DOWNHOLE BALL DROPPING APPARATUS

摘要

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