OIL DISCHARGING UNIT Russian patent published in 2017 - IPC F04D3/02 F04D7/00 

FIELD: oil and gas industry.

SUBSTANCE: oil discharging unit comprises a cylindrical body (1) with radial suction channels (8) and a screw (2) designed in its lower part. The screw (2) is connected by shaft (3) to the hydraulic motor (4) positioned in the upper part of the housing (1). The unit has a seating unit (15) for longitudinal displacement and fixing of the barrel to a predetermined depth. Heating element (5) is mounted in front of the screw (2) in the lower part of the housing (1). Check valve (6) with a filter (7) is mounted in the open lower end of the housing (1). Cylindrical insert (9) is mounted inside the housing (1) forming an annular cavity (10) isolated from the pressure cavity (11) of the unit. The cavity (10) in the upper part communicates with a safety valve (13), the pressure cavity (11) via a bypass line (12). Additional radial end-to-end channels connecting the annular cavity (10) to the cavity of the barrel are mounted in the housing (1).

EFFECT: improving reliability and efficiency of the unit operation.

3 cl, 2 dwg