Patent ID: 8846583
Filing Date: 2014-09-30
Classification: C09K,C10M,C10N

Abstract:
1. A drilling fluid comprising, as an oil phase, a lubricant composition having an aerobic biodegradability rate of more than 20% measured according to OECD 306, said lubricant composition being based on a hydrocarbon mineral oil and on tall oil fatty acid(s), the lubricant composition comprising: between 99.95 and 90% by weight of a hydrocarbon oil having: a boiling temperature in the range from 220 to 350° C.; an aromatic content measured according to IP 391 of less than or equal to 1% by mass; a kinematic viscosity at 40° C. according to NF T 60100 method comprised between 1.8 and 4 mm between 40 ppm and 10% by weight of a composition comprising from 80 to 100% by weight of tall oil fatty acid(s).