Wells – Processes – Cleaning or unloading well
Reexamination Certificate
2007-05-15
2007-05-15
Bates, Zakiya W. (Department: 3676)
Wells
Processes
Cleaning or unloading well
C166S263000, C166S303000, C166S304000, C166S310000, C166S371000
Reexamination Certificate
active
10730925
ABSTRACT:
Hydrocarbon solids are removed from an oil well by feeding into the oil well a composition comprising at least 40 vol. % dense phase carbon dioxide and at least 30 vol. % of a C1–C3alkanol component and optionally one or more surfactants, under a pressure of 300 to 10,000 psia and a temperature of 90° F. to 120° F., holding the composition in the well to solubilize hydrocarbon solids, and then removing from the well a liquid composition comprising solubilized hydrocarbon solids and alkanol.
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Bates Zakiya W.
Feng Flora W.
Praxair Technology Inc.
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