| 摘要 |
Described in the use of water-insoluble ethers, with a flash point above 80 DEG C, of monohydric alcohols, of natural and/or synthetic origin, with at least 4 C-atoms, preferably at least 6 C-atoms in the alcohol residues, as the oil phase or component of the oil phase in invert drilling-oil muds which are in the form of water/oil emulsions, which include in the closed oil phase, that can flow and be pumped in the temperature range 0 to 5 DEG C, a disperse aqueous phase plus, optionally, other commonly used additives, and which are suitable for use in prospecting for, for instance, oil and natural-gas deposits without polluting the environment. Also described are other drilling-oil muds of the kind described above, characterized by the fact that they have added to them as a closed oil phase, or dissolved in environmentally compatible water-insoluble oils, substantially water-insoluble ethers of monohydric alcohols, the oil phase being capable of flowing and being pumped in the temperature range 0 to 5 DEG C and having a flash point over 80 DEG C. |
