Oil and gas pipeline corrosion online monitor

A technology for oil and gas pipelines, corrosion monitoring, applied in the direction of material resistance, etc., can solve the problems of large influence of temperature measurement, low measurement accuracy, no temperature indication, etc., to achieve the effect of improving measurement accuracy, accurate measurement, and sensitive response
CN101846644BInactive Publication Date: 2012-05-09HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN Ā· China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2012-05-09
Estimated Expiration
Not applicable Ā· inactive patent

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Abstract

The invention discloses an oil and gas pipeline corrosion online monitor, which measures the corrosion of an oil and gas pipeline by an electric-resistivity method. The monitor comprises a resistance probe, a measurement circuit and a measurement data processing unit, wherein the resistance probe (1) comprises waterproof jacks (12), a sealing screw thread (13) and a probe shell (14); the upper part of the sealing screw thread (13) is connected with the waterproof jacks (12), while a lower part is connected with the probe shell (14) made from stainless steel; a built-in sensing element (15), which is a reference resistor Rf, and a built-in thermal resistor Rt (10) are arranged in the probe shell (14), and are positioned in an identical temperature environment; an exposed sensing element (16), which is a measured resistor Rx, is arranged out of the probe shell (14), and is directly exposed in a corrosion environment in the pipeline; and the built-in sensing element (15) and the exposed sensing element (16) are made from an identical material and have an identical temperature coefficient. The resistance corrosion monitoring device of the invention has the characteristics of quick response, continuous testing capacity, the capacity of sensitively detecting the small change of a corrosion state in the pipeline, high reliability and high data reproducibility.
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Description

technical field

[0001] The invention relates to the field of on-line corrosion monitoring of oil and gas pipelines, in particular to an on-line corrosion monitor for oil and gas pipeline resistance based on temperature compensation and contact potential compensation. High-precision online corrosion monitoring for any mixed medium of oil, water and gas. Background technique

[0002] With the development of large-scale oil and gas fields in my country, especially the continuous exploitation of high-pressure sulfur-containing and carbon dioxide-containing natural gas, higher requirements have been put forward for the safety of oil and gas fields. Corrosion monitoring, as a basic work of corrosion protection, has increasingly received business attention and attention. The resistance probe corrosion monitoring technology is to realize the online monitoring of the corrosion rate of the metal in the process medium by measuring the change of the resistance value of the metal sensiti...

Claims

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