Title:
鋼管用ねじ継手
Document Type and Number:
Japanese Patent JP4275656
Kind Code:
B2
Abstract:
A threaded joint for steel pipes comprised of a pin (1) and a box (2) each having a threaded portion (1a, 2b) and an unthreaded contact portion (1b, 2a) exhibits adequate leakage resistance and galling resistance when used for makeup of oil country tubular goods with application of a green dope or even without any dope. The threaded joint has a first plating layer of Sn—Bi—Cu alloy plating formed on the contact surface of at least one of the pin (1) or the box (2). The first plating layer may have a second plating layer selected from Sn plating, Cu plating, and Ni plating on its lower side and at least one layer of a lubricating coating, and particularly a solid lubricating coating on its upper side.
Inventors:
Shigeo Nagasaku
Kunio Goto
Shigeo Onishi
Hiroaki Ikegami
Kunio Goto
Shigeo Onishi
Hiroaki Ikegami
Application Number:
JP2005255657A
Publication Date:
June 10, 2009
Filing Date:
September 02, 2005
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
Kansai Kika Kogyo Co., Ltd.
Kansai Kika Kogyo Co., Ltd.
International Classes:
F16L15/04; C10M103/06; C10M169/02; C25D5/26; C25D7/00; C10N10/12; C10N40/00; C10N50/08; C10N50/10
Domestic Patent References:
| JP2003074763A | ||||
| JP62287083A | ||||
| JP2003042353A | ||||
| JP2005514573A |
Attorney, Agent or Firm:
Shogo Ehara
Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura
Tsuyoshi Kumano
Hiroaki Yamane
Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura
Tsuyoshi Kumano
Hiroaki Yamane