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Patent Searching and Data


Title:
THREADED JOINT FOR PIPE, AND MANUFACTURING METHOD OF THREADED JOINT FOR PIPE
Document Type and Number:
WIPO Patent Application WO/2017/110685
Kind Code:
A1
Abstract:
A threaded joint for a pipe is provided which has excellent misalignment resistance and suitable shoulder ring torque, and which further has excellent corrosion resistance and excellent adhesion to a solid lubricant film; also provided is a manufacturing method of said threaded joint for a pipe. This threaded joint for a pipe is provided with a pin (13) and a box (14). The pin (13) and the box (14) have a contact surface that includes a thread portion (15) and (20) and an unthreaded metal contact portion. Disposed on the contact surface of the pin (13) and/or of the box (14), the threaded joint for a pipe comprises an alloy plating layer (21) of a Zn-Ni alloy, a phosphate film (22), and a solid lubricant film (23). The alloy plating layer (21), the phosphate film (22) and the solid lubricant film (23) are laminated in that order from the contact surface side.

Inventors:
GOTO, Kunio (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
KIMOTO, Masanari (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2016/087610
Publication Date:
June 29, 2017
Filing Date:
December 16, 2016
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
VALLOUREC OIL AND GAS FRANCE (54 rue Anatole France, AULNOYE-AYMERIES, 59620, FR)
International Classes:
F16L15/04; C23C22/18; C23C28/00; C25D5/26; C25D7/00
Domestic Patent References:
WO2009057754A12009-05-07
WO1996010710A11996-04-11
Foreign References:
JP2002327874A2002-11-15
JP2008527249A2008-07-24
JP2008537062A2008-09-11
JP2004053013A2004-02-19
JP2008215473A2008-09-18
JPH08105582A1996-04-23
Other References:
See also references of EP 3396222A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (5-17, Dojima 1-chome Kita-ku, Osaka-sh, Osaka 03, 〒5300003, JP)
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