Bi-steel percussive drill rod

Details Bi-steel percussive drill rod Bi-steel percussive drill rod

2011-03-08

2011-03-08

Neuder, William P (Department: 3672)

Boring or penetrating the earth

With tool shaft detail

Reexamination Certificate

active

07900719

ABSTRACT:
A drill rod includes a first end section, a mid-section, wherein the first end section and the mid-section are connected and wherein the first end section is manufactured using different steel than is used for the mid-section. Such a configuration can reduce the costs associated with forming a drill rod while maintaining the functionality of such a drill rod.

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International Search Report and Written Opinion dated Nov. 2, 2009 as issued in International Application No. PCT/US2009/041374 filed Apr. 22, 2009.
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