Boring or penetrating the earth – With above-ground means to feed tool
Patent
1991-04-22
1992-12-22
Melius, Terry Lee
Boring or penetrating the earth
With above-ground means to feed tool
175423, 166 775, 279123, E21B 1910
Patent
active
051727765
ABSTRACT:
This invention relates to diamond drills drive apparatus and in particular, to an improved diamond drill chuck jaw carrier and related assembly. The apparatus comprises a hydraulically operated vane motor concentrically mounted about the axis of rotation of a drill rod string for rotating two independently driven chuck jaw carrier assemblies about the axis. Each chuck jaw carrier assembly receives the rod string within a central aperture and comprises floating chuck jaw wheel assemblies and flying wedge assemblies. The flying wedge assemblies slidably force the chuck jaw wheel assemblies into removable engagement with the drill pipe. The chuck jaw wheel assemblies further comprise hydraulically operated vane motors driving tiers of chuck jaw wheels. The chuck jaw wheels have toothed surfaces for gripping engagement of the drill pipe. Rotation of the carrier assemblies drives the drill string; independent rotation of the upper and lower carrier assemblies permits coupling or decoupling of adjoining drill rod sections. Rotation of the chuck jaw wheels moves the rod string up or down relative to the drive apparatus.
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