A centering opening and closing detection device for detecting the outer wall of a pipeline by a rotating electromagnetic field

Abstract

The invention discloses a centering opening and closing detection device for detecting the outer wall of a pipeline with a rotating electromagnetic field, and relates to the technical field of non-destructive testing of rotating magnetic fields. It includes an excitation probe and a torsion receiving coil. The array is fixedly installed with an integer multiple of three excitation coil bobbins, and three-phase excitation coils are wound on the excitation coil bobbin; the torsion receiving coil includes a cylindrical torsion receiving coil casing and a torsion receiving coil bobbin, and the torsion receiving coil bobbin is helical and adopts flexible materials. The outer wall of the torsion receiving coil casing is provided with a torsion receiving coil slot matched with the torsion receiving coil skeleton; the excitation probe shell and the torsion receiving coil casing are connected by two half cylinders through the connection The components are detachable and connected, and the excitation probe is sleeved on the outside of the torsion receiving coil; the device is convenient to open and close, can be accurately centered relative to the pipeline, and has extremely high detection efficiency and detection accuracy.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing of rotating magnetic fields, in particular to a centering opening and closing detection device for detecting the outer wall of a pipeline with a rotating electromagnetic field. Background technique [0002] In the process of oil production, coiled tubing plays a very important role. It is a downhole channel used for oil and gas, water injection and other operations, and is reusable. Coiled tubing is subjected to harsh working environments such as stretching and fracturing in the operation of oil extraction, which is of great significance to the smooth development of oil fields. Although its application is very simple, it also has unavoidable defects. After a long time of use, the tubing will be corroded by some corrosive substances for a long time, resulting in the occurrence of tubing defects, resulting in the coiled tubing in the The overall usable rate after a certain number of...

AI Technical Summary

Problems solved by technology

The rotating electromagnetic field non-destructive testing method can realize non-contact and fast detection, is less affected by lift-off, and can realize accurate circumferential positioning of defects. The conventional rotating electromagnetic field pipeline detection probe is a closed loop inner penetrating type, which is to be tested during detection The pipe is injected into the closed loop detection probe from the end, which can only realize the factory inspection of the pipe. Once the pipe is put into use or installed with a joint, the conventional internal penetration probe cannot be opened to cover the pipe under test, so the detection of the pipe cannot be realized.

In addition, the conventional probe has no centering device design, and only relies on the inner circle of the excitation device that generates a rotating electromagnetic field to constrain the measured pipeline, resulting in excessive lift-off vibration during the detection process, which affects the detection effect, and it is necessary to design and manufacture suitable for pipes with different diameters. Equipped with a detection device, which makes the adaptability and versatility of the detection device very low

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