Drilling fluids, both fresh and saline, containing additives and compositions, predominantly nonionic in nature, for the beneficiation of {TAIL ~ bentonite} in {HEAD ~ such drilling slurries} are described 
Drilling fluids , both fresh and saline , containing additives and compositions , predominantly nonionic in nature , for the beneficiation of { TAIL ~ bentonite } in { HEAD ~ such drilling slurries } are described
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH