Vibration damper systems for drilling with casing

Details Vibration damper systems for drilling with casing Vibration damper systems for drilling with casing

E - Fixed Constructions

21

B

E21B 17/10 (2006.01) B21D 22/12 (2006.01) B21D 53/00 (2006.01) E21B 7/20 (2006.01)

Patent

CA 2486279

Apparatus and methods are provided for reducing drilling vibration during drilling with casing. In one embodiment, an apparatus for reducing vibration of a rotating casing includes a tubular body disposed concentrically around the casing, wherein tubular body is movable relative to the casing. Preferably, a portion of the tubular body comprises a friction reducing material. In operation, the tubular body comes into contact with the existing casing or the wellbore instead of the rotating casing. Because the tubular body is freely movable relative to the rotating casing, the rotating casing may continuously rotate even though the tubular body is frictionally in contact with the existing casing.

Dispositif et méthodes permettant de réduire les vibrations pendant les opérations de forage avec tubage. Dans une de ses réalisations, un dispositif de réduction de la vibration d'un tubage rotatif comprend un corps tubulaire disposé de façon concentrique autour du tubage et mobile par rapport à ce dernier. Il est préférable qu'une portion du corps tubulaire soit composée d'un matériau qui réduit la friction. Pendant le fonctionnement, le corps tubulaire entre en contact avec le tubage existant du puits de forage plutôt qu'avec le tubage rotatif. Le corps tubulaire pouvant se déplacer librement par rapport au tubage rotatif, ce dernier peut tourner de façon continue, même si le corps tubulaire est en contact avec le tubage existant.

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