Wells – Processes – Placing fluid into the formation
Reexamination Certificate
2006-09-12
2006-09-12
Bagnell, David (Department: 3672)
Wells
Processes
Placing fluid into the formation
C166S308600, C507S224000
Reexamination Certificate
active
07104327
ABSTRACT:
The present invention provides methods of fracturing high temperature subterranean zones and viscous aqueous foamed fracturing fluids therefor. A fracturing fluid of this invention comprises water, a terpolymer of 2-acrylamido-2-methylpropane-sulfonic acid, acrylamide and acrylic acid or salts thereof, a gas, a foaming agent and a viscosity breaker for effecting a controlled reduction in the viscosity of the fracturing fluid.
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Funkhouser Gary P.
Harris Phillip C.
Heath Stanley J.
Bagnell David
Botts Baker
Halliburton Engery Services, Inc.
Kent Robert A.
Smith Matthew J.
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