22/09/17 18:48 MOEX (RUR): 67.45 change in % 0.12 LSE (USD): 4.66 change in % -0.03

Glossary

Derrick

Structure installed over a wellbore for lowering and lifting drilling tools, bottom-hole motors, and casings. May be up to 60 m high. Frustum-shaped (tower-like) or A-shaped.


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