| Business | Phone |
| Al's Oil Field Svc Rr 1, Williston 58801 | (701) 572-6489 |
| Amerada Hess Corp 113 4th St E, Williston 58801 | (701) 774-9000 |
| Bta Oil Producers 14020 W Front St, Williston 58801 | (701) 774-2014 |
| Camwest Ii Lp 201 26th St E # 200, Williston 58801 | (701) 572-9557 |
| Dresser Oil Tools 1301 Bison Dr, Williston 58801 | (701) 774-2250 |
| Dynatech Resource Corp 603 Main St, Williston 58801 | (701) 572-4079 |
| Geo Resources Inc 1407 W Dakota Pkwy # 1b, Williston 58801 | (701) 572-2020 |