Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2005-05-03
2005-05-03
Tucker, Philip C. (Department: 1712)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S107000, C507S108000, C507S136000, C507S137000, C507S138000, C507S139000, C507S140000
Reexamination Certificate
active
06887832
ABSTRACT:
A method for drilling, running casing in, and/or cementing a borehole in a subterranean formation without significant loss of drilling fluid is disclosed, as well as compositions for use in such method. The method employs a drilling fluid comprising a fragile gel or having fragile gel behavior and providing superior oil mud rheology and overall performance. The fluid is especially advantageous for use in deep water wells because the fluid exhibits minimal difference between downhole equivalent circulating density and surface density notwithstanding differences in drilling or penetration rates. When an ester and isomerized olefin blend is used for the base of the fluid, the fluid makes an environmentally acceptable and regulatory compliant invert emulsion drilling fluid. The fluid preferably contains no organophilic clays.
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Burrows-Lawson Kimberly
Carbajal David
Kirsner Jeff
Siems Don
Halliburton Energy Service,s Inc.
Tripp Karen B.
Tucker Philip C.
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