Brewster N-46 · Conventional Drive · TOTCO Rig Sense · Big Spring TX
A conventional Robinson Drilling of Texas 1,100HP land rig suited for shallower work to 11,500 feet. Powered by twin John Deere 6135 engines driving a Brewster N-46 drawworks, with dual Brewster B750 duplex mud pumps, 131-foot Superior derrick with 560,000-lb hook load, and a kelly/swivel rotary system. Last documented August 2019 — verify current configuration.
| Operator | Robinson Drilling of Texas |
| Location | Big Spring, TX 79720 |
| Depth Range | 6,000' – 11,500' |
| Rig Number | 5 |
| Last Updated | August 2019 |
| Model | Brewster N-46 |
| Prime Movers | 2× John Deere 6135 550 HP @ 1,800 RPM |
| Brake | Parkersburg Rig & Reel 42" hydromatic |
| Crown Saver | Crown-O-Matic |
| Derrick | Superior 131' |
| Traveling Block | 5-sheave Sowa 200-ton |
| Drill Line | 1-1/8" |
| Static Hook Load | 560,000 lbs (10 lines) |
| Substructure | Superior 15'5", Box on Box |
| Rotary Table | ZP175 17-1/2" |
| KB Height | 16' |
| Rotary Clearance | 14'5" |
| Kelly | 5-1/4" hex |
| Swivel | SL-180 |
| Pumps | 2× Brewster B750 Duplex |
| Prime Movers | 2× CAT 379 540 HP @ 1,200 RPM |
| Pit Capacity | 800 bbl standing (2 pits) |
| Pill Pit | 100 bbl |
| Centrifugal Pump | 5"×6" |
| Trash Pump | 4"×4" |
| Annular | 11" @ 3,000 psi |
| BOP | 11" Shaffer @ 3,000 psi |
| Accumulator | Koomey 8-tank |
| Choke Manifold | Fabricated double-valve |
| Generators | 2× 400 KW |
| Gen Engines | 2× CAT 3406C 599 HP @ 1,800 RPM |
| Drill Pipe | ~376 joints 4-1/2" |
| 8" Drill Collars | 12 |
| 6" Drill Collars | 27 |
| Wireline Unit | 11,000' |
| Surface System | TOTCO Rig Sense |
| Accommodations | Toolpusher bunkhouse, 2 doghouses (12 lockers) |
| Water Tanks | 2× 500 bbl |
Contact Total Drilling Supply LLC for pricing, inspection arrangements, and availability on this rig.