carried out after welding, and the welding joint is subjected to 100% radiographic inspection, and then the inner and outer protruding...

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PUM

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Abstract

The invention relates to a new oil tube and muffle tube, wherein the invention uses API and thick screw connection at the connection between oil tube and muffle tube; and the inner and outer diameters of tube are same; the screw tail of API is arranged with O-shaped rubber ring and metal smooth protrusion sealing. The inventive oil tube and muffle tube have same anti-drawing strength and better sealing. And it is formed by mother connector, father connector, O-shaped rubber ring, O-shaped ring rubber coil groove, metal smooth protrusion, friction welding open, tube and API screw; the tube and the father connector use friction welding.

Description

technical field [0001] The invention relates to oil pipes and casings in the process of oil well completion and oil production. It provides a new type of oil pipe and casing with high-quality sealing and connection strength equal to the tensile strength of the pipe body when connected. Background technique [0002] In recent decades, the threaded connections of oil pipes and casings in various oil fields in my country have adopted API special petroleum threaded connections. API thread has the advantages of easy processing, convenient on-site matching of pup joints, low processing cost and adaptability to repeated make-up. However, with the increase of oil well drilling depth, the production of corrosive and high-pressure oil and gas wells, and the injection of high-temperature and high-pressure water vapor into heavy oil wells, the application environment of API thread is more severe and the application conditions are more severe. For example, when injecting steam into an o...

Claims

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Application Information

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IPC IPC(8): E21B17/00
Inventor 孟祥湖
Owner 孟祥湖