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Title:
THREADED JOINT FOR STEEL PIPES
Document Type and Number:
WIPO Patent Application WO2004109173
Kind Code:
A8
Abstract:
A threaded joint for steel pipes comprises a pin (1) and a box (2). The pin has male thread (11), a sealing surface (13), and a shoulder surface (14) located on the end face of the pin. Correspondingly, the box has female thread (21), a sealing surface (23), and a shoulder surface (24) which can mate or contact with the corresponding portions of the pin. The shoulder surface (14) of the pin (1) is provided at an end face of the pin. The sealing surface (13) of the pin (1) is located on a pipe end side near the male thread (11). A a nose portion (15) is provided on the pin (1) between the sealing surface (13) and the shoulder surface (14), the nose portion (15) being not in contact with a corresponding portion of the box (2).

Inventors:
SUGINO MASAAKI (JP)
YAMAMOTO MIYUKI (JP)
IWAMOTO MICHIHIKO (JP)
NAGASAKU SHIGEO (JP)
DUTILLEUL PIERRE (FR)
ROUSSIE GABRIEL (FR)
VERGER ERIC (FR)
Application Number:
PCT/JP2004/008146
Publication Date:
March 10, 2005
Filing Date:
June 04, 2004
Export Citation:
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Assignee:
SUMITOMO METAL IND (JP)
VALLOUREC MANNESMANN OIL & GAS (FR)
SUGINO MASAAKI (JP)
YAMAMOTO MIYUKI (JP)
IWAMOTO MICHIHIKO (JP)
NAGASAKU SHIGEO (JP)
DUTILLEUL PIERRE (FR)
ROUSSIE GABRIEL (FR)
VERGER ERIC (FR)
International Classes:
E21B17/042; F16L15/04; F16L15/06; (IPC1-7): F16L9/12
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