CABLE DOWNHOLE GAS CHROMATOGRAPH AND METHOD OF DOWNHOLE GAS CHROMATOGRAPHY Russian patent published in 2010 - IPC E21B49/08 G01N30/02 

FIELD: oil and gas industry.

SUBSTANCE: gas chromatograph includes chamber for samples with piston position sensor, which is connected through sample valve to pipeline and through oil pump to reservoir for compensation of hydraulic oil pressure, electrical thermostat with temperature sensor and chromatograph tube located inside thermostat, which is in-series connected on one side through rotating sample injector, zeolite filter, the first return valve and isolating valve of chromatograph with connection line of sample valve and chamber for specimens, in-series connected on the other side to the second return valve, fraction detector, bottle with sample portion and the second pressure sensor. At that, rotating sample injector is in-series connected to pressure reducer, valve for transporting medium, bottle with compressed nitrogen and the first pressure sensor, bypass line with bypass valve is parallel connected to rotating sample injector, chromatograph tube and fraction detector, and circuit of electronic telemetry is connected to output of fraction detector. Method of downhole gas chromatography is proposed as well.

EFFECT: development of device allowing to perform gas chromatography for determining the type of well fluids in well in real time.

3 cl, 5 dwg