Invention Grant
- Patent Title: Tubular threaded joint
- Patent Title (中): 管状螺纹接头
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Application No.: US12232362Application Date: 2008-09-16
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Publication No.: US07823931B2Publication Date: 2010-11-02
- Inventor: Takahiro Hamamoto , Katsutoshi Sumitani , Masaaki Sugino , Michihiko Iwamoto , Miyuki Yamamoto , Jean-Francois Charvet-Quemin , Benoit Le Chevalier , Eric Verger
- Applicant: Takahiro Hamamoto , Katsutoshi Sumitani , Masaaki Sugino , Michihiko Iwamoto , Miyuki Yamamoto , Jean-Francois Charvet-Quemin , Benoit Le Chevalier , Eric Verger
- Applicant Address: JP Osaka unknown Aulnoye-Aymeries
- Assignee: Sumitomo Metal Industries, Ltd.,Vallourec Mannesmann Oil & Gas France
- Current Assignee: Sumitomo Metal Industries, Ltd.,Vallourec Mannesmann Oil & Gas France
- Current Assignee Address: JP Osaka unknown Aulnoye-Aymeries
- Agency: Clark & Brody
- Priority: JP2006-099296 20060331
- Main IPC: F16L25/00
- IPC: F16L25/00

Abstract:
A tubular threaded joint which has excellent resistance to compression and which permits easy tightening operation in the field in a vertical state comprises a pin having a male threaded zone and a box having a female threaded zone. The pin or the box has an end shoulder surface on its end, and the other member has a shoulder surface which abuts against the end shoulder surface. The screw threads of the male threaded zone and the female threaded zone are trapezoidal threads having a crest, a load flank, and a stabbing flank. The lip length, which is the distance in the axial direction of a member having an end shoulder surface between the end shoulder surface and the closest engaged thread to that surface, is at least 140 times the stabbing flank clearance, which is the distance in the axial direction between the stabbing flanks of the male thread and the female thread when the load flanks of the male and female threads contact each other. The stabbing flank of the male thread is preferably chamfered.
Public/Granted literature
- US20090200798A1 Tubular threaded joint Public/Granted day:2009-08-13
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