Hydraulic bi-directional rotary isolation valve

Details Hydraulic bi-directional rotary isolation valve Hydraulic bi-directional rotary isolation valve

E - Fixed Constructions

21

B

E21B 34/10 (2006.01)

Patent

CA 2718625

A valve (156) having a sealing surface that is rotated 90 degrees on trunnions (62) that move along a track is provided. A sleeve (42) that moves into position to protect the valve mechanism (56) when the valve is in an open position is provided. A second (74) sleeve locks the sealing element of the valve in place in the closed position. The valve may be used during drilling of wells to prevent flow in casing when the drill pipe and bit are raised above the valve.

L'invention porte sur une vanne (156) ayant une surface d'étanchéité qui est amenée à tourner de 90 degrés sur des tourillons (62) qui se déplacent le long d'une piste. Un manchon (42) qui se déplace en position pour protéger le mécanisme de vanne (56) lorsque la vanne est en position ouverte est prévu. Un second manchon (74) verrouille l'élément d'étanchéité de la vanne en place dans la position fermée. La vanne peut être utilisée durant le forage de puits pour empêcher un écoulement dans un tubage lorsque la tige de forage et le trépan sont élevés au-dessus de la vanne.

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