SYSTEM AND PROCEDURE FOR SAMPLING WELL FLUID MEDIUM Russian patent published in 2011 - IPC E21B49/08 

FIELD: gas and oil production.

SUBSTANCE: system consists of logging string arranged in well, of sampling tool connected to logging string and equipped with chamber for sample, of movable element installed in chamber for separation of buffer fluid medium from test fluid medium and of chamber of low pressure. Also, withdrawal of buffer fluid medium from the chamber for sample creates difference of pressure causing transfer of the movable element and inflow of tested fluid medium into the chamber for sample through a suction device selectively opened for well fluid medium surrounding the sampling tool. The system also includes a start-up device connecting an appliance with electric drive and arranged in the low pressure chamber. It is designed for selective actuation of the sampling tool for inflow of well fluid medium sample into the sample chamber from surface.

EFFECT: selective actuation of sampling tool and its installation in any place of logging string from surface.

26 cl, 7 dwg