Invention Grant
US09551193B2 Drill pipe handling apparatus having improved pipe gripping mechanism 有权
钻管处理装置具有改进的管夹机构

Drill pipe handling apparatus having improved pipe gripping mechanism
Abstract:
In a drill pipe handling apparatus, a pipe gripping mechanism comprises three pipe-gripping jaws arranged to grip a pipe at locations adjacent the apices of a triangle containing the axis of the pipe. A first pipe gripping jaw is connectible to a first pivoted arm at any selected one of a set of plural distances from the pivot axis of the first arm and connected to the first arm at one of those plural distances, and a second jaw is connectible to the second arm at any selected one of the same set of plural distances from the pivot axis of the second arm and connected to the second arm at the same one of those plural distances at which the first jaw is connected to the first arm. Because the same first and second jaws are connectible to the arms at plural distances from the pivot axes, the same jaws can accommodate a wide range of pipe diameters.
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