METHOD TO OPTIMISE OIL PRODUCTION Russian patent published in 2008 - IPC E21B43/00 

FIELD: petroleum industry.

SUBSTANCE: invention is referred to production from oil reservoirs be operation of wells and mainly related to equipment used to lift fluid to the surface. The method ensures simpler process operations and less cost of equipment required to transfer the fluid. Essence of the invention consists in installation and start up of downhole pump that deliver fluid product to the surface via pipeline. According to the invention, at least two piston pumps with rods interacting with a couple of eccentric rams are installed parallel on turning shaft, with pumps pistons being in opposite phases of the operating motion cycles. Work spaces of the pumps are connected by pipeline branches with the tank provided with hydraulic drive liquid. Pipelines are connected to the top part of the tank and hydraulically actuated valves and then with pumps work spaces. Hydraulically actuated valves with uniform pressure of hydraulic liquid are used to supply hydraulic liquid via pipelines to intake spaces of the pump provided with the rod in the cover connected with diaphragm of the working space equipped with discharge pipeline and intake pipeline with hydraulically actuated valves from the housing side. The said hydraulically actuated values are used to control oil intake and discharge performance. The tank with hydraulic liquid and pipeline provide compensation losses of hydraulic liquid in the pump spaces in the chambers adjacent with the rod. Axial stroke of the cup to bypass ports of the pipelines match the reciprocating axial movements of the piston installed on the rod.

EFFECT: simpler process operations and reduced cost of equipment required to transfer the fluid.

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