| Business | Phone |
| Grey Wolf Drilling Co 750 Aero Dr, Shreveport 71107 | (318) 222-6803 |
| Langston Drilling Co 400 Travis St 1401, Shreveport 71101 | (318) 227-8777 |
| Mallard Drilling Corp 5918 Fairfield Ave, Shreveport 71106 | (318) 869-2074 |
| Accounting Services Inc 1434 Hawn Ave, Shreveport 71107 | (318) 227-8150 |