| 摘要 |
<p>An improved wireline borehole shifting tool comprises upwardly extending upper dog means and downwardly extending lower dog means, with the upper dog means being extendable and retractable responsive to slack or tension, respectively, in the wireline; with the lower dog means being extendable and retractible and longitudinally movable relative to the upper dog means responsive to movement of a reciprocator shaft and power means that is disposed within the tool body beneath the lower dog means and with the lower dog means being at all times movable radially inwardly against a spring bias force. Also disclosed is an arrangement utilizing the shifting tool for running a caliper log of the borehole conduit diameter profile for a selected region, with the shifting tool lower dog means acting as the caliper sensing means. Further disclosed are unique methods for utilizing the shifting tool to perform shifting operations on devices that are disposed in wellbore conduits. Additionally disclosed are unique methods utilizing the shifting tool to initiate shifting movement in such devices.</p> |
