Pipe joints or couplings – With assembly means or feature – Guide and support
Patent
1977-04-04
1978-07-11
Schroeder, Werner H.
Pipe joints or couplings
With assembly means or feature
Guide and support
285330, 285347, 285354, 285DIG14, 285DIG15, 403307, 403341, 403343, F16L 3500
Patent
active
040997456
ABSTRACT:
A tool joint for drill pipe which is particularly well adapted for large diameter drill pipe, comprises a pin section and a box section. Each section of the tool joint is adapted at a first end to be attached to the drill pipe by welding, or threads, as is conventionally done. The principal part of the tool joint is of larger diameter than the pipe and includes a plurality of longitudinal, circumferentially-spaced tongues and grooves in the form of a jaw clutch. The tongues in the pin section match the grooves in the box section and vice versa. Means are provided to polarize the tongues and grooves so that they fit together in only one angular position. A tubular extension on the second end of the pin section is adapted to fit into a bored opening or socket in the second end of the box section. O rings or other means, are provided to seal the tubular extension into the bored opening. The outer circumferential surface of the enlarged portions of the tool joint sections are threaded with a selected, uniform diameter, thread. A threaded collar is screwed over the full threaded section. This locks the two tool joint sections in tension, while the tongues and grooves provide full torque transmitting capacity of the drill pipe.
REFERENCES:
patent: 1054812 (1913-03-01), Zierath
patent: 1542266 (1925-06-01), Palmer et al.
patent: 2094416 (1937-09-01), Sheffield
patent: 2307275 (1943-01-01), Johnson
patent: 2999701 (1961-09-01), Blair et al.
patent: 3361453 (1968-01-01), Brown et al.
patent: 3623753 (1971-11-01), Henry
patent: 3863959 (1975-02-01), Blaschke
Berman Conrad L.
Schroeder Werner H.
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