Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2007-05-10
2011-12-06
Kugel, Timothy J. (Department: 1763)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S090000, C507S110000, C507S927000, C166S311000
Reexamination Certificate
active
08071511
ABSTRACT:
A method for treating a wellbore tubular or subsurface completion equipment to help remove scale is provided. In general, the method comprises the steps of: (A) determining the likelihood of the presence of carbonate scale in the wellbore tubular or subsurface completion equipment; (B) forming or providing a treatment fluid comprising: (i) water; (ii) a chelating agent capable of forming a heterocyclic ring that contains a metal ion attached to at least two nonmetal ions; and (iii) a viscosity-increasing agent; and (C) introducing the treatment fluid into the wellbore tubular or the subsurface completion equipment.
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Pauls Richard W.
Welton Thomas D.
Booth Albanesi & Schroeder LLC
Halliburton Energy Service,s Inc.
Kent Robert A.
Kugel Timothy J.
Li Aiqun
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