ELECTRICALLY DRIVE PUMP UNIT FOR OIL EXTRACTION AND FLUID INJECTION IN BED Russian patent published in 2013 - IPC E21B43/14 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed unit comprises electrically driven rotary pump with extra section arranged under downhole motor at common shaft and having channel in the case for bottom bed fluid escape into well behind-the-packer space, hydraulic protection, intake pipe for bleeding of bottom bed fluid with packer arranged between top and bottom beds. In compliance with this invention, inlet pipe is arranged between fluid bleed pipe and extra pump section. Said inlet pipe terminates in flow plunger and had baffle above which channel for intake of broken associated water is located to feed said water to pump extra section intake. Channel communicated with extra channel outlet via flat tube is arranged under said baffle. Intake pipe has the cylinder to make with said plunger a pair of friction and terminating in separation funnel. Note here that said separation funnel is located above the channel receiving broken water in inlet pipe.

EFFECT: higher efficiency.

4 dwg