Non toxic, biodegradable well fluids
Non-damaging drilling fluids
Non-damaging manganese tetroxide water-based drilling fluids
Non-damaging manganese tetroxide water-based drilling fluids
Non-fluorescing oil-based drilling fluid
Non-poluting anti-stick water-base drilling fluid modifier and m
Non-pyruvylated xanthan in oil field applications utilizing...
Non-toxic inexpensive synthetic drilling fluid
Non-toxic inexpensive synthetic drilling fluid
Non-toxic, inexpensive synthetic drilling fluid
Non-toxic, inexpensive synthetic drilling fluid
Non-toxic, inexpensive synthetic drilling fluid
Non-toxic, inexpensive synthetic drilling fluid
Nonionic alkanolamides as shale stabilizing surfactants for aque
Nontoxic, nonchloride, water-base, inhibitive fluid to stabilize
Nutrient source for marine organisms from drilling fluids...