Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2006-01-10
2006-01-10
Boyer, Charles (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S207000, C510S213000, C510S225000, C510S245000, C510S253000, C510S271000, C510S272000, C510S435000, C134S038000, C134S039000, C134S040000
Reexamination Certificate
active
06984614
ABSTRACT:
A composition for removing paraffin, wax, or asphaltine deposits from the surface of a crude oil transmission system, such as a downhole tubular, a pipeline, or a surface tank, includes an aqueous sodium hydroxide solution containing from 18% to 25% by weight sodium hydroxide. The composition further includes an acetic acid solution containing from 30% to 55% by weight acetic acid compared to the sodium hydroxide, and a liquid aromatic hydrocarbon having from 6 to 10 carbon atoms and from 15% to 40% by weight compared to the sodium hydroxide. According to the method of the invention, the aqueous sodium hydroxide solution may be metered in a downhole tubular or a pipeline separate from the acetic acid solution, such that heat generated by the mixed composition is generated within the downhole tubular or the pipeline.
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Boyer Charles
Browning & Bushman P.C.
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