Apparatus for gripping a tubular on a drilling rig
摘要
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 include an integrated safety system adapted to prevent damage to the tubulars while making and breaking out connections between the tubulars and the tubular string.
申请公布号
EP2284355(A2)
申请公布日期
2011.02.16
申请号
EP20100188272
申请日期
2006.12.12
申请人
WEATHERFORD/LAMB, INC.
发明人
ODELL, II, ALBERT C;GIROUX, RICHARD LEE;LE, TUONG THANH;THOMPSON, GARY;HEIDECKE, KARSTEN;LORENZ, JOERG;BOUTWELL, JR., DOYLE FREDERIC;HAYES, MICHAEL;PIETRAS, BERND-GEORG