Wells – Processes – Cleaning or unloading well
Reexamination Certificate
2008-01-15
2008-01-15
Bates, Zakiya (Department: 3676)
Wells
Processes
Cleaning or unloading well
C166S304000, C166S305100, C507S260000, C507S261000
Reexamination Certificate
active
07318477
ABSTRACT:
The invention generally relates to a spacer system for cleaning a section of a subterranean well borehole and casing prior to cementing. The spacer system of the invention comprises a at least one alkyl ether citrate and, optionally, at least one alcohol ethoxylate.
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International Search Report for International Application No. PCT/EP2006/062028 dated Dec. 6, 2006.
IPER for International Application No. PCT/EP2006/062028 dated Jul. 25, 2007.
Akzo Nobel N.V.
Bates Zakiya
DiTrani Angela
Mancini Ralph J.
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