Tool joint for drill pipes

Details Tool joint for drill pipes Tool joint for drill pipes

1975-10-29

1977-01-11

Arola, Dave W.

Pipe joints or couplings

Particular interface

Annular socket

285333, F16L 2500

Patent

active

040023591

ABSTRACT:
The invention relates to a tool joint for drill pipes.
According to the invention the tool joint consists of a threaded sleeve having an internal cylindrical recess, a pin 2 is threaded into the sleeve and has an internal cylindrical recess b, in which a convergent-divergent nipple 3 is pressure fitted, said nipple resisting the bending moments arising in the threaded joint and in the two critical zones of the drill pipe. The nipple permits self-balancing of said bending moments and the reduction and equalization of their values across each contact face of the nipple ends.

REFERENCES:
patent: 1449773 (1923-03-01), Miller
patent: 1839676 (1932-01-01), Hicks
patent: 3186738 (1965-06-01), Dalrymple
patent: 3188123 (1965-06-01), Hansen

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