LOCAL CORROSION MEASURING INSTRUMENT OF FIELD OIL AND GAS PIPELINES Russian patent published in 2020 - IPC G01N17/02 G01N27/20 

FIELD: measuring equipment.

SUBSTANCE: invention relates to ensuring trouble-free operation of field pipelines and can be used in systems for corrosion monitoring of their state. Field oil and gas pipelines local corrosion meter, comprising a matrix of two or more electrodes made from the same material as the pipeline and subjected to the same corrosion conditions, apparatus for measuring communication current between two or more electrodes of a matrix, apparatus for measuring noise of electrochemical current occurring in a matrix of electrodes, according to the invention further comprises a probe of a corrosion rate sensor which realizes an electrical resistance method, measuring transducer of corrosion rate sensor, which realizes electric resistance method, which together with previously specified means form measurement channel, processor, which inputs are connected to corresponding outputs of means for measuring communication current, means for measuring noise of electrochemical current and output of transducer of corrosion rate sensor, which realizes method of electric resistance. Number of measurement channels can be increased, and matrix of electrodes and probe of corrosion rate sensor are made flush with inner surface of pipeline.

EFFECT: high accuracy of estimating corrosion rate (general and local) for field conditions and ensuring invariance of the meter to the structure of the flow of the controlled medium transported through the field pipeline.

3 cl, 4 dwg