DOUBLE-LIFT DEVICE MEANT FOR SIMULTANEOUS SEPARATE WELL FORMATION OPERATION Russian patent published in 2009 - IPC F04B47/02 

FIELD: oil and gas industry.

SUBSTANCE: device is meant for being used in oil industry, and namely in equipment intended for lifting the fluid out of wells for simultaneous separate operation of formations in the well with oil-well pumps. Device consists of a packer separating formations in the well, long and short flow columns, two oil-well pumps, double-shaft wellhead equipment and two surface drives of oil-well pumps, which are located opposite each other. Oil-well pump drives consist of a support frame, a rack, a motor, transmission and mechanism which converts the motor rotational movement into back-and-forth movement of a flexible output link connected to a stem. Frames are installed on the base with guides, which is located on the foundation. Frames are made so that they can interact with the guides, and drives of oil-well pumps can move along them in a longitudinal direction to the sides from the well. Racks of oil-well pump drives are connected to each other with a detachable link which fixes position of oil-well pump drives in operating position.

EFFECT: simplifying installation of drives, improving operating reliability of the device, providing certain conditions required for repair work, and providing the possibility of improving oil-well pump capacity under restricted well diameter conditions by increasing travel length of surface drives without sharp increase in their dimensions and weight, and by reducing foundation loads.

3 cl, 3 dwg