Drill string component

Details Drill string component Drill string component

1991-11-04

1993-05-11

Neuder, William P.

Boring or penetrating the earth

With tool shaft detail

138 44, E21B 1716

Patent

active

052093115

ABSTRACT:
Drill string component for top hammer drilling comprising a rod (13) surrounded by a tube packet (4,5). The rod is provided with a thickened section (14) for cooperation with a diameter reduction (15) in the tube packet which at upwards drilling is situated below the section (14). Through this flushing liquid is prevented from flowing out of the drill string when the drill string is extended.

REFERENCES:
patent: 4987961 (1991-01-01), McNeely, Jr.
patent: 5081847 (1992-01-01), Anderson, Jr.
patent: 5102095 (1992-04-01), Schmitt-Matzen et al.

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