Method and apparatus for adding a tubular to drill string...

Details Method and apparatus for adding a tubular to drill string... Method and apparatus for adding a tubular to drill string...

E - Fixed Constructions

21

B

E21B 19/16 (2006.01) E21B 21/10 (2006.01) E21B 33/068 (2006.01) E21B 33/08 (2006.01) F16K 5/02 (2006.01) F16K 5/06 (2006.01)

Patent

CA 2539039

Apparatus and a method for adding and removing tubulars whilst containing the pressure within a drill string and/or maintaining circulation of drilling fluid down a drill string using a diverter sub which is able to open up to mud flow from a side mud port and close off the flow of mud from above the drill string with or without continuous rotation of the drill string.

L'invention concerne un appareil et un procédé pour ajouter et retirer des éléments tubulaires tout en maintenant la pression à l'intérieur du train de tiges et/ou la circulation du fluide de forage vers le bas du train de tiges au moyen d'un organe de dérivation capable de s'ouvrir à un flux de boue du côté d'un orifice pour boue ou bloquer le flux de boue depuis le haut, en dessus de la colonne de forage, ou encore sans qu'il y ait une rotation en continu du train de tiges.

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