| 21311 |
Operating oil and gas field properties on a contract or fee basis--are classified in Subsector 211, Oil and Gas Extraction, based on the primary activity |
| 21311 |
Oil and gas pipeline and related structures construction and repair--are classified in Industry 23712, Oil and Gas Pipeline and Related Structures Construction |
| 21311 |
Inspecting pipelines (i.e., visual)--are classified in Industry 54199, All Other Professional, Scientific, and Technical Services |
| 21311 |
Site preparation and related construction activities on a contract or fee basis--are classified in Industry 23891, Site Preparation Contractors |
| 21311 |
Mining machinery and equipment repair and maintenance--are classified in Industry 81131, Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance |
| 21311 |
Providing transportation activities on a contract or fee basis--are classified in Sector 48-49, Transportation and Warehousing, based on the primary activity |
| 21311 |
Providing landman services on a contract or fee basis--are classified in Industry 53139, Other Activities Related to Real Estate. |
| 213111 |
Performing exploration (except geophysical surveying and mapping) services for oil and gas on a contract or fee basis--are classified in U.S. Industry 213112, Support Activities for Oil and Gas Operations |
| 213111 |
Performing geophysical surveying and mapping services for oil and gas on a contract or fee basis--are classified in Industry 541360, Geophysical Surveying and Mapping Services. |
| 213112 |
Contract drilling for oil and gas--are classified in U.S. Industry 213111, Drilling Oil and Gas Wells |