PLANT FOR OIL PRODUCTION WITH ONE PUMP FROM DIFFERENT INTERVALS OF HORIZONTAL WELLBORE (VERSIONS)

摘要

FIELD: oil and gas industry.;SUBSTANCE: plant comprises two shanks of different lengths coupled with the pump inlet, wherein one of the shanks is equipped with a side channel having a controlled piston valve connected to a rod with a piston of an actuating cylinder, the inner cavity of which is linked with the surface via a tube to move the piston by overpressure, to compress the recoil spring, and to overlap the side channel by cutting off the fluid produced from the well. Instead of the spring the fluid pressure in the pump outlet can be used to return the piston to the original state, for this the other cylinder cavity may be provided with another tube that communicates with the pump outlet. The shanks are lowered into the borehole in parallel, the short one is equipped with a controlled valve and the long one is provided with an inlet in the remote area of the horizontal wellbore. The long shank can be communicated with the pump inlet through an overflow duct connected with the piston valve body to open in overlapping the side channel of the short shank, an additional shank can be lowered into the well connecting the pump inlet to the middle area of the horizontal wellbore. The piston may be two-spring-biased, one of which is designed pre-compressed to about the middle of the working stroke of the piston.;EFFECT: increased efficiency of oil production with one pump from different intervals of the horizontal wellbore.;7 cl, 7 dwg