Variable-length axial linkage for tubular running tools
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United States of America Patent
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-
Jan 24, 2023
Grant Date -
Oct 6, 2022
app pub date -
Oct 26, 2021
filing date -
Oct 26, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
An axial linkage acting between the main body and the gripping assembly of a tool for gripping tubular workpieces includes a drive cam body that coaxially engages an intermediate cam body via a drive thread, with the intermediate cam body coaxially engaging a driven cam body via a driven thread, and with the drive thread and the driven thread having opposite orientations. The linkage includes a latch mechanism for preventing relative axial displacement of the drive cam body and the driven cam body. In operation while unlatched, the linkage converts bi-directional relative rotation into relative axial movement of the drive cam body and the driven cam body, thus increasing or decreasing the overall length of the linkage according to the rotational direction. The linkage can be re-latched using any of multiple operational sequences.
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