OLJEBASERADE EMULSIONSFLUIDER INNEHALLANDE ORGANOFILA LEROR MED OKAD DISPERGERBARHET FOR ANVENDNING VID BORRNING

摘要

An oil-base emulsion fluid comprising an oil phase, water eg in an amount of from about 2 to about 50% by volume and from 1 to 30 lbs. per barrel (2.8 to 86 g/l) of an organophilic clay gellant comprising the reaction product of a smectite- type clay having a cation exchange capacity of at least 75 milliequivalents per 100 grams and from 80 to 120 milliequivalents per 100 grams of clay of a methyl benzyl dialkyl ammonium compound, wherein the compound contains 20 to 35% alkyl groups having 16 carbon atoms and 60 to 75% alkyl groups having 18 carbon atoms.