Title:
SEALED THREADED JOINT FOR TUBING PIPES
Document Type and Number:
WIPO Patent Application WO/2014/014391
Kind Code:
A3
Abstract:
Sealed threaded joint for tubing pipes The invention belongs to the oil and gas-extraction industry. The joint contains male (1) and female (2) elements with trapezoidal threads (3) with 1:16 taper and contacting each other taper sealing (5) and bearing (6) end surfaces. The slope angle between the thread profile lead-in flank (7) and the thread axis normal line amounts to 10-24°, the slope angle between the load flank (8) and the thread axis normal line amounts to -4 to +5°. The thread profile crests (9) and lead-in flanks make gaps (10, 11) in between, 0,05-0,15 mm wide, during joint make-up process. The thread profile on the area of mating of the load flank and the crest and on the area of mating of lead-in flank and the crest is produced rounded, with the different rounding radii for the male and female elements. The bearing end surfaces have a 10-20° slope angle with the thread axis normal line. A slope angle between the sealing surface of the male element and the thread axis normal line amounts to 13-18°, a slope angle between the sealing surface of the female element and the thread axis normal line amounts to 8-12°. On the female element on the thread run-out area and on the area of mating of the sealing and the bearing end surfaces are produced circumferential grooves (12) and (14). The female element area of mating of the sealing surface and the circumferential groove (14) surface and the male element area of mating of the sealing surface and the thread run-out surface are produced rounded. High tightness of the joint under sufficient mechanical loads, its wear resistance during multiple makes and breaks and its operation are achieved.
Inventors:
PEKIN SERGEY ALEXANDROVICH (RU)
SHCHERBAKOV BORIS URIEVICH (RU)
EMELIANOV YURY FEDOROVICH (RU)
ALDOHIN VLADIMIR PETROVICH (RU)
SIDORENKO PAVEL NIKOLAEVICH (RU)
NIKIFOROV DENIS VIKTOROVICH (RU)
PONOMARENKO PAVEL KONSTANTINOVICH (RU)
SHCHERBAKOV BORIS URIEVICH (RU)
EMELIANOV YURY FEDOROVICH (RU)
ALDOHIN VLADIMIR PETROVICH (RU)
SIDORENKO PAVEL NIKOLAEVICH (RU)
NIKIFOROV DENIS VIKTOROVICH (RU)
PONOMARENKO PAVEL KONSTANTINOVICH (RU)
Application Number:
PCT/RU2013/000608
Publication Date:
July 24, 2014
Filing Date:
July 16, 2013
Export Citation:
Assignee:
TMK PREMIUM SERVICES LLC (RU)
International Classes:
E21B17/042; F16L15/00
Domestic Patent References:
| WO2004109173A1 | 2004-12-16 | |||
| WO2006022418A1 | 2006-03-02 |
Foreign References:
| US20040262919A1 | 2004-12-30 | |||
| FR2281488A1 | 1976-03-05 | |||
| US20100301603A1 | 2010-12-02 |
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