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Method for monitoring leak from oil gas pipe, and equipment

A technology for oil and gas pipelines and monitoring devices, applied in the direction of detecting the appearance of fluid at the leak point, using liquid/vacuum for liquid tightness measurement, instruments, etc., can solve the problems of complexity, rapid pressure wave attenuation, and low system sensitivity. , to achieve the effect of high sensitivity, prevention of oil and gas loss, and far-reaching social benefits

Inactive Publication Date: 2005-11-16
JIANGSU POLYTECHNIC UNIVERSITY
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AI Technical Summary

Problems solved by technology

Because these detection methods are affected by operating transients, the system sensitivity is not high
The flow of oil and gas gathering and transportation pipelines is a gas-liquid two-phase flow, which is very complicated, and the pressure wave attenuates quickly, so the above method cannot be used to detect leakage

Method used

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  • Method for monitoring leak from oil gas pipe, and equipment
  • Method for monitoring leak from oil gas pipe, and equipment

Examples

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Embodiment Construction

[0018] The inventive method is based on the principle of diffusion, such as figure 1 As shown, it uses an oil and gas pipeline leak detection tube to realize the detection of natural gas and oil vapor. The detector tube is characterized by high permeability to natural gas and oil vapors, but is impermeable to water. If petroleum vapor is present around the detector tube, the petroleum vapor will diffuse into the detector tube. The gas stream carries petroleum vapor through the pipe to the monitoring station, where the vapor concentration is determined by a hydrocarbon detector and a leak alarm can be issued in the form of a digital output.

[0019] The device described in this embodiment is as figure 1 Shown consists of three parts:

[0020] The detection tube (4) is a cellulose acetate film tube with selective permeation characteristics. One end of the detection tube is connected to the suction port (3). The suction port is equipped with a drying device with a silica gel d...

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Abstract

A leakage detection device of oil -gas piping is composed of a leakage detection tube made of acetate film having selective permeation feature, drying unit with silica gel dryer and carbon filter at one end of tube and monitoring station at another end of tube. Its detection method includes detection natural gas and petroleum vapour by leakage detection tube, using air flow to bring petroleum vapour to monitor station through the tube and using hydrocarbon detector to determine vapour concentration in said station as well as sending out leakage alarm in digital output form if it is necessary.

Description

technical field [0001] The invention belongs to oil and gas storage and transportation technology, in particular to an oil and gas pipeline leakage monitoring method and its device, which has high sensitivity and can be used for leakage monitoring of crude oil, refined oil and natural gas pipelines, and can also be used for leakage monitoring of oil and gas gathering and transportation pipelines . Background technique [0002] At present, the real-time monitoring system of pipeline leakage at home and abroad detects the leakage by detecting the abnormal state caused by the leakage. Among them, the flow balance method and the pressure difference method are based on the conservation of matter and energy to judge the occurrence of leakage, and cannot be located; the stress wave method uses the stress wave that propagates along the pipe wall caused by the fluid leakage to judge the leakage and location, and the outer package Layer or buried pipeline stress wave signal attenuate...

Claims

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Application Information

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IPC IPC(8): G01M3/04
Inventor 王树立赵会军李恩田周诗岽赵书华
Owner JIANGSU POLYTECHNIC UNIVERSITY
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