Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2006-08-22
2006-08-22
Gulakowski, Randy (Department: 1712)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S203000, C507S101000, C507S201000, C507S116000, C507S218000
Reexamination Certificate
active
07094736
ABSTRACT:
A method of separating from a mixture of oil-based drilling fluid and sample of formation hydrocarbon, the liquid component of the drilling fluid, which method comprises treating, e.g. chemically, the mixture in a way that selectively substantially affects the liquid component of the drilling fluid, producing one or more treatment products, while leaving the formation hydrocarbon substantially unaffected; and separating the treatment products from the formation hydrocarbon, by solvent extraction. The liquid component of the drilling fluid conveniently comprises one or more esters (which do not occur in significant quantities in naturally occuring formation hydrocarbons) and which can be hydrolysed to give water-soluble products readily removable from the formation hydrocarbon. The invention is applicable to sampling of formation hydrocarbon using wireline formation testers or sampling tools.
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Jones Timothy Gareth John
Tustin Gary John
DeStefanis Jody Lynn
Gahlings Steven
Gulakowski Randy
Kugel Timothy J.
Schlumberger Technology Corporation
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