Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2005-02-15
2005-02-15
Tucker, Philip C. (Department: 1712)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S119000, C507S123000, C507S124000, C507S125000, C507S145000
Reexamination Certificate
active
06855671
ABSTRACT:
A drilling system fluid and method of using same. The drilling system fluid comprises water as a continuous phase, an amount of a multivalent metal, and a quantity of a water soluble polyacrylamide copolymer having a charge density of at least about 1%. In a preferred embodiment, the fluid also comprises a second amount of a monovalent salt effective to increase gas hydrate suppression and decrease density when compared to a fluid consisting essentially of only a divalent salt in the absence of the monovalent salt.
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Evans Frank E.
Jarrett Michael A.
Norfleet James E.
Potts Patricia A.
Xiang Tao
Baker Hughes Incorporated
The Morris Law Firm P.C.
Tucker Philip C.
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