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08-10-2010, 10:13 AM

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B. S. Zakharov

It is shown that when sucker-rod pumps are used, fluid leakage in seals of plunger-cylinder and valve pair
through hole and radial slot is proportional to the area of the flow section and is also dependent on the
shape of the latter. A new type of mechanical seal has been developed that reduces leakage significantly
and increases efficiency and nonfailure operating life of piston or plunger pumps.
The key operational parameters of sucker-rod pumps are delivery and nonfailure operating life that is generally
linked with a marked reduction or cessation of delivery. In most cases, this happens due to leakage in the worn-out joints of
seals of plunger-cylinder and valve pair, so determination of leakage through the seal and pressure loss (hydraulic resistance)
is of high importance.


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