GROUND POWER UNIT OF DEEP-WELL PUMP, MOSTLY HYDROPISTON OR JET, FOR LIFTING OF FLUID FROM WELL WITH APPLICATION OF WORKING FLUID ENERGY Russian patent published in 2009 - IPC F04B47/04 

FIELD: engines and pumps.

SUBSTANCE: invention is related to the field of oil production and may be used in operation of oil producing wells equipped with deep-well hydropiston or jet pumps, energy transfer to which from ground units is realised continuously by moving flows of working fluid. Unit consists of pumping unit 2, installed on frame 3 and power piston (plunger) pump 4, device 5 for working fluid preparation, and also system of pipelines that combine them into whole. Two concentric columns of oil-well tubing (OWT) 6 and 7 are lowered in operating well 1, from which internal column 6 is intended for supply of high pressure working fluid into deep-well unit. It consists of deep-well piston hydraulic engine 8 and deep-well hydropiston (or jet) pump 9. Comprises external column OWT 7. Prepared working fluid via low pressure pipeline 12 arrives to suction 13 of power pump 4 and further to operating well 1. Gas and remaining fluid - via pipe 14 in oil-collecting header. Under frame 3 power piston pump 4 is rigidly fixed. Suction part 13 of power pump 4 is connected to low pressure working fluid pipeline 12, and discharge 21 of power pump 4 is connected to OWT column 6. Hydraulic engine 8 has rigid connection to pump 9. Pumping unit 2 is equipped with doubled rope suspension 30, which via suspension 31 is connected by flexible joint 32 to guide unit 33 and is rigidly fixed in it by one end in fixator 34. Polished stem 20 via clamp 35 is also connected by paired flexible double connection 36 with guide unit 33. On external surface of guide unit 33 there are three grooves. The middle one is intended for winding-unwinding of flexible joint 32, and two side ones - for winding-unwinding of flexible joint 36.

EFFECT: increases efficiency and reliability of operation of ground power unit of deep-well pumps in oil-producing wells with different, including low, volumes of oil production, due to provision of production mode control, with simultaneous reduction of its wear and increased reliability of the whole unit.

22 cl; 4 dwg