| 09100 | Derrick erection in situ, repairing and dismantling |
| 09100 | Directional drilling services |
| 09100 | Diving services incidental to oil and gas exploration |
| 09100 | Downhole-fishing services |
| 09100 | Downhole-milling services |
| 09100 | Draining and pumping services incidental to oil and gas extraction, on a fee or contract basis |
| 09100 | Drilling contractor for offshore oil or gas well |
| 09100 | Drilling services to oil and gas extraction wells |
| 09100 | Floating drilling rig operation for petroleum or natural gas exploration or production |
| 09100 | Fluid-displacement services |
| 09100 | Fracture/stimulation services |
| 09100 | Gas extraction service activities |
| 09100 | Gravel packing services |
| 09100 | Horizontal drilling services |
| 09100 | Hot-tap operation services |
| 09100 | Hyperbaric welding services |
| 09100 | Liquefaction and regasification of natural gas for transport |
| 09100 | Mud logging services |
| 09100 | Oil and gas exploration in connection with oil and gas extraction, including traditional prospecting |
| 09100 | Oil and gas extraction service activities provided on a fee or contract basis |
| 09100 | Oil and gas field fire fighting services |
| 09100 | Oil and gas well casing, cementing, tubing and lining services |
| 09100 | Oil and gas well cementing services |
| 09100 | Oil and gas well coiled-tubing wellwork |
| 09100 | Oil and gas well conductor driving services |
| 09100 | Oil and gas well cutting, casing and abandonment services |
| 09100 | Oil and gas well pipe refurbishment services |
| 09100 | Oil and gas well sleeving repair services |
| 09100 | Oil extraction service activities |
| 09100 | Petroleum and natural gas mining support activities |
| 09100 | Petroleum test well drilling |
| 09100 | Petroleum well drilling |
| 09100 | Plugging and abandoning oil and gas wells |
| 09100 | Pumping of oil and gas wells |
| 09100 | Redrilling oil and gas wells |
| 09100 | Repair and dismantling services of derricks |
| 09100 | Sealing of oil and gas wells |
| 09100 | Separation terminal operation (natural gas) |
| 09100 | Spudding in for oil wells |
| 09100 | Test boring incidental to oil and gas extraction |
| 09100 | Turbine drilling services |
| 09100 | Well logging |
| 09100 | Well-perforating services |
| 09100 | |