Pumps – Motor driven – Fluid motor
Patent
1979-09-24
1980-12-30
Taylor, Billy S.
Pumps
Motor driven
Fluid motor
91306, F04B 1700
Patent
active
042420571
ABSTRACT:
A diverse fluid pump assembly including a pair of parallel, reciprocating piston-cylinder, motor-pump combinations. The motor-pump combinations are oppositely arranged so that one is pumping while the other is charging. Motor reversal is accomplished through a unique, hydraulically actuated spool valve which is slaved to the common piston rods of the respective, tandem motor-pump combinations. The invention is intended for use primarily as a mud pump for oil well servicing or drilling rigs. Principal components are easily broken down for replacement because of wear and/or size considerations. In a preferred embodiment, the hydraulically actuated spool valve is hydraulically slaved to the motors to effect motor reversal. A unique floating stuffing box is provided on the motor side of each combination which accomodates lateral rod shifting while maintaining a fluid tight seal. The spool valve operates smoothly through five distinct stages during motor reversal thus eliminating any need for a pulsation dampener.
REFERENCES:
patent: Re25873 (1965-10-01), Rutherford
patent: 113725 (1871-04-01), Baxter
patent: 2371704 (1945-03-01), Nichols
patent: 2887955 (1959-05-01), Owen
patent: 3142258 (1964-07-01), Rutherford
patent: 3164325 (1965-01-01), Veum
patent: 3700360 (1972-10-01), Shaddock
patent: 3775028 (1973-11-01), Davis
patent: 3790310 (1974-02-01), Whelan
patent: 3846049 (1974-11-01), Douglas
patent: 4028014 (1977-06-01), Cocks
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