Method and apparatus for aligning drill pipe and tubing

Details Method and apparatus for aligning drill pipe and tubing Method and apparatus for aligning drill pipe and tubing

1997-10-14

1999-09-14

Bagnell, David

Boring or penetrating the earth

With tool shaft detail

1662426, 285330, 285913, 285914, 403364, E21B 17046

Patent

active

059507446

ABSTRACT:
A pipe joint for self aligning a drill string, tubing string or casing string of the type comprising a plurality of drill pipe, tubing or casing sections arranged in end to end relation from a location above the ground to a lower location adjacent a tool connected to a bottom end of the string and wherein the adjacent ends of the sections are connected to each other to form a plurality of spaced joints extending downwardly from the ground to the tool, the improvement wherein each joint comprises an upper section having at least one downwardly projecting extension and a lower section having a corresponding recess for receiving the extension and wherein the extension and the recess can fit together in only one way.

REFERENCES:
patent: 1438751 (1922-12-01), Isles
patent: 1547759 (1925-07-01), Journeay
patent: 3287031 (1966-11-01), Simmons et al.

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