Support activities for petroleum and natural gas extraction

This class includes: - oil and gas extraction service activities provided on a fee or contract basis: . exploration services in connection with petroleum or gas extraction, e.g. traditional prospecting methods, such as making geological observations at prospective sites . directional drilling and redrilling; "spudding in"; derrick erection in situ, repairing and dismantling; cementing oil and gas well casings; pumping of wells; plugging and abandoning wells etc. . liquefaction and regasification of natural gas for purpose of transport, done at the mine site . draining and pumping services, on a fee or contract basis . test drilling in connection with petroleum or gas extraction This class also includes: - oil and gas field fire fighting services

This class excludes: - service activities performed by operators of oil or gas fields, see 06.10, 06.20 - specialised repair of mining machinery, see 33.12 - liquefaction and regasification of natural gas for purpose of transport, done off the mine site, see 52.21 - geophysical, geologic and seismic surveying, see 71.12