Patent ID: 11970919
Assignee: GRANT PRIDECO, INC.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 21:
22. A method for activating a tool, the method comprising:
providing the tool, wherein the tool comprises a housing, a first piston within the housing configured such that the first piston can move axially under an action of fluid flowing through the tool, wherein the first portion comprises a follower configured to fluidically damp movement of the first piston, an indexer configured to control axial movement of the first piston between a first, second and third axial position, wherein the indexer is arranged to rotate relative to the first piston, and a second piston moveable between a closed position in which fluid flowing through the tool is restricted from communicating with an activation chamber and an open position in which fluid flowing through the tool is permitted to communicate with the activation chamber; and
moving the first piston into the third position by varying the flow of fluid through the tool, thus moving the second piston between a closed position in which fluid flowing through the tool is restricted from communicating with an activation chamber and an open position in which fluid flowing through the tool is permitted to communicate with the activation chamber.