U.S. federal trademark · Serial No. 85432207 · Reg. No. 4146389
Petroleum engineering in the nature of the supervision of drilling operations and design of drilling operations including selection of drilling parameters, drilling fluid and drilling fluid additives, the insertion of tubular goods, namely, casing and tubing strings into wells and completion of wells; and petroleum engineering in the nature of the design and supervision of fracturing procedures by hydraulic fracturing and well casing perforating procedures by gun perforating for oil and gas wells
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