Classification Information
Oil extraction services; Drilling of deep oil or gas-wells; Oil and gas drilling; Construction of structures for the production of crude oil; Construction, maintenance, and construction project management services in oil and gas fields; Extraction of oil and gas; Oil and gas well downhole coring services; Oil well casing, tubing, and drill pipe installation; Oil pumping and extraction; Installation of oil well casings, tubing and drill pipes
Building Construction and Repair