Boring or penetrating the earth – Processes – Boring horizontal bores
Patent
1995-02-27
1998-09-01
Tsay, Frank
Boring or penetrating the earth
Processes
Boring horizontal bores
175376, E21B 1000
Patent
active
057997403
ABSTRACT:
A directional boring machine equipped with a boring head comprising a blade assembly. The blade assembly may comprise a plurality of blades with deflecting surfaces. Alternately, the blade assembly has a single, stepped or serrated blade. The serrated blade assembly has a planar blade which is tapered in thickness and width from its base to its forward end. The forward end has teeth cut away on the backside to provide a recess or relief space for cuttings during the drilling process. A relief space or slot also is provided between the front two teeth for the same purpose. The blade is divided into two halves, and the halves are offset so that each of the teeth on each half provides a separate cutting point. The blade is angled in an upward direction relative to the base of the blade assembly to improve penetration and cutting actions. The blade assembly in combination with the boring head body provides exceptional cutting performance in a variety of soils and rock.
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Deken Arthur D.
Sewell Cody L.
Stephenson Brent G.
The Charles Machine Works, Inc.
Tsay Frank
LandOfFree
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