42 Oil and Gas Well Services-Namely, Snubbing Services; Well Workover; Running and Pulling of Pipe Under Pressure; Bailing; Fishing; Swabbing; Internal Corrosion Detection and Sampling Surveys; Oil and Gas Well Completion Services; Consulting Services in the Field of Oil and Gas Well Equipment Selection, Use and Application Techniques; Tubing Testing Services; Tubing and Pipe Plugging Services; Safety and Blowout Prevention Services; Well Testing and Reservoir Analysis Services; Hydraulic Workover Services; Nitrogen Services; Electric Wireline Services; Gas Lift Services and Specialized Consulting Services in the Field of Well and Reservoir Operation