- Western Oil Well Supply Inc
- Western Oil Well Svc Co
- Western Oilwell Svc Co
- Western Well Svc
- Western Well Svc
- Westex Well Svc Inc
- Wexpro Co
- Wiggins Oil Tool Co
- William S Miller Disposal Well
- Winchester Well Svc
- Wonder Well Svc Inc
- Wood Group Logging Svc
- Xtreme Well Svc Inc
- Yellow Rose Express
- Yetter Well Svc
- Yetter Well Svc
- Young Well Svc
- Zane Petroleum Inc
