E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 19/16 (2006.01) E21B 33/16 (2006.01)
Patent
CA 2633182
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 backup 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. The apparatus may be part of a top drive and comprise a swiver, a cementing plug launcher and/or a sensor.
La présente invention concerne un dispositif et des procédés destinés à conduire des tubulaires dans un puits de forage et hors de celui-ci. Un dispositif de préhension est activé avec un actionneur comprenant un mécanisme principal et un mécanisme de secours redondant. Le mécanisme de secours redondant peut comporter un ou plusieurs pistons redondants à commande hydraulique. Le dispositif de préhension peut intégrer un système de sécurité conçu pour éviter d'endommager les tubulaires lors de leur raccord au train de tubulaires ou de leur séparation de celui-ci.
Boutwell Doyle Frederic Jr.
Giroux Richard Lee
Hayes Michael
Heidecke Karsten
Le Tuong Thanh
Deeth Williams Wall Llp
Weatherford/lamb Inc.
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