Pumps – Motor driven – Relatively movable pumping members driven by relatively...
Patent
1982-01-28
1985-11-26
Gluck, Richard E.
Pumps
Motor driven
Relatively movable pumping members driven by relatively...
417346, F04B 1700
Patent
active
045552207
ABSTRACT:
A hydraulic intensifier for oil well fracturing and/or erosion drilling, having a pair of intensifier units including a pair of sequentially operated reciprocating ram assemblies powered by hydraulic cylinder motors which are operated to maintain a substantially uniform output fluid pressure from the intensifier unit. Each cylinder motor is supplied from a main source of hydraulic fluid under high pressure which operates on the working faces of the pistons of the cylinder motors. Hydraulic fluid is also supplied to the return face side of each piston in the hydraulic cylinder motor. The return face side of the pistons have a smaller operative area than the working face sides and each can be connected to the main source of supply of hydraulic fluid to the working faces so that as the pistons are driven to their extended positions by application of hydraulic pressure to the working face, the fluid on the return face side can be expelled from the cylinder motors and returned to the working face side to either reduce the fluid flow from the source while maintaining the same cycling rate or maintaining the same flow from the source by increasing the cycling rate and thus increasing the total volume flow. An adjustable pressure relief valve is provided to permit control of the pressure in the well to a maximum desired limit by relieving pressure of the infeed fluid to the hydraulic cylinder motors.
REFERENCES:
patent: 3773438 (1973-11-01), Hall et al.
patent: 3981622 (1976-09-01), Hall et al.
patent: 3994627 (1976-11-01), Calzolari
Hall Richard W.
Mahal Harbhajan S.
Sonnenberg Sven
Gluck Richard E.
Towler Hydraulics, Inc.
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