C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/36 (2006.01)
Patent
CA 2432520
An invert emulsion suitable for drilling subterranean wells, in particular oil and gas wells is disclosed which has negative alkalinity and includes an oleaginous phase, and a non-oleaginous phase and an emulsifying agent which stabilizes the invert emulsion under conditions of negative alkalinity. The practice of the present invention permits the formulation of drilling fluids which are absent an alkaline reserve and are compatible with elastomers utilized in drilling equipment. Thus the invert emulsion fluids of the present invention are highly suitable for drilling oil and gas wells.
L'invention concerne une émulsion inverse convenant pour forer des puits souterrains, notamment des puits de pétrole et de gaz, qui présente une alcalinité négative et comprend une phase oléagineuse, une phase non oléagineuse et un agent émulsionnant qui stabilise l'émulsion inverse dans des conditions d'alcalinité négative. Cette invention permet de formuler des fluides de forage en l'absence de réserve alcaline, qui sont compatibles avec des élastomères s'utilisant dans l'équipement de forage. Les fluides émulsionnés inverses de l'invention conviennent particulièrement bien pour forer des puits de pétrole et de gaz.
Friedheim Jim
Patel Arvind D.
Finlayson & Singlehurst
M-I L.l.c.
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