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Chemical additives for drilling muds; Drilling muds

Cutting fluids; Drilling lubricants; Lubricating oil being cutting fluids; Lubricating oils being cutting fluids

Offshore drilling platforms made primarily of metal

Attachments for well drilling machines in the nature of overshots; Centering drilling bits being parts of machines; Core drilling bits; Drill bits for rock drilling; Drilling machines; Drilling machines and parts therefor; Drilling machines for metalworking; Drilling rigs; Drilling rigs, floating or non-floating; Earth drilling machines; Geotechnical drilling machines; Milling-drilling machines; Tunnel boring machines; Waterjet cutting machines; Well drilling machines

Slurry treatment units for stabilizing and sanitizing slurry

Offshore drilling platforms made primarily of concrete

Vertical wind tunnels for sporting and recreational purposes

Operation of tunnels and underground structures for others

Construction and construction management of tunnels and underground structures; Construction of tunnels; Directional drilling of wells; Drilling of gas wells; Drilling of wells; Gas drilling; Gas drilling services; Horizontal directional drilling for installing underground pipelines; Metal drilling and perforation; Offshore drilling of wells; Rental of drilling platforms; Water well drilling; Well drilling

Custom manufacture of trenchless tunneling equipment; Custom manufacture of tunneling equipment

Design of seismic acquisition parameters, namely, models or plans for acquiring seismic data in connection with drilling operations; Design of tunnels and underground structures; Geological test drilling; Geotechnical drilling