| Business | Phone |
| Advanced Pressure Inc 10300 W Reno Ave, Oklahoma City 73127 | (405) 324-5600 |
| Baker Engine & Pump Svc 2614 Se 40th St, Oklahoma City 73129 | (405) 677-4730 |
| Z & D Machine Inc 9700 S Sunnylane Rd # E, Oklahoma City 73160 | (405) 794-8116 |
| Tuttles Oilfield Instrument 1200 Se 34th St # 16, Oklahoma City 73129 | (405) 677-7050 |