Invert emulsions for well-drilling comprising a...

Details Invert emulsions for well-drilling comprising a... Invert emulsions for well-drilling comprising a...

C - Chemistry, Metallurgy

09

K

117/205, 31/21

C09K 8/36 (2006.01) B01F 17/54 (2006.01) C08L 83/12 (2006.01)

Patent

CA 1177634

INVERT EMULSIONS FOR WELL-DRILLING COMPRISING A POLYDIORGANOSILOXANE AND METHOD THEREFOR ABSTRACT OF THE DISCLOSURE The preparation of emulsions of light and heavy brines in a liquid hydrocarbon is described, using a polydiorganosiloxane bearing at least one polyoxyalkylene radical and at least one monovalent hydrocarbon radical having from 6 to 18 carbon atoms. The emulsions are useful in the well-drilling art as drilling fluids, completion fluids, packer fluids, spacer fluids and workover fluids because of their thermal stability and because they can be formulated to have a relatively high density, with or without added weighting agents.

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