Going Green16 Oct 2020 08:41
OBM = Awful Shi&. Not env friendly at all, quiote the opposite, carcinogenic, not good if you manage to lose it from a ruptured mud line. After use needs major filtration if you want to use it again but is good for HPHT wells as it reduces torque on the drill string, is a nightmare if you lose it down hole, feks up the florescence on drill cuttings arriving in the shaker house, costs more than water/barite but assists the drill bit, the driller, and gives a nice oily, lubricated and slippery hole in which to insert your 'bit'.