Downhole ball dropping apparatus

Details Downhole ball dropping apparatus Downhole ball dropping apparatus

E - Fixed Constructions

21

B

E21B 34/06 (2006.01) E21B 21/10 (2006.01) E21B 34/08 (2006.01) E21B 34/14 (2006.01)

Patent

CA 2498694

A ball release mechanism is mounted near the intended seat. The ball or balls are kept out of the circulating stream. High circulation rates followed by curtailment of circulation places an outlet port in position to allow the ball or balls to be pushed out by a spring. The spring or one of the balls prevents the return of an ejected ball back into the protected pocket. The ball is delivered to the seat without circulation.

Un mécanisme de libération de balle est monté à proximité du siège concerné. La balle, ou les balles, sont maintenues en dehors du flux de circulation. Des taux élevés de circulation suivis d'un raccourcissement de circulation placent un orifice de sortie dans une position permettant à la balle, ou aux balles, d'être chassées par un ressort. Le ressort, ou l'une des balles, empêche le retour d'une balle chassée dans la poche protégée. La balle arrive au siège hors circulation.

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