COMPRESSOR TO PUMPING UNIT FOR GAS REMOVAL FROM ANNULAR SPACE OF OIL WELL Russian patent published in 2020 - IPC E21B43/00 F04B35/01 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry and can be used for extraction of gas from annular space of well equipped with sucker rod pump. Compressor to pumping unit comprises cylinder and piston rod hinges attached to rocking machine and its support, pipeline connecting cylinder cavity with annular space, and discharge pipeline with appropriate suction and discharge valves. Compressor cylinder is partially filled with oil from below, and piston along perimeter tightly interacts with cylinder inner surface with possibility of reciprocating movement, separating cylinder into upper and lower chambers, communicated by bypass channel with valve, passing to upper cavity. Cylinder is made of differential, consisting of lower wide cylinder with lower cavity and upper narrow cylinder with upper cavity. Pipeline from annular space of well is interconnected with lower cavity. From below cylinder is equipped with coaxial cylindrical oil chamber. Piston from above is connected to rod, made stepped, consisting of upper and lower parts for corresponding upper and lower cylinders, equipped from below with cylindrical coaxial protrusion for oil chamber, with which it interacts when piston moves down relative to cylinder. Piston is equipped with a channel communicating the oil chamber and the upper cavity of the cylinder through the valve passing oil from the bottom upwards. Oil chamber is interconnected with the tank filled with oil through the oil valve passing inside the lower chamber and opening for the greater force than the other valves. Bypass channel can be equipped with a cooler.

EFFECT: increased reliability, in particular increased overhaul period due to lubrication of compressor moving mechanisms from above piston.

1 cl, 1 dwg