Downhole Tool With Counting Mechanism

摘要

An object counting mechanism for a downhole tool which includes a tool housing having a central passage and a seat configured to selectively catch an object passing through the central passage. An activating mechanism is configured to move the seat from a first state allowing the object to pass through the seat into a second state for catching the object on the seat. A rotating sleeve causes the activating mechanism to move the seat into the second state after a given degree of rotation of the rotating sleeve. At least one contact surface is spaced apart from the seat and positioned to engage the object passing through the central passage, thereby effecting a limited rotation of the rotating sleeve at each passage of an object.

主权项

1. A sleeve valve comprising:
a. a tubular valve housing having flow ports and a central passage; b. a closing sleeve assembly operatively attached to a catch seat assembly; c. a rotating sleeve acting to initially maintain the catch seat assembly in a pass-through position and releasing the catch seat assembly into a catch position after a given degree of rotation of the rotating sleeve; and d. a rocker arm spaced apart from the catch seat assembly, the rocker arm positioned to engage an object passing through the central passage and causing a limited rotation of the rotating sleeve.