Well drillers
Μεταλλωρύχοι και χειριστές μηχανημάτων ορυχείων
Machine Operators

Well drillers set up, run and maintain drilling rigs to sink wells, take rock samples or extract liquids and gases such as oil and natural gas. They raise and lower pipes and casings, regulate pressure in the well, seal disused wells and train the crew.
Every department, for 12 months.