Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2010-05-04
2010-11-23
Kugel, Timothy J. (Department: 1796)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S203000, C516S020000, C516S021000, C516S198000
Reexamination Certificate
active
07838467
ABSTRACT:
Single phase microemulsions improve the removal of filter cakes formed during drilling with oil-based muds (OBMs). The single phase microemulsion removes oil and solids from the deposited filter cake. Optionally, an acid capable of solubilizing the filter cake bridging particles may also be used with the microemulsion. In one non-limiting embodiment the acid may be a polyamino carboxylic acid. Skin damage removal from internal and external filter cake deposition can be reduced. In another optional embodiment, the single phase microemulsion may contain a filtration control additive for delaying the filter cake removal, destruction or conversion.
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Clark David E.
Jones Thomas A.
Quintero Lirio
Baker Hughes Incorporated
Kugel Timothy J.
Mossman Kumar & Tyler PC
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