7
Oil and gas downhole tools, namely, stablizers; drill collars; subs; hole openers; bottom-hole assembly tools; and inspection
37
Repair and maintenance of downhole tools and assemblies used in the drilling of oil and gas wells; repair and maintenance of drill string components, namely, stub welding, OD/ID buildup and hardfacing; turning, drilling, milling, boring, threading, burninshing, welding and applying hardfacing/hardbanding material to oilfield down hole tools; lease and rental of oil well drilling and production tools, namely, drill collars, stabilizers, subs, hole openers, float valves, baffle plates, sleeves, and drillpipe screens
39
Storage of oil and gas downhole tools and assemblies used in the drilling of oil and gas wells
40
Custom manufacture and machining for others of comprehensive systems and components used in oil and gas drilling
42
Industrial design services in the nature of designing comprehensive systems and components used in oil and gas drilling; engineering services; inspection, testing and performance management of components, parts and systems of bottom hole assemblies