8621 Support services to mining

**Includes:** - derrick erection, repair and dismantling services - well casing, cementing, pumping, plugging and abandoning of wells - test drilling and exploration services in connection with petroleum and gas extraction - specialized fire extinguishing services **Excludes:** - geological, geophysical and related prospecting and consulting services, cf. 83411

**Includes:** - draining and pumping of mines - overburden removal and other development and preparation services of mineral properties and sites, including tunneling, except for oil and gas extraction - test drilling services in connection with mining operations, except for oil and gas extraction **Excludes:** - mineral exploration and evaluation services, cf. 83411 - geophysical services, cf. 83412