SIERRA PETROLEUM SERVICES

Oil, gas, and injection well construction 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; oil, gas, and injection well construction 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; oil, gas, and injection well construction in the nature of well plug and abandonment operations; emergency response services in the petroleum industry, namely, relief well drilling; emergency response services in the petroleum industry, namely, well kill execution by momentum killing, dynamic killing, and bullheading

Petroleum engineering; petroleum engineering in the nature of critical well plan review, relief well design, and rig auditing; emergency response services in the petroleum industry, namely, well control modeling, well control engineering project management, well emergency relief management in the nature of well engineering oversight and testing, and well integrity monitoring; emergency response services in the petroleum industry, namely, well kill modeling and design; engineering consulting services in the field of petroleum engineering best practices; consulting services in the field of petroleum engineering, namely, artificial lift, production optimization, reservoir simulation and modeling and discrete fracture simulation and modeling; advisory services in the field of petroleum engineering, namely, strategic development of technology and associated software development