Integration of Circulation Valve and Gripper
Publication Date: 2004-Jun-17
The IP.com Prior Art Database
The integration of griper and circulation valve allows the utilization of the mud pressure and flow to switch the circulation valve and use a pressure differential to power the gripper. This also includes an automatic fail safe mode when switching off the mud pumps. Another possibility would be to run the gripper without the mud exit sideways but utilize a differential pressure from a pilot valve which activates a throttle valve for generating a pressure drop and powering the gripper.