| 摘要 |
A downhole tool including a cam housing disposed in a central bore of a sub; a cam piston having a cam track disposed in the cam housing; a rotary piston having a rotary value and an auxiliary track disposed in the cam housing; a guide pin extending through the cam housing into the cam track; and a position pin extending through a cam flange into the auxiliary track. Also, a method of actuating a downhole tool, the method including disposing the downhole tool in a wellbore, wherein the downhole tool comprises a cam piston and a rotary piston; providing a flow of fluid through a central bore of the downhole tool at a working flow rate; changing the flow of fluid through the central bore of the downhole tool to a trigger range, thereby rotating a rotary valve of the rotary piston. |
