F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/142
F04B 47/02 (2006.01) F04B 47/04 (2006.01)
Patent
CA 1163501
ABSTRACT OF THE DISCLOSURE A reciprocating apparatus for use in pumping wells having well-head apparatus including a polish rod comprises a precharged device for applying a precharge pressure to a fluid, a first pump for pumping the fluid and adding a cumula- tive pressure to the precharge pressure and a cylinder in com- munication with the first pump for receiving a working pressure and adapted to operatively connect with the polish rod sup- porting a mass within the well, whereby such working pressure applies a working force to the cylinder to move the polish rod. A pilot device reverses the fluid flow from the cylinder to the precharge device, the mass applying a recharging pres- sure to the reversed fluid as the reversed fluid flows from the cylinder to the first pump, which applies a second cumula- tive pressure to the recharging pressure. The pilot device includes a second pump for substantially eliminating any un- expected cavitation of the first pump.
384468
G. Ronald Bell & Associates
Hydro-Horse Inc.
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