INSTALLATION FOR SIMULTANEOUS SEPARATE OPERATION OF FOUR OIL FORMATIONS Russian patent published in 2010 - IPC F04B47/02 

FIELD: oil and gas industry.

SUBSTANCE: installation includes three cylinders of pumps having side valves with filters. Inside cylinders there located is complex plunger consisting of upper, middle and lower plungers. Upper and lower plungers have valves. Plungers are connected to column of rods and to each other by means of stocks having liquid flow channels. Upper cylinder is equipped with packer and connected on one end to tubing string by means of a sleeve, and on the other - by means of upper reducer to middle cylinder which is connected to lower cylinder by means of a connection pipe provided with a packer. To lower cylinder by means of lower reducer there attached is a polished shank which freely enters the polished cylinder of packer-cutter so that tightness of two lower formations is provided, and lower reducer has a valve and a filter. Packers isolate formations in the well, and valves with filters are located in areas for liquid removal from each formation. Valve with filter in lower reducer can be connected to area for liquid removal from middle formation between two lower packers, and valve of lower cylinder can be connected by means of a connection pipe to inner space of the polished shank.

EFFECT: oil production in four formations of one and the same well.

2 dwg