Online continuous-oil-pipe nondestructive testing equipment based on flux leakage and ultrasound

Abstract

The invention relates to online continuous-oil-pipe nondestructive testing equipment based on flux leakage and ultrasound. The online continuous-oil-pipe nondestructive testing equipment comprises a casing body (1). A flux leakage testing unit (2), an ultrasound testing unit (3) and a length measuring unit (4) are arranged in the casing body (1). Inlet and outlet openings (1-2) which are used for inlet and outlet of a continuous oil pipe are arranged at the front end and the rear end of the casing body (1) respectively. A guide sleeve (1-3) is mounted in each inlet and outlet opening (1-2). The online continuous-oil-pipe nondestructive testing equipment has the advantages that the high magneto-conductivity of the steel continuous oil pipe is utilized, an axial superstrong magnetizing field is applied to the steel continuous oil pipe by a through-type permanent-magnetic magnetizer, longitudinal and transverse defect leakage magnetic fields on the body of the pipe are stimulated, leakage magnetic field information is captured by a high-sensitivity magnetic sensing element, and all-directional testing of defects on the continuous oil pipe is achieved.

Description

technical field [0001] The invention relates to the field of petroleum equipment and instruments, and more specifically relates to an online non-destructive testing equipment for coiled tubing based on magnetic flux leakage and ultrasonic waves. Background technique [0002] Due to the harsh working conditions of the coiled tubing, complex and diverse failures are prone to occur, which will eventually cause changes in the wall thickness and ellipticity of the coiled tubing, and also cause crack defects in the tubing, resulting in a reduction in the service life of the coiled tubing and reduced operating efficiency . If the defect area can be found in advance and corresponding remedial measures can be taken, the safety risk of well site operation and economic loss can be reduced. Therefore, it is necessary to conduct comprehensive on-line detection of coiled tubing damage. The coiled tubing testing equipment commonly used at present either has a single function and can only...

AI Technical Summary

Problems solved by technology

The coiled tubing testing equipment commonly used at present either has a single function and can only detect crack defects, or can only detect wall thickness and ellipticity; The working condition of the tubing is poor, and the vibration and speed changes of the tubing affect the detection structure

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