| Business | Phone |
| Energetics Inc Evansville 47715 | (812) 473-9406 |
| Gallagher Drilling Inc 115 Se 3rd St, Evansville 47708 | (812) 425-8256 |
| General Oil Corp Evansville 47720 | (812) 963-0962 |
| Harris Oil Co 20 Nw 1st St # 208, Evansville 47708 | (812) 425-9411 |
| Hertiage Petroleum 516 N 7th Ave, Evansville 47710 | (812) 425-5267 |
| Imperial Petroleum Inc 11600 German Pines Dr, Evansville 47725 | (812) 867-1433 |
| United Resources Corp 1410 N Cullen Ave, Evansville 47715 | (812) 476-7556 |
| Universal Operating Inc 1521 S Green River Rd, Evansville 47715 | (812) 477-1584 |
| Sater Enterprises 5401 Vogel Rd # 430, Evansville 47715 | (812) 477-1529 |
| Robinson Engineering 1410 N Cullen Ave, Evansville 47715 | (812) 477-1575 |
| Ryan Oil Co 123 Nw 4th St # 218, Evansville 47708 | (812) 422-4168 |
| Moore Engineering & Production 2104 Lincoln Ave, Evansville 47714 | (812) 479-1051 |