Well drilling method and drilling fluid

Details Well drilling method and drilling fluid Well drilling method and drilling fluid

C - Chemistry, Metallurgy

09

K

C09K 8/38 (2006.01)

Patent

CA 2463466

The invention relates to a well drilling method consisting in removing the drilling cuttings using an aqueous drilling fluid such as a foam including a foaming agent which is, or includes, at least one mono-(aliphatic hydrocarbyl) phosphate ester. More specifically, the drilling fluid takes the form of a potassium and/or alkanolamine and/or alkylalkanolamine salt, said foam also comprising a foam stabiliser.

Une méthode de forage de puits comporte l'évacuation des déblais de forage au moyen d'un fluide de forage aqueux tel qu'une mousse comprenant un agent moussant constitué de ou comprenant au moins un mono-ester phosphate d'hydrocarbyle aliphatique. Le fluide de forage est plus particulièrement sous la forme d'un sel de potassium et/ou d'alcanolamine et/ou d'alkylalcanolamine, la mousse comprenant en outre un stabilisateur de mousse.

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