20100018287 | WIRLELINE DOWNHOLE GAS CHROMATOGRAPH AND DOWNHOLE GAS CHROMATOGRAPHY METHOD - This invention relates to the devices used in the oil and gas industry. Disclosed herein is the use of a high resolution gas chromatograph in the borehole for borehole fluid type determination in real time mode. The Wireline Downhole Gas Chromatograph comprises a sample chamber with a piston position sensor, the chamber being connected through the sampling valve to the pipeline and through oil pump to hydraulic oil pressure compensation tank; an electric thermostat with a temperature sensor and a chromatograph tube installed inside the thermostat, one side of tube is connected in series through a rotating sample injector, a zeolite filter, a first check valve and a chromatograph isolating valve with a line connecting said sampling valve and said sample chamber, and the other side of tube is connected in series to a second check valve, a fraction detector, a sample portion cylinder and a second pressure gage, wherein said rotating sample injector is connected in series to a pressure reducer, a transporting medium valve, a compressed nitrogen cylinder and a first pressure gage; a bypass line with a bypass valve is connected in parallel to said rotating sample injector, said chromatograph tube and said fraction detector, and the electronic telemetry loop is connected to the output of said fraction detector. | 01-28-2010 |