Drill pipe

Details Drill pipe Drill pipe

1989-08-24

1990-08-21

Novosad, Stephen J.

Boring or penetrating the earth

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

166 651, 175215, 175323, 2851331, E21B 1702, E21B 1718, E21B 1722

Patent

active

049497979

ABSTRACT:
An improved drill pipe assembly wherein each pipe section is formed as a concentric walled pipe having both an axial and an annular space therethrough, and the pipe section includes means for communicating the adjoining annular spaces through the series of respective box end/pin end joints whereby equipment compartmentation, conductor traverse, ballast containment, gas pressurization and weight addition can be effectively utilized in controlled manner.

REFERENCES:
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patent: 3065807 (1962-11-01), Wells
patent: 3265091 (1966-08-01), De Jarnett
patent: 3489438 (1970-01-01), McClure
patent: 3638970 (1972-02-01), Sandquist et al.
patent: 3897097 (1975-04-01), Oertle
patent: 3928903 (1975-12-01), Richardson et al.
patent: 4067596 (1978-01-01), Kellner et al.
patent: 4280535 (1981-07-01), Willis
patent: 4423778 (1984-01-01), Goldsmith
patent: 4683944 (1987-08-01), Curlett

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