Abstract: A plug (10) for sealing a conduit is described. The plug comprises a housing (42), a setting member (14), at least one anchor (16) and at least one seal element (18). Rotation of the setting member with respect to the housing in a setting direction sets the at least one anchor and the at least one seal element.

Abstract: A formation engaging member for use in an open hole anchor (10) is described. The formation engaging member has at least one first open hole surface engaging element (20) for penetrating a surface of an open hole, and at least one second open hole surface engaging element (22) for fractionally interacting with a surface of the open hole to form an interference engagement. A method of anchoring to a formation surface of an open hole and an anchor are also described.

Abstract: The present invention provides an apparatus (10) and method for transmitting torque to a downhole device. The apparatus (10) comprises a first part and a second part adapted for connection to the downhole device. The apparatus (10) also comprises an engagement means (100, 120). The first and second parts are connected together such that relative axial movement between the first and second parts is constrained on a helical path. The engagement means (100, 120) are arranged to rotationally connect the first and second parts to thereby transmit torque from the first part to the second part when a coupling point is reached on the helical path.