National 50 Mechanical 450HP — Lee C. Moore 131' Derrick — Brewster 200-Ton Block
Robinson Drilling of Texas RD Rig 8 is a mechanical 450HP land rig with a National 50 single-drum drawworks powered by dual CAT 3406 diesels. Features a 131-ft Lee C. Moore derrick with a 4-sheave Brewster 200-ton traveling block, 1-1/8" drill line, Gardner Denver 17-1/2" rotary table, and a 300-bbl mud pit. Available through Total Drilling Supply LLC.
| Operator | Robinson Drilling of Texas (RD) |
| Rig Number | 8 |
| Type | Mechanical Land Rig |
| Model | National 50 (Mechanical) |
| Rating | 450 HP |
| Configuration | Single Drum |
| Prime Movers | 2× CAT 3406 Diesel |
| Brake | Parkersburg 42" Hydromatic |
| Crown Saver | Crown-O-Matic |
| Derrick | Lee C. Moore 131' |
| Traveling Block | 4-Sheave Brewster TB-200 Ton |
| Drill Line | 1-1/8" w/ Spooler |
| Weight Indicator | Cameron Type C |
| Substructure | Lee C. Moore 11'3" Box on Box |
| Rotary Table | Gardner Denver 17-1/2" |
| KB Height | 13' KB |
| Rotary Clearance | 9' |
| Mud Pit | 300 bbl capacity |
| Centrifugal Pumps | 2× 3"×4" |
| Kelly | 5-1/4" Hex |
| Swivel | IDECO SS250 |
| Wireline Unit | 10,000' |
| Dog House | Top Dog House |
| Lubster | 2-compartment |
Contact Total Drilling Supply LLC for pricing, inspection, and availability on this rig.