BED FLUID SAMPLER Russian patent published in 2012 - IPC E21B49/08 

FIELD: oil and gas production.

SUBSTANCE: proposed sampler consists of fluid sampling system. Said system includes fluid sample taking and keeping valve, logical hydroelectric system for sampler locking and unlocking in well. Said system comprises motor connected to pump coupled with first distributor via first check valve, filter, safety valve and second distributor connected to tank, fluid sample taking and keeping valve, first, second and third pressure transducers. Note also that first distributor is connected to head ends of first, second and third hydraulic cylinders. Rod end of the latter are connected to third distributor connected with throttle and accumulator with fifth pressure transducer. In compliance with this invention, added fluid sampling rate control system comprises storage chamber connected with sixth check valve, fourth hydraulic cylinder via seventh check valve and proportional fluid flow rate regulator while sampling valve is connected with second, third, fourth, fifth and sixth check valves. Note also that fourth hydraulic cylinder, proportional flow rate regulator, fourth and fifth check valves are connected with the tank.

EFFECT: controlled fluid sampling rate, higher efficiency and quality.

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