Underground gas storage well safety status grade evaluation method

A level assessment and safety level technology, applied in the direction of measuring devices, instruments, fluid tightness testing, etc., can solve the problems of underground gas storage wells such as lack of pertinence, poor applicability, and lack of operability, so as to achieve economical efficiency Effects related to safety, ensuring safe use, and avoiding over-inspection or under-inspection

Active Publication Date: 2017-08-18
四川省特种设备检验研究院
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Problems solved by technology

It solves the shortcomings of the existing safety status evaluation methods, such as lack of pertinence, poor applicability, and lack of operability for underground gas storage wells

Method used

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  • Underground gas storage well safety status grade evaluation method

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Embodiment

[0082] An underground gas storage well, through external macroscopic inspection, there is no leaking or sinking well, the safety status of the project is grade 1; after the inspection of the wellhead thread, 2 threads are damaged, the safety status of the project is grade 4; Inspection, there is no problem, the safety status of the project is level 1; underground TV inspection, it is found that the scale is fully covered without any rust, the safety status of the project is level 1; the internal inspection of the gas storage well shows that there is no crack, the The safety status level of the project is level 1; the ultrasonic thickness measurement of the gas storage well, after passing the 3-year residual wall thickness strength check, the safety status level of the project is level 4; the inspection of the cementing data found that no cement cementing was carried out but the cementing was carried out. Reinforced concrete is reinforced and passed the reinforcement strength ch...

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Abstract

The present invention discloses an underground gas storage well safety status grade evaluation method. The method comprises the steps of making the concrete test evaluation items, wherein the evaluation items comprise the external macroscopic situation, the wellhead thread corrosion damage, the material, the internal corrosion, the external corrosion thinning, the crack, the well cementation, a pressure-tight test and an air-tight test; according to the test situations of the items, evaluating separately, and taking the lowest item grade as the gas storage well safety status evaluation grade. The underground gas storage well safety status grade evaluation method solves the disadvantages that a conventional fixed pressure container safety status evaluation method lacks pertinency for the underground gas storage wells, is not strong in applicability and lacks operability.

Description

technical field [0001] The invention relates to the technical field of pressure-bearing special equipment, in particular to a method for evaluating safety status levels of underground gas storage wells. Background technique [0002] Underground gas storage well is a unique technology in my country. It is an underground vertical tubular pressure-bearing equipment with the characteristics of pressure vessels, gas cylinders, oil and gas wells, and pressure pipelines. The working pressure reaches 25MPa. It belongs to high-pressure vessels and is mostly used for urban vehicles. Natural gas filling or civil peak shaving station. With the increase of the service life of gas storage wells, underground gas storage wells begin to fail or be damaged, mainly in the form of CNG leakage, casing corrosion and thinning, casing bursting, and aboveground wellhead device running up or casing sinking. It is very necessary to conduct regular safety inspection and safety performance evaluation of...

Claims

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Application Information

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IPC IPC(8): G01D21/02G01B17/02G01M3/00G01M13/00G01N33/00
CPCG01B17/02G01D21/02G01M3/00G01M13/00G01N33/00G01N33/0081
Inventor 陈文杰熊荣
Owner 四川省特种设备检验研究院
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