Wells – Guide for device or conduit – Surrounding existing device or tubing
Reexamination Certificate
2011-06-28
2011-06-28
Singh, Sunil (Department: 3672)
Wells
Guide for device or conduit
Surrounding existing device or tubing
Reexamination Certificate
active
07967065
ABSTRACT:
An example of a caisson system that surrounds a conductor that extends from a head member positioned above a water surface to below a mud line includes a caisson positioned about the conductor, the caisson having a lowest end; a lower centralizer connected within the caisson proximate the lowest end of the caisson; and a second centralizer connected within the caisson above the lower centralizer relative to the mud line; wherein each centralizer includes a plurality of bow members extending between a first and a second collar, the first collar immovably connected within the caisson and the second collar moveable relative to the first collar, and each bow member curving inward from the caisson defining a bore disposing the conductor.
REFERENCES:
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patent: 2515796 (1950-07-01), Phipps
patent: 3482408 (1969-12-01), Manning
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patent: 4198179 (1980-04-01), Pease et al.
patent: 4561802 (1985-12-01), Campo
patent: 4702321 (1987-10-01), Horton
patent: 4932811 (1990-06-01), Folding
patent: 5147148 (1992-09-01), White
patent: 6102626 (2000-08-01), Milberger
patent: 6422791 (2002-07-01), Pallini et al.
patent: WO91/10806 (1991-07-01), None
patent: WO02/095184 (2002-11-01), None
PCT International Search Report and Written Opinion mailed Mar. 23, 2009, for international application No. PCT/US2008/084614.
“Bud” Ehrlich Henry L.
Frank's Casing Crew and Rental Tools Inc.
Singh Sunil
Winstead PC
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