| Business | Phone |
| Badgwell & Assoc Inc 2121 San Jacinto St 1450, Dallas 75201 | (214) 754-7006 |
| Edwards Petroleum 3131 Turtle Creek Blvd 1100, Dallas 75219 | (214) 965-0220 |
| Eric Hyman & Assoc 5400 Lbj Fwy 1325, Dallas 75240 | (214) 922-0400 |
| G & B Petroleum 17774 Preston Rd, Dallas 75252 | (972) 407-8365 |
| Geo-Check 10143 Hedgeway Dr, Dallas 75229 | (214) 956-8084 |
| H J Gruy & Assoc 600 N Pearl St # 2230, Dallas 75201 | (214) 720-1909 |
| Bob Sample & Assoc 4925 Greenville Ave 945, Dallas 75206 | (214) 369-1913 |
| M A Schuepbach Intl Oil 2651 N Harwood St 570, Dallas 75201 | (214) 880-9035 |
| Calhoun Engineering Inc Petro 4625 Greenville Ave 102, Dallas 75206 | (214) 522-4925 |
| Cardinal Resources 8080 N Central Expy, Dallas 75206 | (214) 891-7050 |
| Netherland Sewell & Assocs Inc 1601 Elm St 4500, Dallas 75201 | (214) 969-5401 |
| Ogre Partners 13111 N Central Expy, Dallas 75243 | (214) 575-4088 |
| Degolyer & Mac Naughton 5001 Spring Valley Rd, Dallas 75244 | (214) 368-6391 |
| Dutton Production Svc 5646 Milton St 305, Dallas 75206 | (214) 691-3333 |
| Eetradeco Llc 4625 Greenville Ave 206, Dallas 75206 | (214) 363-2401 |
| Harlan Consulting 4625 Greenville Ave 300, Dallas 75206 | (214) 373-7700 |
| United Texas Petroleum 17774 Preston Rd, Dallas 75252 | (972) 818-8815 |
| La Roche Petroleum Consultants 4600 Greenville Ave 160, Dallas 75206 | (214) 363-3337 |
| Mcday Energy Corp 5646 Milton St 716, Dallas 75206 | (214) 369-3818 |
| Petroleum Logistics Corp 5646 Milton St, Dallas 75206 | (214) 265-7080 |
| Roebuck Associates 5646 Milton St # 602, Dallas 75206 | (214) 739-2615 |
| Scotia Group Inc 4849 Greenville Ave 1150, Dallas 75206 | (214) 987-1042 |
| H Rudy Parkison Inc 7250 Lane Park Dr, Dallas 75225 | (214) 363-0101 |
| Swindell & Assoc 4625 Greenville Ave 201, Dallas 75206 | (214) 987-0070 |
| Wellington Resources Corp 5646 Milton St, Dallas 75206 | (214) 987-9060 |
| Cornerstone Petroleum Llc 10641 Boedeker St, Dallas 75230 | (214) 368-8500 |
| Cullum Interest Inc 5952 Royal Ln, Dallas 75230 | (214) 696-5588 |
| Forrest A Garb & Assoc Inc 5310 Harvest Hill Rd 275, Dallas 75230 | (972) 788-1110 |
| Fusions Petroleum Technologies 3807 N Collins Blvd, Dallas 75207 | (214) 393-0448 |
| B & W Southern Petroleum 4131 N Central Expy 850, Dallas 75204 | (214) 522-9200 |
| Premier Marketing Vending Svc 10219 Plano Rd, Dallas 75238 | (214) 348-0107 |
| Additive Systems Inc 3900 Singleton Blvd, Dallas 75212 | (214) 630-0358 |
| William Cobb & Assoc Inc 12770 Coit Rd 907, Dallas 75251 | (972) 385-0354 |
| Patton Consulting Inc 2436 Monaco Ln, Dallas 75233 | (214) 330-7084 |
| Philip Crouse & Assoc 10124 Solta Dr, Dallas 75218 | (214) 841-0044 |
| Produce Consulting Dallas 75252 | (972) 769-7658 |