37
Oil and gas well completion services, namely, providing electric wire line completion for others, providing perforating services for others; coiled tubing services for oil and gas wells; Nitrogen services for the oil and gas drilling and production industry, namely maintenance services involving the use of nitrogen gas to test the upkeep, reliability and functioning of the wellbore, equipment and pipes; nitrogen services for the oil and gas drilling and production industry, namely maintenance services involving the use of nitrogen gas to purge other gases from the wellbore, equipment and pipes; nitrogen services for the oil and gas drilling and production industry, namely maintenance services involving the use of nitrogen gas to test for leaks in the wellbore, equipment and pipes; nitrogen services for the oil and gas drilling and production industry, namely extraction services involving the use of nitrogen gas to bring on production of gas and oil in wells; pipe recovery, slickline wireline services; Heavy duty fishing services for the oil and gas drilling and production industry, namely maintenance services involving the recovery of assemblies and equipment from the wellbore, and the removal of wellbore obstructions; pipe testing and mechanical services for the oil and gas industry; thru-tubing remedial services for the oil and gas industry
40
Oil and gas well treatment services, namely oil well fracturing and oil well perforation
42
Supervising, inspecting and operating oil and gas well equipment for others; inspection of oil and gas field casing for others; inspection of oil and gas field tubing for others, oil and gas well services, namely snubbing services; well logging services, production logging services