FIELD: oil and gas industry.
SUBSTANCE: surface of the nipple part (3), forming the sealing portion (13) is convex, and the surface of the sleeve (1), forming the sealing portion (11) is conical. At the nipple part (3), the thickness ts of the nipple part is assumed equal 15 mm or less, the coefficient ts/D of the form (where D is the outer diameter of the pipe section without the nipple part) is assumed to be 0.045 or more, and the full-length thread ratio L/t (where L is the length of the nipple part with full thread, t is the wall thickness of the pipe section without the nipple part) is taken to be 4.0 or less.
EFFECT: tightness, prevention of scoring in a state of simultaneous exposure to high external pressure and high compressive stress.
3 cl, 1 tbl, 5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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RU2310058C2 |
| THREADED CONNECTION FOR PIPES | 2020 |
|
RU2782310C1 |
| THREADED CONNECTION FOR STEEL PIPES | 2019 |
|
RU2762926C1 |
| THREADED JOINT FOR PIPES | 2011 |
|
RU2522756C1 |
