Pump, for conveying oil from deep boreholes, comprises screw spindle pump driven by submersible motor

摘要

Pump, for conveying oil from deep boreholes, comprises a screw spindle pump driven by a submersible motor. The drive spindle is formed as a sealing spindle to which several conveying spindles are assigned. Hydraulic support bearings on the conveying spindles receive the axial shift. The support bearings are connected to the pressure side via bypass lines. Pump, for conveying oil from deep boreholes, comprises a screw spindle pump driven by a submersible motor. The drive spindle (4) is formed as a sealing spindle to which several, preferably three, conveying spindles (5) are assigned. Hydraulic support bearings (8) are on the conveying spindles to receive the axial shift. The support bearings are connected to the pressure side (10) via bypass lines (9) having inlet openings (12) protected against wear particles by a sieve. Preferred Features: The conveying spindles protrude into an expanded pressure chamber (10) in which the inlet openings of the bypass lines are arranged with a filter (11). The pressure chamber has a triangular cross-section with rounded corners.