ANORDNING TIL AT GRIBE OM ET RØR PÅ EN BORERIG

Methods and apparatus for running tubulars into and out of a wellbore. A gripping apparatus is activated with an actuator having a primary actuator and a redundant safety feature. The redundant safety feature may include one or more redundant fluid operated pistons. The gripping apparatus may includ...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	Odell, II, Albert C, Heidecke, Karsten, Lorenz, Joerg, Giroux, Richard Lee, Pietras, Bernd-Georg, Le, Tuong Thanh, Boutwell, Jr., Doyle Frederic, THOMPSON, Gary, HAYES, Michael
Format:	Patent
Sprache:	dan
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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