Oil-well pumping machines; Oil field equipment, namely, drilling rig mechanization machines and devices

'devic':15 'drill':10 'equip':8 'field':7 'machin':5,13 'mechan':12 'name':9 'oil':2,6 'oil-wel':1 'pump':4 'rig':11 'well':3

Recorded computer operating programs; Recorded computer operating software

'comput':2,6 'oper':3,7 'program':4 'record':1,5 'softwar':8

Chemical additives for oil well drilling fluids; Emulsifiers for industrial purposes

'addit':2 'chemic':1 'drill':6 'emulsifi':8 'fluid':7 'industri':10 'oil':4 'purpos':11 'well':5

STARTWELL

Owners