Thinners for invert emulsions

Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component

Reexamination Certificate

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C507S129000, C507S138000, C507S139000, C507S239000, C507S240000, C507S246000, C507S261000, C507S265000, C507S266000, C507S267000, C166S308100

Reexamination Certificate

active

07435706

ABSTRACT:
A method of reducing the viscosity of oil-based drilling fluids and well service fluids at low temperatures and a thinner compound for use in such drilling fluids and well service fluids is disclosed. The method comprises adding to said drilling fluids or well service fluids a thinner having the formula:in-line-formulae description="In-line Formulae" end="lead"?R—(C2H4O)n(C3H6O)m(C4H8O)k-Hin-line-formulae description="In-line Formulae" end="tail"?where R is a saturated or unsaturated, linear or branched alkyl radical having about 8 to about 24 carbon atoms, n is a number ranging from about 1 to about 10, m is a number ranging form about 0 to about 10, and k is a number ranging from about 0 to about 10.

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