Method and apparatus for dropping a pump down plug or ball

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/068 (2006.01) E21B 34/14 (2006.01)

Patent

CA 2686270

An improved method and apparatus for dropping a ball, plug or dart during oil and gas well operations (e.g., cementing operations) employs a specially configured valving member with curved and flat portions that alternatively direct fluid flow through a bore or opening in the valving member via an inner channel or around the periphery of the valving member in an outer channel. In one embodiment, the ball(s), dart(s) or plug(s) are contained in a sliding sleeve that shifts position responsive to valve rotation.

L'invention concerne un procédé amélioré et un appareil pour déposer une bille, un bouchon ou une pince pendant des opérations de puits de pétrole et de gaz (par exemple, opérations de cimentation) qui emploie un élément de soupape spécialement configuré avec des parties courbées et plates qui dirigent en alternance l'écoulement de fluide à travers un alésage ou une ouverture dans l'élément de soupape par le biais d'un canal interne ou autour de la périphérie de l'élément de soupape dans un canal externe. Dans un mode de réalisation, la ou les billes, la ou les pinces ou le ou les bouchons sont contenus dans un manchon coulissant qui décale la position par rapport à la rotation de la soupape.

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