Tool joint connection with interlocking wedge threads

Details Tool joint connection with interlocking wedge threads Tool joint connection with interlocking wedge threads

1993-06-15

1995-10-03

Nicholson, Eric K.

Pipe joints or couplings

Particular interface

Tapered

285334, 285390, F16L 1500

Patent

active

054546052

ABSTRACT:
A tubular connection is shown having wedge threads, the individual threads preferably interlocking by having wider crest dimensions than respective root dimensions, but with the stab flanks and load flanks generally angling in the same direction with respect to the longitudinal axis of the connection. Thus, when the stab flank is positive, it is less positive than the load flank is negative. Conversely, when the stab flank is negative, it is more negative than the load flank is positive. Preferably, the roots and crests radially interfere prior to full makeup. The connection achieves distribution over the entire thread length of the bearing stresses that resist torsional makeup, of the torque load, and of sealing. The slant of the flanks achieves self-centering of the pin member with respect to the box member either during assembly or disassembly depending on the angling in the respective embodiments.

REFERENCES:
patent: Re34467 (1993-12-01), Reeves
patent: 3224799 (1965-12-01), Blose et al.
patent: 3989284 (1976-11-01), Blose
patent: 4161332 (1979-07-01), Blose
patent: 4192533 (1980-03-01), Blose
patent: 4671544 (1987-06-01), Ortloff
patent: 4703954 (1987-11-01), Ortloff et al.
patent: 4703959 (1987-11-01), Reeves et al.
patent: 4712815 (1987-12-01), Reeves
patent: 4822081 (1989-04-01), Blose

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