DOWNHOLE SUCKER-ROD PUMP UNIT FOR OIL PRODUCTION IN CONDITIONS OF HIGH GAS FACTOR Russian patent published in 2024 - IPC E21B43/38 F04B47/02 

FIELD: pumps; mining.

SUBSTANCE: device is intended for use in oil industry. Downhole sucker-rod pump unit for oil production in conditions of high gas factor consists of sucker-rod pump, sucker rod strings, tubing string and packer located above productive formation. Between the packer and the sucker-rod pump, an external tubing pipe and a branch pipe equipped with a prismatic deflector are arranged in series and connected to each other. External pipe of the tubing string is equipped with an eccentrically located internal suction pipe fixed by means of welding to the external pipe of the tubing string in the outlet hole made on the side surface of the external pipe of the tubing string and covered by the upper guide casing directed by the open part to the wellhead. In the lower part of the external pipe of the tubing on the side surface located on one side with the outlet hole, there are filtration holes covered by the lower guide casing, which is directed by the open part to the packer. Lower end of the inner suction pipe is interconnected with the below-packer zone, and the upper end with the above-packer zone.

EFFECT: improves the efficiency and reliability of the downhole sucker-rod pumping unit for oil production under conditions of high gas factor.

2 cl, 1 dwg