Continuous circulation drilling method

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 19/16 (2006.01) E21B 21/00 (2006.01) E21B 33/068 (2006.01)

Patent

CA 2427204

A coupler and a method for continuously circulating a drilling fluid through a drill string while adding or removing tubulars has a lower fluid pressure seal adapted to engage a drill string; lower grips adapted to engage a drill string; a valve positioned above said lower grips; upper grips adapted to engage a tubular to be added to or removed from said string; and an upper fluid pressure seal adapted to engage said tubular.

L'invention porte sur un coupleur et sur un procédé permettant de faire circuler en continu un fluide de forage dans un train de tiges tout en ajoutant ou retirant un matériel tubulaire. Ce coupleur comprend un joint d'étanchéité basse pression adapté pour venir en contact avec un train de tiges ; des éléments de serrage inférieurs adaptés pour venir en contact avec un train de tiges ; une valve positionnée au-dessus des éléments de serrage inférieurs ; des éléments de serrage supérieurs adaptés pour venir en contact avec un matériel tubulaire destiné à être ajouté ou retiré du train de tiges ; et un joint d'étanchéité haute pression adapté pour venir en contact avec le matériel tubulaire.

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