Subsurface stuffing box assembly

F - Mech Eng,Light,Heat,Weapons – 04 – B

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166/27

F04B 47/00 (2006.01) E21B 23/02 (2006.01) E21B 33/10 (2006.01) F04B 47/02 (2006.01)

Patent

CA 1276102

ABSTRACT OF THE DISCLOSURE A method and apparatus for pumping high viscosity fluids such as viscous crude oils using a reciprocating pump powered by a reciprocating rod string where friction between the viscous fluid and the rod string and the resulting flotation effect are reduced greatly or substantially eliminated.

534993

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