DOWNHOLE PUMP DRIVE (OPTIONS) Russian patent published in 2019 - IPC F04B47/06 

FIELD: oil industry.

SUBSTANCE: invention relates to oil-producing equipment and can be used to drive submersible plunger-type borehole pumps. Drive includes a housing, a submersible electric motor with hydroprotection, the drive shaft of which is connected to the screw of the transfer screw-nut rolling, which is in movable connection with the housing and connected to the rod sealed in the housing. Internal cavities of the housing are filled with oil and communicate through the elastic shell with the cavity of the well. Drive shaft of the electric motor is connected with the transmission of the screw-nut rolling through a reversible gearbox with a switching mechanism. Switching mechanism is made in the form of a thrust connected to the screw-nut rolling nut and reversing gearbox. Traction has a clamp extreme positions. Switching mechanism may also consist of an additional screw-nut transmission, installed between the screw-nut rolling transmission and the reversing gearbox, the nut of the additional gear is connected via a reversing gear through the pusher, the pusher has a lock of the extreme positions.

EFFECT: increased reliability and energy efficiency of the drive of downhole pump.

2 cl, 2 dwg