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Non-contact type water soaked ultrasonic detection method and apparatus for detecting cracks in pumping rods

A crack detection, non-contact technology used in measurement devices, material analysis using sonic/ultrasonic/infrasonic waves, instruments, etc.

Inactive Publication Date: 2003-10-08
INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent 99232304.5 provides an "ultrasonic automatic detection device for sucker rods", which is small in size and suitable for on-site operation. It is clamped on the sucker rod, so the large-end avoidance device must also be considered, and the detection blind zone due to the avoidance action is also inevitable

Method used

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  • Non-contact type water soaked ultrasonic detection method and apparatus for detecting cracks in pumping rods
  • Non-contact type water soaked ultrasonic detection method and apparatus for detecting cracks in pumping rods

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Embodiment Construction

[0022] experimental device

[0023] Such as figure 1 As shown, of course, the device does not limit the present invention; the experimental device is mainly composed of four parts: probe travel mechanism, sucker rod support mechanism, flaw detection operation platform, crack monitoring alarm and data recorder. In addition, in order to meet the requirements of flaw detection in different length ranges, the experimental device is also equipped with two travel switches, one of which is used to change the scanning direction of the probe, and the other is used to stop and reset.

[0024] The probe traveling mechanism is composed of a line-focused ultrasonic probe (8), a probe bracket (3), an up-and-down adjustment mechanism (4), a focus adjustment mechanism (5), and a walking guide rail (7); the line-focus probe adopts a 7.5MHz, 30mm focal length, focal length Probe with a cable length of 6 mm. The probe (8) is fixed on the probe bracket (3) above the water tank (1). There is an a...

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Abstract

An uncontacted soaking supersonic crack detection method used in testing beam-pumping cracking characterizes in soaking supersonic probe and being tested beam-pumping in water in which the probe, the beam and wax wiper to not contact with each other in a gap for 2mm at least between the probe and the wax wiper, the beam rotates by itself and probe moves along the beam shaft to finish the test to the beam-pumping. The special device is composed of a probe moving unit, beam-pumping supporting unit, test-cracking operation platform, crack monitor alarm and a digit recorder.

Description

Technical field: [0001] The invention relates to non-destructive testing, and in particular provides a non-contact water immersion ultrasonic flaw detection method and a special device specially used for crack detection of sucker rods in oil fields. Background technique: [0002] At present, the oil production in all oilfields except for self-flowing wells is inseparable from the application of sucker rods. Usually, under the action of various loads, the sucker rods work continuously all year round, and they will always be fatigued, resulting in fatigue cracks and cracks. Stress concentration begins after generation, and continuous fatigue and stress concentration will accelerate crack growth, which will eventually lead to the fracture of the sucker rod. The consequence is to force the oil well to stop production, workover, etc., causing a series of economic losses. Generally speaking, the economic loss that may be caused by a broken rod is 120,000 to 200,000 yuan. According...

Claims

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Application Information

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Patent Type & Authority Applications(China)
CPCG01N2291/044
Inventor 蔡桂喜冯玮高俊武董瑞琪柳春图
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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