OIL-BASED DRILLING FLUID COMPRISING A TEMPERATURE-STABLE AND NON-POLLUTING EMULSIFYING SYSTEM

摘要

The invention concerns a temperature-stable and toxicity-free drilling fluid particularly adapted to high pressure/high temperature drilling, comprising an emulsifying system, itself including at least an alkoxylated, polyalkoxylated or non-alkoxylated superamide, optionally associated with a non-ionic cosurfactant. The oil-based drilling fluids comprising such a system, by obtaining temperature-stable reverse emulsions, can be used at temperatures up to 200 °C.