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Subsurface Pump Working Principle .pdf


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Subsurface Pump-Working Principle

Subsurface pump is a special form of reciprocating pump. The power which can
let plunger of subsurface pump do reciprocating motion was transported from
ground to underground through sucker rod. That motion can lift oil to the ground.
When the piston upstream, the traveling valve will lock powered by tubing
pressure liquid column and discharge liquid produced in the process of movement of
piston stroke. At same time, the pressure in pump barrel behind piston is lower. The
liquid in the well unlock the fixed valve and enter the space caused by movement of
pump piston under the pressure of liquid column in the annular space.

When the piston down, the liquid in pump is compressed followed by its higher
pressure which equal to the pressure of liquid column in the annular space. Fixed
valve will closed by its gravity. When the piston down continuously, the pressure in
pump continues to rise. Until it is higher than column pressure, will the liquid lock
traveling valve and enter the oil pump.
With the up and down movement of piston, the traveling valve and fixed valve
continuously open and close alternately which make the liquid level in the pipe rise
until it reached wellhead into oil pipeline.
+86 182 3419 6903
http://www.torlinservices.com/

Subsurface pump is made up of pump barrel and plunger, oil inlet valve (suction
valve and fixed valve), valve (discharge valve or traveling valve). When the electric
oil pump stroke up, volume of pump under piston become more bigger and its
pressure is smaller. Oil inlet valve open under the action of the upper and lower
pressure. And crude oil enters into the inferior pump. At same time, valve lock
powered by the pressure difference. When stroke down, it operates with same
principle.

+86 182 3419 6903
http://www.torlinservices.com/


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