A magnetic memory detection device of oil drill rod micro-crack

Abstract

The invention discloses a magnetic memory detection device of oil drill rod micro-crack including: rack and testing ring. The testing ring is set up on the rack and can be installed on the drill rod. The testing ring has the magnetic memory sensor used for testing the described drill rod; the rack has the first driving device used to drive the rack move along the axial direction of the drill rod on the rack. The invention can achieve the non-contact non-destructive test on the micro-damage and stress concentration of oil drill rod in order to provide a basis for drill rod classification management. It mainly features: no special magnetic device, small size and light weight.

Description

technical field [0001] The invention relates to a drill pipe detection device, in particular to a magnetic memory detection device for oil drill pipe micro cracks. Background technique [0002] During the use of oil drill pipe, the stress state is very complicated. It has both static load and impact load, bears complex alternating loads such as tension, compression, bending, and torsion, and is affected by harsh environments such as high temperature, high pressure, and corrosion. The drill pipe will be damaged due to wear, corrosion, and fatigue. and fail. In recent years, with the development of the petroleum industry, drilling engineering has moved towards deep and ultra-deep wells, high temperature and high pressure and high H content in complex geological conditions. 2 S / CO 2 The development of the operating environment of sour gas makes the working conditions of the drill string more severe, and drilling accidents caused by fatigue damage of drilling tools are becomi...

AI Technical Summary

Problems solved by technology

[0005] However, there are two main disadvantages in the existing drill pipe detection device: 1. There is a large detection blind area, which cannot detect the thickened transition zone between the drill pipe joint and the pipe body. In order to meet the needs of avoiding joints in high-speed detection, in The design of the detection mechanism sacrifices the thickened transition zone of the drill pipe, and a large number of practices have proved that most of the damage to the drill pipe occurs in this area, so the phenomenon of missing detection is very serious; 2. The damage detection probe is easy to wear, because the detection tile is used Keep in contact with the high-speed moving drill pipe body, the service life of the detection probe is short, resulting in high detection cost

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