E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/04 (2006.01) C09K 8/32 (2006.01) C09K 8/56 (2006.01) E21B 21/00 (2006.01)
Patent
CA 2736728
A method for reducing the toxicity of an invert emulsion wellbore fluid is disclosed. The method comprises forming an invert emulsion wellbore fluid comprising an oleaginous continuous phase, an aqueous discontinuous phase, and an emulsifying fluid, wherein the emulsifying fluid comprises a nitrogen-containing emulsifying agent and an alkalinity agent, and wherein the invert emulsion wellbore fluid produces an LC50(SSP) of at least 30.000 parts per million at 3000°F.
La présente invention concerne un procédé pour réduire la toxicité dun fluide de puits de forage démulsion inverse. Le procédé comprend la formation dun fluide de puits de forage démulsion inverse comprenant une phase continue oléagineuse, une phase discontinue aqueuse, et un fluide émulsifiant, le fluide émulsifiant comprenant un agent émulsifiant contenant de lazote et un agent dalcalinité, et le fluide de puits de forage démulsion inverse produisant une CL50 (SSP) dau moins 30 000 parties par million à 3000 °F.
Irving Maribella
Patel Arvind D.
Finlayson & Singlehurst
M-I L.l.c.
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