FIELD: hydraulic displacement machines; pumps and compressors.
SUBSTANCE: submersible well pump assembly has a pump housing with a pump discharge on the upper end. Pump barrel is located within the pump housing, defining an annular passage between the barrel and the pump housing. Plunger is reciprocally carried in the barrel. Motor mounted below the pump housing and operatively coupled to the plunger causes the plunger to reciprocate between an upstroke and a down-stroke. Valve and porting arrangement directs well fluid in the barrel below the plunger into the annular passage and out the discharge during a down stroke of the plunger. Valve and porting arrangement admits well fluid into the barrel below the plunger during the up stroke of the plunger. Connecting rod extends between the motor and the plunger. Connecting rod is in tension during the down-stroke.
EFFECT: technical result is higher efficiency of the submersible well pump.
20 cl, 18 dwg
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|---|---|---|---|
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