PACKER SEPARATION DEVICE FOR WELL RESERVOIR OPERATION (VARIANTS) Russian patent published in 2007 - IPC E21B33/12 

FIELD: hydrocarbon production, particularly sealing or packing boreholes or wells.

SUBSTANCE: device comprises pump, one or several mandrels with removable valves to provide medium flow, nipple for removable valve and one packer installed over reservoir or between reservoirs or several mechanical, hydraulic, hydromechanical or impulse packers arranged over reservoir or between reservoirs in any combination. All above components are connected to pipe string with opened or sealed lower end and are sunk in well. At least one packer is connected with one or several members, namely with anchor, telescopic connection, connector, stem or filter. Pump is freely or fixedly fastened to packer arranged below the pump and has case to isolate pump inlet from hole clearance and to provide communication thereof with pipe string interior. Mandrel is arranged over pump case. Mandrel has removable valve provided with through or blind axial channel and radial orifices or two opposite connection pipes having free or spring-loaded check valves. The check valves have limited strokes to prevent medium flow between reservoirs.

EFFECT: increased efficiency and reliability during simultaneous or alternate operation of several producing and/or injection reservoirs in each well drilled in multiply field, possibility to operate well in single reservoir.

37 cl, 22 dwg