Earth boring – well treating – and oil field chemistry – Preventing contaminant deposits in petroleum oil conduits
Reexamination Certificate
2011-08-02
2011-08-02
Figueroa, John J (Department: 1765)
Earth boring, well treating, and oil field chemistry
Preventing contaminant deposits in petroleum oil conduits
C507S128000, C507S269000, C507S271000, C507S274000, C507S276000
Reexamination Certificate
active
07989397
ABSTRACT:
This invention relates to methods and compositions useful in treating crude sources, and more specifically, to methods and compositions useful in reducing the concentration of phosphorus in crude streams and hydrocarbon flowback fluids. In some embodiments, the present invention provides methods that include a method comprising: providing a crude stream or a hydrocarbon flowback fluid; optionally testing the crude stream or the hydrocarbon flowback fluid for total phosphorus content; optionally testing the crude stream or hydrocarbon flowback fluid for volatile phosphorus content; adding a solution comprising a trivalent metal ion to the crude stream or the hydrocarbon flowback fluid; adding a sufficient amount of a caustic solution to the crude stream or the hydrocarbon flowback fluid to raise the pH of the stream or the fluid to about 8 or more; allowing at least a plurality of precipitates to form; removing at least one precipitate; and forming a clean crude stream or a clean hydrocarbon flowback fluid.
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Figueroa John J
Halliburton Energy Service,s Inc.
Kent Robert A.
McDermott Will & Emery LLP
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