Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Reexamination Certificate
2009-09-11
2011-12-13
Bomar, Shane (Department: 3676)
Boring or penetrating the earth
Bit or bit element
With fluid conduit lining or element
C175S402000, C166S242800
Reexamination Certificate
active
08074749
ABSTRACT:
Embodiments of the present invention generally relate to an earth removal member with features for facilitating drill-through. In one embodiment, an earth removal member for drilling a wellbore with casing or liner includes a tubular body and a head. The head is fastened to or formed with an end of the body, has a face and a side, is made from a high strength material, and has a port formed through the face. The earth removal member further includes a blade. The blade is formed on the head, extends from the side and along the face, and is made from the high strength material. The earth removal member further includes cutters disposed along the blade; and a nozzle adapter. The nozzle adapter has a port formed therethrough, is longitudinally and rotationally coupled to the head, and is made from a drillable material. The earth removal member further includes a nozzle disposed in the adapter port and fastened to the nozzle adapter.
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Weatherford International Ltd.—“DrillShoe III” brochure, date unknown, 4 pages.
Beattie Scott
Feasey Guy F.
Odell, II Albert C.
Twardowski Eric M.
Ugwuocha Sharp Okorie
Bomar Shane
Fuller Robert E
Patterson & Sheridan L.L.P.
Weatherford / Lamb, Inc.
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