Dual conduit drill stem member and connection

Details Dual conduit drill stem member and connection Dual conduit drill stem member and connection

1974-12-23

1976-12-21

Shedd, Wayne L.

Pipe joints or couplings

For branched path

T-type

285351, 285381, 2853322, F16L 4700

Patent

active

039984796

ABSTRACT:
When adjacent pipes are made up by tool joints on outer tubes of dual conduit drill pipe, radially spaced pin and box on inner tubes shrink fitted in tool joints are sealed by bullet shaped seal rings around pin and in box compressed against shoulders and almost enclosed.

REFERENCES:
patent: 341713 (1886-05-01), Young
patent: 626932 (1899-06-01), Reed et al.
patent: 762777 (1904-06-01), Vernon
patent: 2850264 (1958-09-01), Grable
patent: 3208539 (1965-09-01), Henderson
patent: 3265091 (1966-08-01), De Jarnett
patent: 3471177 (1969-10-01), Garrett et al.
patent: 3552779 (1971-01-01), Henderson
patent: 3552779 (1971-01-01), Henderson
patent: 3664441 (1972-05-01), Carey

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