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OIL-BASED DRILLING FLUID COMPRISING A NON-POLLUTING EMULSIFYING SYSTEM WHICH CAN BE USED FOR ANY BASE OIL AND WHICH IS STABLE IN RESPECT OF GAS HYDRATES FORMATION
OIL-BASED DRILLING FLUID COMPRISING A NON-POLLUTING EMULSIFYING SYSTEM WHICH CAN BE USED FOR ANY BASE OIL AND WHICH IS STABLE IN RESPECT OF GAS HYDRATES FORMATION
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机译:包含无污染乳化系统的基于油的钻井液,可用于任何基础油,并且相对于天然气水合物形成而言是稳定的
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摘要
The invention relates to an oil-based drilling fluid which is stable regardless of the base oil used, which is not environmentally hazardous and which is suitable for offshore drilling and, in particular, deep offshore drilling. The inventive fluid comprises a non-polluting emulsifying system containing at least one ester which is associated with a nonionic surface active agent of the polymerised carboxylic acid type (dimer and/or trimer). Oil-based drilling fluids comprising one such system, owing to the production of very stable invert emulsions, can also be used in offshore drilling conditions where gas hydrates can form.
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