Drillstring anchor
A drillstring anchor 200 for reacting torque from a drillstring to a wellbore includes a channel 201 for receiving a downhole portion of a drillstring 202 so as to be rotationally engaged therewith: a gripper; an energy store; and an actuator capable of being driven from the energy store to cause th...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A drillstring anchor 200 for reacting torque from a drillstring to a wellbore includes a channel 201 for receiving a downhole portion of a drillstring 202 so as to be rotationally engaged therewith: a gripper; an energy store; and an actuator capable of being driven from the energy store to cause the gripper to adopt one of a first state in which it is urged outwardly for gripping the wellbore and a second, retracted state. Also claimed is a drillstring anchor where there are multiple segments (703, 704, 705, 706, fig7a) disposed along the drillstring anchor which can be driven outwardly independently of each other. |
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