Wells – Expansible anchor or casing – Fluid pressure actuated
Patent
1976-04-29
1977-06-21
Novosad, Stephen J.
Wells
Expansible anchor or casing
Fluid pressure actuated
166 63, 166 57, 166177, E21B 4326, E21B 2304
Patent
active
040305473
ABSTRACT:
Apparatus and method for cryogenic flash freezing of confined water in a rock formation with concomitant fracturing of the rock formation utilizes an anchoring device comprising gripping means actuatable responsive to release of pressurized gas effected by opening a valve responsive to the firing of an explosive charge in combination wih an elongated container for a cryogenic liquid so that the anchoring device may be positioned with said container depending therefrom in a hole in the rock formation and so that cryogenic liquid so held in position may be forcefully discharged from the container upon opening a valve responsive to the firing of an explosive charge for injection into water confined in the hole or in a cavity or crevice in the surrounding rock formation, the location of water to be flash frozen, if desired, being accomplished by a plug adapted to be fixed in place at different positions and to retain water thereon when fixed in place.
REFERENCES:
patent: 2279676 (1942-04-01), Hart
patent: 2303727 (1942-12-01), Douglas
patent: 2441894 (1948-05-01), Mennecier
patent: 2523608 (1950-09-01), Bell
patent: 2843052 (1958-07-01), Andrus
patent: 3244232 (1966-04-01), Myers
patent: 3253854 (1966-05-01), Hollander, Jr.
patent: 3430698 (1969-03-01), Urbanosky
patent: 3599712 (1971-08-01), Magill
Novosad Stephen J.
Parsell Richard K.
Shuffman, executrix Rose
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