Drill string valve assembly

Details Drill string valve assembly Drill string valve assembly

2005-04-20

2008-03-25

Bagnell, David (Department: 3676)

Boring or penetrating the earth

With above-ground means for handling drilling fluid or cutting

With valve

C175S325100, C175S325500

Reexamination Certificate

active

07347286

ABSTRACT:
A drill string valve assembly includes a tubular valve body, including an outer surface and an inner bore for housing a valve mechanism to control fluid flow through the bore; and an axial load support releasably securable to the outer surface of the valve body, the axial load support including an upper releasable load bearing connection to the tubular body and a lower releasable load bearing connection to the tubular valve body.

REFERENCES:
patent: 4479547 (1984-10-01), Boyadjieff et al.
patent: 4625755 (1986-12-01), Reddoch
patent: 4781359 (1988-11-01), Matus
patent: 5165493 (1992-11-01), Baugh
patent: 5479988 (1996-01-01), Appleton
patent: 6637526 (2003-10-01), Juhasz et al.
patent: 7163064 (2007-01-01), Moncus et al.
patent: 2001/0045285 (2001-11-01), Russell
patent: 2002/0129934 (2002-09-01), Mullins et al.
patent: 2006/0060360 (2006-03-01), Moncus et al.
patent: 2007/0039758 (2007-02-01), Klipstein

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