SUBSURFACE SAMPLER. Russian patent published in 2009 - IPC E21B49/08 

FIELD: oil and gas industry.

SUBSTANCE: invention is applicable to the oil industry and particularly to equipment used for formation testing in oil production. The sampler consists of a cylindrical housing containing a sampling module that includes a flow-type sample receptacle, valve gear, and magnetic separator strainer; hydraulic drive module including a cylindrical chamber, ballast chamber, piston, push rod, and solenoid valve; electronic module including power supply unit and set of physical metering sensors connected with an electric recording circuit. The solenoid valve is located inside the piston of the hydraulic drive module; the sampling module is additionally fitted with a sealed chamber with one end connected to the rod and the other end connected to the valve gear; and the electronic module is additionally fitted with a piston proximity sensor.

EFFECT: better quality of information measured, as well as simplified and more reliable operation of mechanism components.

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