| 摘要 |
An anchoring apparatus (110) for use in a wellbore, comprises at least one movable wall engaging member (120) for engaging a wall of a wellbore, wherein the at least one movable wall engaging member (120) is movable from a retracted position to an expanded position to engage the wall, and from the expanded position to a retracted position to disengage the wall. Provision of one or more wall engaging members (120) being movable from an expanded position to a retracted position allows the anchoring apparatus to be retrieved from the wellbore, and in particular, from an open hole. |
