| 摘要 |
A setting tool (10) for use in a downhole wellbore is described as having a hydraulic fluid pumping mechanism (78) for providing pressurised hydraulic fluid. A piston mechanism (116) is moveable by said pressurised hydraulic fluid acting upon a portion of the piston mechanism (116). A resetting mechanism (84) is provided which when operated releases the pressurised hydraulic fluid from acting upon said portion of the piston (116) and which results in the resetting of the setting tool (10). In addition, a method for resetting a setting tool (10) is described including the steps of: (i) running the setting tool (10) downhole; (ii) actuating the setting tool (10) and thereby deploying an apparatus (203) downhole; (iii) retrieving the setting tool (10) to surface; and (iv) bleeding off pressure to reset the setting tool (10). Furthermore, a locking mechanism (100) for a downhole tool (10) is also described, the locking mechanism (100) being adapted to resist movement of a piston mechanism (116) in at least one of first and second directions. In addition, a visual indication unit (61; 62, 63) for a downhole tool (10) is also described, the visual indication unit (61; 62, 63) being adapted to be mounted on an outer part or outer housing (50) of the downhole tool (10) and being adapted to display variable data and/or other variable information to an operator of the downhole tool (10). |
