PUMP STATION FOR SIMULTANEOUS SEPARATE DEVELOPMENT OF RESERVOIRS IN WELL Russian patent published in 2010 - IPC E21B43/14 

FIELD: oil and gas production.

SUBSTANCE: station consists of tubing, of bucket rod string, of packer installed between upper and lower reservoir, of shank end with main channel communicated to under-packer space, and of bucket rod pump with two suction valves, one of which is connected with orifice in pump cylinder. An additional packer is arranged in wells with three developed reservoirs above the main packer. The shank end is equipped with an additional channel communicated with inter-packer space connected to a middle reservoir between the upper and lower reservoirs. The pump cylinder is furnished with the additional suction valve. One of the suction valves of the pump is connected to above-packer space, another one is connected with between-packer space via the additional channel of the shank end, and through the main channel of the shank end the third valve is coupled with under-packer space not communicated with another suction valve. When a plunger travels upward the third suction valve first facilitates entry of the low-pressure reservoir production into the cylinder. Further, when the plunger passes the first orifice in the cylinder there enters production of the middle-pressure reservoir, and upon passing the additional orifice in the cylinder communicated with the additional suction valve production of the high-pressure reservoir enters.

EFFECT: simultaneous separate development of three reservoirs, each under its own mode.

2 dwg