Gas separation: processes – Liquid contacting – Hydrate inhibitor
Reexamination Certificate
2006-03-07
2006-03-07
Lawrence, Frank M. (Department: 1724)
Gas separation: processes
Liquid contacting
Hydrate inhibitor
C095S154000, C585S015000, C585S950000
Reexamination Certificate
active
07008466
ABSTRACT:
A method for inhibiting the formation of gas hydrates within a fluid comprising a gaseous hydrocarbon phase, a liquid hydrocarbon phase and an aqueous phase which method comprises mixing a polymeric emulsifier and optionally a non-ionic non-polymeric co-emulsifier with the fluid prior to subjecting the fluid to conditions under which gas hydrates can be formed so as to generate a water-in-oil emulsion comprising a discontinuous aqueous phase, a continuous liquid hydrocarbon phase and a substantially gas impermeable interfacial layer comprising said polymeric emulsifier and optionally said non-ionic non-polymeric co-emulsifier wherein the aqueous phase is distributed in the continuous liquid hydrocarbon phase in the form of droplets and the substantially gas impermeable interfacial layer encapsulates said droplets.
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Notification of Transmittal of International Preliminary Examination Report for PCT/GB02/03420, International Filing date Jul. 25, 2002; 4 pages, mailed Mar. 18, 2004.
BP Exploration Operating Company
Lawrence Frank M.
Nixon & Vanderhye
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