Patent ID: 6148914
Filing Date: 2000-11-21
Classification: E21B,F17C,G01N

Abstract:
A method of taking a hydrocarbon sample of a petroleum fluid, comprising providing at a location down an oil well from which a hydrocarbon sample is to be taken, an apparatus for taking a hydrocarbon sample, said apparatus comprising a receptacle having walls defining an internal leakproof chamber, a flexible, leakproof, and chemically inert sampling bag disposed inside and sealed from said chamber, means for introducing a hydrocarbon sample into the interior of said sampling bag; and means for removing and introducing a driving liquid into said chamber, a controlled volume of a driving being interposed between the exterior of the sampling and the walls of the chamber;drawing a volume of hydrocarbon at the location from which the sample is to be taken, though said means for introducing a hydrocarbon sample into the sampling bag by removing a predetermined volume of driving liquid from the chamber by said means for removing and introducing a driving liquid, the volume of driving liquid removed being equal to the volume of hydrocarbon drawn into the sampling bag.