INVERT DRILLING FLUIDS

There is described an invert emulsion wellbore fluid that includes: an oleaginous external phase; a non-oleaginous internal phase, wherein a ratio of the oleaginous external phase and non-oleaginous internal phase is less than 50:50 by volume; an emulsifier; and a rheological additive comprising a s...

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Bibliographische Detailangaben
Hauptverfasser:	TOMISSON, STUART, CHAPMAN, JOHN WILLIAM, HODDER, MICHAEL HAYWARD
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES CHEMISTRY DYES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES
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Beschreibung
Zusammenfassung:	There is described an invert emulsion wellbore fluid that includes: an oleaginous external phase; a non-oleaginous internal phase, wherein a ratio of the oleaginous external phase and non-oleaginous internal phase is less than 50:50 by volume; an emulsifier; and a rheological additive comprising a sulphonated polymer formed from 100 to 10,000 monomers. There is also described a method of drilling a subterranean hole using the invert emulsion drilling fluid. L'invention concerne un fluide de forage à émulsion inverse comprenant : une phase externe oléagineuse; une phase interne non oléagineuse, un rapport de la phase externe oléagineuse et de la phase interne oléagineuse étant inférieur à 50:50 par volume, un émulsifiant et un additif rhéologique comprenant un polymère sulfoné obtenu à partir de 100 à 10 000 monomères. L'invention concerne également un procédé de forage d'un trou souterrain utilisant le fluide de forage à émulsion inverse.