7
Apparatus, instruments, tools and equipment for use in drilling oil and gas wells, namely, drilling rigs, earth drilling machines, drill bits for rock drilling, centering drilling bits being parts of machines, core drilling bits, drill bits for rock drilling, drilling machines and parts therefor, drilling rig mechanization machines and devices, drilling rig mechanical handling machines and devices and power operated drilling rigs; drilling rigs, namely, truck and track-mounted drilling rigs, portable drilling rigs, seismic drilling rigs, mineral exploration drill rigs, oil and gas drilling rigs
37
Oil well drilling and pumping; maintenance and repair services, namely, maintenance and repair of drilling equipment for oil and gas wells; oil field services provided to the oil and gas industry, namely, rental of oil and gas drilling rigs and servicing equipment for oil and gas wells, oil and gas drilling, and servicing, namely cleaning and clearing of oil and gas wells
40
Custom manufacture of customized oil and gas drilling equipment
42
Development and research of new technology and drilling processes for use in oil and gas drilling
45
Licensing of new technology and drilling processes for use in oil and gas drilling
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