Patent ID: 8910718
Filing Date: 2014-12-16
Classification: E21B

Abstract:
1. A system for producing oil, comprising: a submersible pump; and a motive unit to power the submersible pump, the motive unit being a single device with a motor section and motor protector section to seal the motor section from surrounding fluid and to accommodate thermal expansion of an internal lubricating fluid during production of oil, the motive unit comprising a plurality of bearings, the motor section comprising a motor section shaft and the motor protector section comprising a motor protector section shaft, at least one of the motor section shaft and the motor protector section shaft extending longitudinally from an outer housing so the motor section shaft and the motor protector section shaft become axially affixed to each other with respect to a longitudinal axis of the motive unit to form a joint which is axially locked against separation that would otherwise occur due to the weight of the motor section, wherein the outer housing is longitudinally movable with respect to the joint such that after axially affixing the motor section shaft and the motor protector section shaft the outer housing is moved longitudinally to enclose the joint once the joint is axially locked.