drilling fluid additives, namely, partial hydrolytic polyacrylamide, bentonite, and other chemical additives for oil well drilling and mineral exploration and production drilling

'addit':3,12 'bentonit':8 'chemic':11 'drill':1,16,22 'explor':19 'fluid':2 'hydrolyt':6 'miner':18 'name':4 'oil':14 'partial':5 'polyacrylamid':7 'product':21 'well':15

Mechanical devices and equipment, namely, dispensers of drilling fluid additives into a drilling fluid environment

'addit':10 'devic':2 'dispens':6 'drill':8,13 'environ':15 'equip':4 'fluid':9,14 'mechan':1 'name':5

Drilling machines, namely, device and equipment for dispensing drilling fluid additives into a drilling fluid environment

'addit':11 'devic':4 'dispens':8 'drill':1,9,14 'environ':16 'equip':6 'fluid':10,15 'machin':2 'name':3

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