This U.S. industry comprises establishments primarily engaged in drilling oil and gas wells for others on a contract or fee basis. This industry includes contractors that specialize in spudding in, drilling in, redrilling, and directional drilling. Establishments primarily engaged in--

Including:

• Directional drilling of oil and gas wells on a contract basis
• Drilling directional oil and gas field wells on a contract basis
• Drilling for gas on a contract basis
• Drilling for oil on a contract basis
• Drilling gas and oil field wells on a contract basis
• Drilling oil and gas field service wells on a contract basis
• Drilling water intake wells, oil and gas field on a contract basis
• Gas well drilling on a contract basis
• Oil and gas well drilling services (redrilling, spudding, tailing) on a contract basis
• Oil well drilling on a contract basis
• Reconditioning oil and gas field wells on a contract basis
• Reworking oil and gas wells on a contract basis
• Service well drilling on a contract basis
• Spudding in oil and gas wells on a contract basis
• Tailing in oil and gas field wells on a contract basis
• Water intake well drilling, oil and gas field on a contract basis
• Well drilling (i.e., oil, gas, water intake wells) on a contract basis
• Workover of oil and gas wells on a contract basis