Dual conduit drill stem member

Details Dual conduit drill stem member Dual conduit drill stem member

1974-12-23

1977-03-15

Shedd, Wayne L.

Pipe joints or couplings

For branched path

T-type

285142, 285114, 285369, 285417, 285383, F16L 4700

Patent

active

040120619

ABSTRACT:
Dual conduit drill stem member includes pipe having two piece tube therewithin affixed to pipe at outer ends and inner ends coupled by composite elastomeric sleeve and telescopic metal coupling, adjacent members being connected by threaded tool joints on pipe ends and compression sealed telescopic joints on tube outer ends.

REFERENCES:
patent: 1501217 (1924-07-01), Heeter
patent: 2215659 (1940-09-01), Bacon
patent: 2739829 (1956-03-01), Pedlow et al.
patent: 3266821 (1966-08-01), Safford
patent: 3441294 (1969-04-01), Krieg
patent: 3516690 (1970-06-01), Krieg
patent: 3540536 (1970-11-01), Huszar
patent: 3552779 (1971-01-01), Henderson
patent: 3563576 (1971-02-01), Lee

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