Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2011-05-03
2011-05-03
Kugel, Timothy J. (Department: 1763)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S100000, C507S103000, C507S200000, C507S241000, C166S305100, C166S311000
Reexamination Certificate
active
07935662
ABSTRACT:
A method for removing drilling damage from a formation in a wellbore that has not been produced includes injecting a chemical-acting cleanup fluid and contacting it with a filtercake on a face of a formation of interest for a period of time sufficient to loosen some of the solids embedded in the filtercake. The method further includes circulating a solids removal fluid at a high rate through the wellbore across the face of the formation of interest, the solids removal fluid including a viscosifier, and positioning a second treatment fluid having a fluid loss control pill in the wellbore at the formation of interest. The method further includes degrading particles of the fluid loss control pill and degrading remaining bridging agent from the drilling fluid.
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U.S. Appl. No. 11/609,367 Office Action dated Oct. 25, 2010.
Gadiyar Balkrishna
Parlar Mehmet
Curington Tim
Kugel Timothy J.
Li Aiqun
Matthews David G.
Schlumberger Technology Corporation
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