High-efficiency high pressure gas leak detection method

Abstract

The invention provides a high-efficiency high pressure gas leak detection method, comprising the generation process of high pressure tracer gas and the detection process of the leak tightness of a joint on a device or a pipeline by the high pressure tracer gas; in the generation process, a container is filled with quantitative tracer gas, then liquid with pressure is led into the container, and the liquid is used for compressing the tracer gas to facilitate the pressure of the tracer gas to be raised to a set pressure value so as to turn into constant pressure tracer gas; in the detection process, inner confined space and outer confined space are established on the joint to be detected on the device or the pipeline to be detected, the inner confined space is at least provided with an inlet for injecting the constant pressure tracer gas, the outer confined space is provided with a port which is connected with a detector, and whether the tracer gas leaking from the inner confined space exists in the outer confined space is detected by the detector. The invention finds a very reliable method for petroleum industry field high pressure gas detection and achieves the aim of field leak detection by combining various processes.

Description

technical field [0001] The invention belongs to the field of sealing performance detection of high-pressure pipe strings, especially the field of detection of sealing performance of tubing strings and casing strings in the oil and gas industry, and provides a method that can quickly increase the detection gas to high pressure or ultra-high pressure to detect the sealing of tubing strings and casing strings. The ultimate gas leak detection method. Background technique [0002] After the high-pressure pipeline is connected or repaired, it is often necessary to conduct a leak test on its connection or repaired parts. For example, in the oil industry, oil pipes, casings and their auxiliary tools are required to complete the transportation of oil and gas. Tubing strings and casing strings It is the tubing, casing and auxiliary tools connected together, which form the channel for oil and gas flow. This string of tubing is collectively called tubing string or casing string. In ord...

AI Technical Summary

Problems solved by technology

The above detection methods cannot be used on site, but only to check whether the connecting thread on the oil pipe or casing can meet the tightness after connection under the set high pressure, that is, to check whether the thread is qualified, but not to the actual connection on site. The tightness of the thread at the joint of the pipe string is tested. The laboratory test conclusion can only show that the connecting thread can achieve the required sealing degree, but it cannot ensure the actuality of the thread of the tubing or casing or the auxiliary tool that is lowered into the oil and gas well on site. The sealing condition is good

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