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

An oil drill pipe and detection device technology, applied in the direction of material magnetic variables, etc., can solve the problems of high detection cost, damage detection probe, large detection blind area, etc., and achieve the effects of low lift-off effect, high sensitivity and small volume

Active Publication Date: 2009-10-07
CHINA NAT OFFSHORE OIL CORP +2
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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 dr

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

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Embodiment Construction

[0024] The specific implementation of the present invention will be described in detail below with reference to the drawings and specific examples.

[0025] Such as figure 1 , 2 As shown, the magnetic memory detection device of the present invention includes: a frame 1 and a detection ring 2, two detection rings 2, the detection ring 2 can be sleeved on the drill pipe 5, and the two detection rings 2 are respectively composed of two half-rings 21 . Of course, it is also possible to fan out or move laterally apart in order to open the two half-rings 21 , 22 . The two detection rings 2 are provided with magnetic memory sensors 6 for detecting the drill pipe 5. In this embodiment, the two detection rings 2 are respectively provided with 16 magnetic memory sensors 6 along the circumferential direction, so that the detection can be ensured in the There is no blind area in the circumferential direction; the frame 1 is also provided with a first drive device 3 for driving the fram...

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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...

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Application Information

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IPC IPC(8): G01N27/85
Inventor 李先兵曹式敬陈家福樊建春宋林松曾浩肖建业蔡子波杨春生
Owner CHINA NAT OFFSHORE OIL CORP
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