WELLHEAD SAMPLER FOR PRODUCTION WELL Russian patent published in 2006 - IPC E21B49/08 G01N1/10 

FIELD: oil production industry, particularly equipment to take gas-and-liquid mixture samples at well head.

SUBSTANCE: sampler comprises tubular body mounted in pressure pipeline at well head, sample taking chamber and shutoff member. The tubular body is thick-walled and has end parts made as truncated cones with lesser bases facing each other and communicated by channel having diameter equal to lesser base diameter. Larger cone bases have equal inner diameters and equal to pressure pipeline diameter. Coaxial side channels are created within the bounds of through channel of tubular body. Pipe for reagent, namely demulsifier supplying in well product, is installed in one side channel. Air-tight seat of shutoff member is installed in another channel having several steps so that the seat is located in larger step thereof. The shutoff member has corresponding conical surface for air-tight seat creation and is installed in sample taking chamber having discharge pipe. End part of shutoff member is connected with tubular body by threaded connection and is terminated in extension for socket key and groove for screwdriver receiving. To provide uniform state of well product inner conical body walls are provided with rigidly fixed blades, namely turbulators, secured in flow direction. Discharge pipe and sample taking chamber have caps to prevent unauthorized oil sampling or discharge thereof at well head.

EFFECT: increased reliability of information concerning formation products due to increased sample quality and extended functional capabilities due to possibility to combine device for chemical demulsifier reagent introduction in oil to be conveyed, prevention of unauthorized formation product production or discharge thereof at well head.

3 dwg