Liquid purification or separation – Processes – Separating
Reexamination Certificate
2008-03-04
2008-03-04
Drodge, Joseph (Department: 1723)
Liquid purification or separation
Processes
Separating
C166S267000, C175S066000, C175S206000, C210S787000, C210S788000, C210S800000, C210S732000, C210S733000, C210S735000
Reexamination Certificate
active
10674441
ABSTRACT:
This invention relates to a method of achieving a solid-liquid separation of an oil-based mud comprising the step of contacting said oil-based mud with a water-in-oil emulsion comprising a polymer derived from at least one water-soluble monomer, where the polymer is not dissolved prior to contact with the oil-based mud, mixing the water-in-oil emulsion and the oil-based mud and separating the solid phase from the liquid phase in the oil-based mud. In addition, this invention also relates to a composition comprising an oil-based mud with a water-in-oil emulsion comprising a polymer derived from at least one water-soluble monomer, wherein the polymer is not dissolved prior to contact with the oil-based mud.
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Adams Jorge
Farinato Raymond
Huang Sun-Yi
Masias Henry
Drodge Joseph
Kemira Oyj
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