公开(公告)号：CA2768010C

公开(公告)日：2016-09-20

申请号：CA2768010

申请日：2006-12-12

Applicant: WEATHERFORD/LAMB INC

Inventor： ODELL ALBERT C II ,  GIROUX RICHARD LEE ,  LE TUONG THANH ,  THOMPSON GARY ,  HEIDECKE KARSTEN ,  LORENZ JOERG ,  BOUTWELL DOYLE FREDERIC JR ,  HAYES MICHAEL ,  PIETRAS BERND-GEORG

IPC: E21B19/06

Abstract: 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.