公开(公告)号：JP5371007B2

公开(公告)日：2013-12-18

申请号：JP2009264326

申请日：2009-11-19

Applicant: 新日鐵住金株式会社 ,  バローレック・マネスマン・オイル・アンド・ガス・フランス

Inventor： 達也 山本 ,  琢也 辻村 ,  重夫 永作 ,  雅也 木本

IPC: F16L15/04 ,  C25D7/04

Abstract: PROBLEM TO BE SOLVED: To provide a screw joint for an oil well pipe easily manufactured in comparison with conventional ones and having excellent seizure resistance. SOLUTION: An integral type screw joint includes a box 3 formed at the end of a first oil well pipe, and a pin 2 formed at the end of a second oil well pipe and inserted in a box 3. The inner surface of the box 3 includes an internal thread part formed with a plurality of internal threads 31, and an inner surface metal seal part. The outer surface of the pin 2 includes an external thread part formed with a plurality of external threads 21, and an outer surface metal seal part corresponding to the inner surface metal seal part. A plating layer is formed on the external thread part and outer surface metal seal part of the pin 2 by a brush plating method. COPYRIGHT: (C)2011,JPO&INPIT