Ball drop head with rotating rings

Details Ball drop head with rotating rings Ball drop head with rotating rings

E - Fixed Constructions

21

B

E21B 33/13 (2006.01) E21B 33/068 (2006.01)

Patent

CA 2218195

A ball drop head for dropping balls into a tubing or casing string of a well. The ball drop head has a central container with at least one ball carrier ring rotatably disposed therein. A ball cavity is defined in the ring, and a ball is disposed therein. The ball is biased radially inwardly toward the container so that when the ring is rotated to align the cavity with a ball release opening defined in the container, the ball is pushed through the ball release opening to enter and fall through a central opening in the container. The ring may be rotated manually or remotely, such as by inflating a pneumatic or hydraulic bellows. Additional rings may be mounted on the container to use in dropping additional balls. A method of dropping balls into a well is also disclosed.

Cette invention concerne une tête de puits adaptée pour laisser tomber des boules dans une colonne de production. L'objet de l'invention comporte un contenant centré dans lequel est prévu au moins un anneau porte-boule tournant. L'anneau délimite un logement où placer la boule qui est poussée vers le centre du contenant dans le plan radial de sorte que, après rotation de l'anneau pour aligner le logement de boule sur l'ouverture de largage prévue dans le contenant, elle puisse s'engager dans ladite ouverture et tomber dans la colonne de production. La manoeuvre de l'anneau peut se faire à la main ou à distance, au moyen par exemple d'un soufflet pneumatique ou hydraulique. Le contenant susmentionné peut comporter des anneaux additionnels pour le largage de plusieurs boules. L'invention concerne également une méthode de largage de boules dans un puits.

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