Wells – Processes – Material placed in pores of formation to treat resident...
Reexamination Certificate
2006-08-01
2006-08-01
Bates, Zakiya W. (Department: 3676)
Wells
Processes
Material placed in pores of formation to treat resident...
C166S278000, C166S300000, C166S308500
Reexamination Certificate
active
07082995
ABSTRACT:
Methods of reducing the viscosity of a viscosified treatment fluid are provided which comprise the steps of: providing a viscosified treatment fluid that comprises water, a crosslinked gelling agent, and a delinking composition capable of delinking at least a portion of the crosslinked gelling agent wherein the delinking composition comprises a delinking agent; and allowing the crosslinked gelling agent and the delinking composition to interact so as to delink at least a portion of the crosslinked gelling agent. Also provided are methods of reusing viscosified treatment fluids, methods of fracturing subterranean formations, and methods of gravel packing subterranean formations. Also provided are delinking compositions capable of delinking at lest a portion of a crosslinked gelling agent; and a viscosified treatment fluid comprising water, a crosslinked gelling agent, and a delinking composition capable of delinking at least a portion of the crosslinked gelling agent wherein the delinking composition comprises a delinking agent.
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Foreign communication from related counterpart application dated Jul. 4, 2005.
U.S. Appl. No. 10/664,206, filed Sep. 9, 2003, Hanes et al.
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Hanes, Jr. Robert E.
Slabaugh Billy F.
Weaver Jimmie D.
Baker & Botts
Bates Zakiya W.
Halliburton Energy Service,s Inc.
Kent Robert A.
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