Methods and apparatus for severing nested strings of tubulars

Details Methods and apparatus for severing nested strings of tubulars Methods and apparatus for severing nested strings of tubulars

E - Fixed Constructions

21

B

E21B 29/00 (2006.01) E21B 29/12 (2006.01)

Patent

CA 2433362

The present invention provides an apparatus and method for severing casing as it is pulled from a wellbore. An apparatus (100) is provided, comprising a clamping assembly (130), a drilling assembly (150) and a cutting assembly (120). In one aspect, the apparatus is disposed at the end of a telescopic arm (110), with the components being remotely operated by personnel using a control panel (125). The apparatus can be positioned adjacent casing (200') and clamped thereto. Thereafter, the apparatus can drill a hole completely through the casing for the insertion of a retention pin. The apparatus can then severe the casing into manageable lengths to facilitate disposal, such as during a plugging and abandonment procedure.

La présente invention concerne un procédé et un dispositif de séparation de tubage pendant son retrait d'un puits de forage. On dispose à cet effet d'un appareil (100) comprenant un ensemble de serrage (130), un ensemble perforant (150), et un ensemble coupant (120). Pour l'un des aspects, l'appareil est disposé à l'extrémité d'un bras télescopique, ses éléments étant télécommandés par le personnel depuis un panneau de commande (125). L'appareil peut être positionné contre le tubage (200') et s'y serrer. Dès lors, l'appareil peut percer un trou traversant complètement le tubage en vue de l'insertion d'une clavette de retenue. L'appareil peut séparer le tubage en longueurs manipulables de façon à faciliter l'enlèvement, notamment pendant une procédure de colmatage et d'abandon.

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