Real stress corrosion testing machine for tubes

Abstract

The invention discloses a real stress corrosion testing machine for tubes. The real stress corrosion testing machine comprises a main unit frame, a first stretching seat, a gas and liquid filling system, a stress loading component and a stress transmitting component; the main unit frame comprises two parallel side plates; the first stretching seat, the stress loading component and the stress transmitting component are respectively connected with the two side plates of the main unit frame via supporting rolling shafts, and the two side plates simultaneously support the supporting rolling shafts; the first stretching seat and the gas and liquid filling system are simultaneously connected with one end of a tube to be tested, and the stress transmitting component is connected with the other end of the tube to be tested; and the stress loading component is connected with the stress transmitting component via a force transducer, and the other end of the stress loading component is connected with the frame. The real stress corrosion testing machine for tubes can simulate high-temperature and high-pressure corrosion and stress environments of underground oil casings of oilfields, and tests the oil casings and oil tube joints under underground complex work conditions and in axial tensile stress states.

Description

technical field [0001] The invention relates to the field of pipe material stress corrosion testing, in particular to a pipe material physical stress corrosion testing machine. Background technique [0002] In recent years, as the development of my country's oil and gas fields continues to advance toward deeply buried resources, the development environment of oil and gas fields has become more and more harsh, and downhole oil and casing materials are also subject to more and more complex working conditions. The synergistic effect of high temperature, high pressure, highly corrosive medium, and high internal pressure and tensile stress makes the downhole tubing and casing corrode and seal poorly during the acidification, normal well opening and shutting production process. Problems such as abnormal rise in casing pressure are more prominent, causing production and safety accidents, causing huge economic losses, and seriously restricting the development of oil and gas fields. ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a physical stress corrosion testing machine for pipes, which solves the problem that the research on the corrosion law of oil and gas well downhole casings is limited to laboratory research due to the size of the equipment, and it is impossible to realize the test conditions. Meeting the temperature and pressure requirements of deep wells and ultra-deep wells

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