| AC | Accumulators & Related |
| AP | Air Compressors |
| AT | Air & Hyd. Tuggers |
| BH | Block/Hook Combinations |
| BL | Blocks |
| BP | B.O.P's & Related |
| BR | Brakes |
| CE | Construction/Forklifts & Related |
| CP | Clutches & PTO |
| DC | Drill Collars |
| DP | Drill Pipe |
| DR | Drilling & Workover Rigs |
| DW | Drawworks/Compounds |
| EL | Elevator Links |
| EM | Electric Motors |
| FO | Fishing Tools |
| FT | Fuel & Water Tanks |
| GS | Generators & Generator Sets |
| HK | Hooks |
| HO | Hoses |
| HT | Handling Tools |
| HU | Hydraulic Units |
| IN | Instrumentation |
| KD | Kellys & Kelly Drivers |
| MC | Miscellaneous |
| ME | Mud Equipment |
| MP | Pumps/Drilling/Well Service/Cement |
| MS | Mast/Substructures |
| PH | Pusher Houses |
| PU | Power Units Gas & Diesel |
| RA | Racks |
| RT | Rotary Tables |
| SE | SCR Equipment & Electrical |
| SH | Steel Houses |
| SR | Spool Racks & Cable |
| SV | Sheaves |
| SW | Swivels |
| TC | Torque Converters |
| TD | Top Drives |
| TR | Transmissions & Gear Boxes |
| VA | Valves & Manifolds |
| WI | Winches |