Apparatus for gripping a tubular on a drilling rig

A method and apparatus for handling tubular on a drilling rig. The apparatus is adapted for gripping a tubular and may be used with a top drive. The apparatus includes a connection at one end for rotationally fixing the apparatus to the top drive and gripping members at a second end for gripping the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PIETRAS, BERND-GEORG, GIROUX, RICHARD LEE, HEIDECKE, KARSTEN, LORENZ, JOERG, HAYES, MICHAEL, BOUTWELL JR., DOYLE FREDERIC, ODELL II, ALBERT C, LE, TUONG THANH, THOMPSON, GARY
Format:	Patent
Sprache:	eng
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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Beschreibung
Zusammenfassung:	A method and apparatus for handling tubular on a drilling rig. The apparatus is adapted for gripping a tubular and may be used with a top drive. The apparatus includes a connection at one end for rotationally fixing the apparatus to the top drive and gripping members at a second end for gripping the tubular. The apparatus has a primary actuator configured to move and hold the gripping members in contact with the tubular and a backup assembly to maintain the gripping member in contact with the tubular. WO 2007/070805 PCT/US2006/061945 118 -115 ,-.120