| Company | Category | Area | Address | Web | E-mail | Contact person |
| OILWELL MATERIALS & HARDWARE | Hardware-Retail | California | 506 STATE HIGHWAY 12, RIO VISTA, Solano, California, 94571-1438, USA |
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Julie Mc Cormack |
| OILWELL OPERATORS INC | Oil/gas Field Services | California | 5500 KRISTA ST, BAKERSFIELD, Kern, California, 93313-3121, USA |
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Thomas Mc Neil |
| OILWELL RESEARCH INC | Coml Physical Resch | California | 1917 N ST, BAKERSFIELD, Kern, California, 93301-4722, USA |
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| OILWELL RESEARCH INC | Environmental & Ecological Ser | California | 1917 N ST, BAKERSFIELD, Kern, California, 93301-4722, USA |
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| OILWELL SERVICES | Natural Gas Drilling | California | PO BOX 8543, WOODLAND, Yolo, California, 95776-8543, USA |
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Mike Castle |
| OILWELL TUBULAR CONSULANTS | oil and gas consultants | Texas | PO BOX 1267, CROSBY, Harris, Texas, 77532-1267, USA |
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Wilton Schexnayder |
| OILWELLCOM | oil/gas field services | Texas | 10901 DEBRA RD, HOUSTON, Harris, Texas, 77013-3313, USA |
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Bud Prestwood |
