| 摘要 |
A downhole apparatus comprises: a tubular body (20); an actuator member (24) mounted on the body and moveable relative thereto by application of fluid pressure force, the actuator member being moveable from a first configuration to a second configuration; a valve (54) for controlling flow of fluid from the bore of the tubular body; and a linkage (60, 72) between the actuator member (24) and the valve (54) to permit actuation of the valve when the actuation member is in the second configuration. In use, the actuator member is preferably initially used in the first configuration and, in this configuration, the member is moveable to, for example, actuate another tool. However, if the actuator member is moved to the second configuration the movement of the member may be utilised to operate the valve, which may, for example, provide for fluid communication with one or more packers. Accordingly, the invention is useful in completions: after a string has been fully tested the actuating member may be moved to the second configuration to allow setting of a packer on the string. |
