Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate
2005-12-06
2005-12-06
Walker, Zakiya (Department: 3672)
Wells
Processes
Cementing, plugging or consolidating
C166S300000
Reexamination Certificate
active
06971448
ABSTRACT:
Methods and compositions for sealing subterranean zones having temperatures in the range of from about 80° F. to about 300° F. are provided. A method of the invention is basically comprised of the steps of providing a subterranean zone sealing composition that becomes substantially rigid when exposed to subterranean zone temperatures above about 80° F. and has a pH above about 8.5 comprised of water, a substantially fully hydrated depolymerized polymer and a cross-linking agent. The sealing composition is introduced into the subterranean zone whereby it becomes rigid and seals the zone. The sealing composition can subsequently be removed by contact with a fluid having a pH below about 8 when a boron compound is utilized as the cross-linking agent.
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Munoz, Jr. Trinidad
Slabaugh Billy F.
Todd Bradley L.
Weaver Jimmie D.
Dougherty, Jr. C. Clark
Halliburton Energy Service,s Inc.
Kent Robert A.
Walker Zakiya
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