WELL PUMP FACILITY FOR OIL PRODUCTION AND WATER INJECTION TO STRATUM Russian patent published in 2008 - IPC E21B43/00 E21B43/38 

FIELD: mining.

SUBSTANCE: production facility includes plunger pumps that can be positioned in a well in sequence. Well head pump drive is capable of reciprocating. Each of the plunger pumps has inlet and outlet devices with coupling rods. The facility also includes packer that can be positioned between strata, the upper stratum being a water-encroached productive formation for water, oil and gas mix production, and the lower one serving for water intake. Inlet hole is placed below the upper pump and made in the form of cylindrical vessel with water-repellent coating inside, upper side orifice and upper pump inlet jet inserted inside hermetically from above. The lower pump represents a cylinder inserted hermetically to channel of the packer with hollow plunger, the coupling rod of which is hollow and is rigidly connected to the cylindrical vessel. Inlet orifice of the lower pump includes two devices, the first being a channel connecting hollow coupling rod to the vessel, and the second a jet stopped from above with a side channel in the upper part to connect the hollow coupling rod to the inlet jet of the upper pump above the vessel. Ring section area between the inlet jet and the vessel is selected in such a manner that maximum speed of water oil mix flowing down at this section exceeds oil floating speed not more than by the factor of two, and minimal inlet jet volume between the side channel of stopped jet and the upper pump comprises at least half a volume of fluid supplied to the upper pump by suction.

EFFECT: improved quality of well separation of water, oil and gas mix into liquid phases and reduced cost of power with possibility of adjustable oil withdrawal from well.

1 dwg