Oil Well Drilling and Completion Equipment-Namely, (( Cement Collars, )) Circulating Sleeves, External Casing Packers, Impression Packers, Inflatable Packers, Downhole Testing and Treating Tools; (( Construction Machines-Namely, Piling Corrugators ))

Electronic Instrumentation for the Recording, Monitoring and Calculation of Oil Well Pressures and Temperatures-Namely, Drillstem Testing Units

Drill Stem Testing Services; Leasing and Operating Oil Field Drilling and Pipeline Equipment