Device and procedure for the insertion of a new drilling...

Details Device and procedure for the insertion of a new drilling... Device and procedure for the insertion of a new drilling...

2006-06-09

2010-12-07

Neuder, William P (Department: 3672)

Boring or penetrating the earth

With means movable relative to tool or shaft to control...

C175S318000

Reexamination Certificate

active

07845433

ABSTRACT:
A device and the relative are described, for the insertion of a new drilling string-element into a drilling-string essentially including a short pipe-shaped body (C) having, at opposite ends thereof, a device suitable for screwing the body onto drill pipes, in which two valves are housed, of which one valve (A) is radial to said short body, interceptable from the outside by means an adaptor and equipped with a suitable safety plug, the other valve (B) being axial with respect to the body.

REFERENCES:
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patent: 2158356 (1939-05-01), Dyer
patent: 3298385 (1967-01-01), Jackson et al.
patent: 4310050 (1982-01-01), Bourgoyne, Jr.
patent: 4448267 (1984-05-01), Crawford, III et al.
patent: 6253861 (2001-07-01), Carmichael et al.
patent: 2004/0154835 (2004-08-01), Allen et al.

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