Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2011-05-10
2011-05-10
Kugel, Timothy J. (Department: 1765)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C166S305100, C175S065000, C507S139000, C507S140000, C516S020000, C516S021000
Reexamination Certificate
active
07939470
ABSTRACT:
An invert emulsion drilling fluid, and a method for the use thereof in drilling wellbores, with good rheological properties at high temperatures and pressures. One embodiment of the drilling fluids are free of organophilic clays and lignites, free of calcium chloride, and comprise an alcohol in the internal phase, a quaternary ammonium emulsifier, and argillaceous solids. In one embodiment, the alcohol is a glycerol, a polyglycerol, or a mixture thereof. In one embodiment, the base oil for the emulsion is a paraffin and/or mineral oil. The drilling fluids provide good lubricity and high rates of penetration.
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Tony Harlan, et al., Salt-Free Internal Phase Oil Mud Provides Imported Performance, AADE-06-DF-HO-08, presented at AADE 2006 Fluids Conf. in Houston, TX Apr. 11-12, 2006, 9pp.
Maghrabi Shadaab Syed
Wagle Vikrant Bhavanishankar
Halliburton Energy Service,s Inc.
Kugel Timothy J.
Roddy Craig W.
Tripp Karen B.
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