System to control the vertical movement of a drillstring

Details System to control the vertical movement of a drillstring System to control the vertical movement of a drillstring

E - Fixed Constructions

21

B

255/24

E21B 7/00 (2006.01) E21B 19/08 (2006.01)

Patent

CA 1217758

ABSTRACT A system for controlling the movement of a drillstring and which is removably interconnected with a drill rig. The system includes at least one fluidic cyl- inder and piston assembly removably connected at an upper end to a support, such as the rig's traveling block assembly, and at a lower end to the drillstring. A pump is operatively connected to the cylinder and piston assembly and a control valve device is provided to control the flow of the fluid to the cylinder and piston assembly. A computing device is in operative communication with a data measurement system and the control valve device and controls the movement of the drillstring in response to data, such as weight-on-bit, received from the data measurement system.

466010

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