Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2006-08-29
2006-08-29
Tucker, Philip (Department: 1712)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S129000, C507S135000, C507S140000, C507S237000, C507S239000, C507S259000, C507S271000, C507S272000, C166S305100, C175S072000
Reexamination Certificate
active
07098172
ABSTRACT:
A process to substantially reduce fluid loss in which an appropriate amount of a non-flowing gel of sufficient strength is emplaced to substantially eliminate or reduce loss of the drilling fluid. The gel composition of the process includes: (1) a non-cellulose containing copolymer having vinyl phosphonate co-monomer units which may be incorporated into the polymer by copolymerization with the other co-monomer(s) comprising the polymer or by grafting upon an already existing polymer or co-polymer, (2) a crosslinking agent active upon the phosphonate groups, (3) a crosslinking initiator comprising a Bronsted Lowry base or Lewis base and (4) an aqueous solvent.
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Growcock Frederick B.
Horton Robert L.
Ivan Catalin D.
Prasek Bethicia
Vian John W.
M-I L.L.C.
Richard Charles R.
Tucker Philip
White Carter J.
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