Pressure-balanced well service valve

Details Pressure-balanced well service valve Pressure-balanced well service valve

1976-06-11

1977-12-20

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Fluid operated

137529, E21B 4300

Patent

active

040635945

ABSTRACT:
A well service valve used primarily for the injection of closely controlled batches of well treating fluids into low pressure formations utilizes a biased one-way flow valve in a tubing string to hold the treating fluid in the column until the tubing is pressurized to open the valve and expose flow ports in the wall of the tubing to the formation. A partial pressure-balancing of the flow valve allows the use of a lower biasing force in the flow valve, thereby greatly increasing the reliability and useful life of the valve.

REFERENCES:
patent: 2033563 (1936-03-01), Wells
patent: 2268010 (1941-12-01), Baum
patent: 2757741 (1956-08-01), O'Reilly
patent: 3032111 (1962-05-01), Corley, Jr. et al.
patent: 3319717 (1967-05-01), Chenoweth
patent: 3796261 (1974-03-01), Nutter

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