Wells – Processes – Graveling or filter forming
Reexamination Certificate
2007-01-30
2007-01-30
Suchfield, George (Department: 3676)
Wells
Processes
Graveling or filter forming
C166S280200, C166S300000, C166S308100, C166S308500, C507S260000, C507S267000, C507S269000, C507S277000, C507S906000, C507S921000, C507S924000
Reexamination Certificate
active
10785300
ABSTRACT:
In one embodiment, the present invention provides a method of reducing the viscosity of a viscosified treatment fluid comprising contacting the viscosified treatment fluid with an acid generated from an orthoester composition that comprises an orthoester. In another embodiment, the present invention provides a method of reducing the pH of a viscosified treatment fluid comprising providing an orthoester composition that comprises an orthoester; contacting the viscosified treatment fluid with the orthoester composition; allowing the orthoester to generate a generated acid; and allowing the generated acid to at least partially reduce the pH of the viscosified treatment fluid. Embodiments of fracturing and gravel packing methods also are disclosed.
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Frost Keith A.
Funkhouser Gary P.
Todd Brad L.
Baker & Botts
Halliburton Energy Service,s Inc.
Kent Robert A.
Suchfield George
LandOfFree
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