Wells – Valves – closures or changeable restrictors – Operated by dropped element
Patent
1979-05-07
1981-02-24
Pate, III, William F.
Wells
Valves, closures or changeable restrictors
Operated by dropped element
166322, E21B 2302
Patent
active
042521963
ABSTRACT:
A control tool is provided which is insertable through a tubing string in a subterranean well for selectively transmitting fluid pressure through the tool in first and second fluid flow paths for application of the pressure to activate an auxiliary tool on the tubing string, the auxiliary tool typically having first and second piston chambers and piston means in communication therewith, the chambers receiving fluid pressure delivered through the control tool. The control tool comprises a cylindrical housing with means defining first and second selectively pluggable fluid ports thereon. One of the ports is communicable with the first piston chamber, with the other port communicable with the second piston chamber. First and second selectively pluggable fluid vent passageways are defined through the housing with one of the vent passageways being communicable to one of the piston chambers, and the other of said vent passageways being communicable to the other of the piston chambers. Seal plug means are insertable within one of the fluid ports and within each of the vent passageways to establish the first fluid flow path to direct fluid pressure to one of the chambers and vent fluid from the other chamber to shift the piston means in a first direction. The seal plugs also insertable within the other of the fluid ports and one of the vent passageways to establish the second fluid flow path to direct fluid passage to the other of the chambers and vent fluid from another of the chambers to shift the piston means in a second direction. The control tool is provided in a modified form with the passageways manipulatable to define flow paths such that the control tool transmits fluid to activate three separate functions.
REFERENCES:
patent: 3007523 (1961-11-01), Vincent
patent: 3802507 (1974-04-01), Watson
patent: 4089548 (1978-05-01), Gurley
Silberman Raphael J.
Smith Everett H.
Tilton Frederick T.
Baker International Corporation
Norvell, Jr. William C.
Pate III William F.
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