E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 19/06 (2006.01) E21B 19/00 (2006.01) E21B 23/03 (2006.01) E21B 29/00 (2006.01) E21B 31/12 (2006.01)
Patent
CA 2563860
A method and apparatus for removing tubulars from a wellbore is disclosed. A lifting member grips the tubular and applies a lifting force. The lifting force is then transferred to a first surface. The lifting member is monitored and when the capacity of the first surface is reached a force transfer assembly is activated. The force transfer assembly transfers the lifting load between the first surface and a second surface. The lifting member and force transfer assembly are then adjusted to maximize the amount of lifting force applied to the tubular.
La présente divulgue une méthode et un appareil pour enlever les tubes d'un puits de forage. Un élément de levage agrippe les tubes et applique une force de levage. La force de levage est alors transférée à une première surface. L'élément de levage est surveillé et lorsque la capacité de la première surface est atteinte, un ensemble de transfert de force est activé. L'ensemble de transfert de force transfère la charge de levage entre la première surface et une deuxième surface. L'élément de levage et l'ensemble de transfert de force sont ensuite ajustés afin de maximiser la force de levage appliqué aux tubes.
Hallonquist David J.
Mayer Timothy J.
Deeth Williams Wall Llp
Weatherford/lamb Inc.
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