Pipe joints or couplings – Particular interface – Tapered
Patent
1984-10-02
1987-12-15
Grosz, Alexander
Pipe joints or couplings
Particular interface
Tapered
285379, 285355, F16L 1504
Patent
active
047128151
ABSTRACT:
A tubular connector for adjoining two adjacent joints comprising a first pin end on a first joint, a second pin end on a second joint and a tubular coupling member with suitable threads for mating with both pin ends. Each pin end is tapered and includes wedge threads. The wedge threads achieve a metal-to-metal seal upon makeup by providing a root-and-crest bearing surface prior to makeup. As an addition, a metal-to-metal conical seal can be provided in front of the most forward thread revolution on the pin ends. Further as an addition, an elastomeric seal can be provided in a circumferential groove just forward of the conical seal for making a compound seal therewith. A corrosion barrier ring can be included in the coupling member for filling the gap between the tip ends of the two pin ends being joined.
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"World Oil's 1986 Tubing Tables, copyright 1986, p. 41, Jan. edition.
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Grosz Alexander
Hydril Company
Nicholson Eric K.
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