Threaded connections with high and low friction coatings

Details Threaded connections with high and low friction coatings Threaded connections with high and low friction coatings

2006-11-29

2011-11-08

Hewitt, James (Department: 3679)

Pipe joints or couplings

With lubrication

C285S055000, C285S333000

Reexamination Certificate

active

08052173

ABSTRACT:
A threaded metallic joint has the thread surface of pin (100) and box (200) covered with a coating comprising a first layer (24) laid on the overall surface of the pin member (100), and a second layer (25) laid on part of the surfaces of either one of the pin or box members. In a first aspect, the coating comprises a first layer with high friction and anti-seize properties laid on the overall surface of the pin member (100), and a second layer (25) with low friction properties laid on specific parts of the surfaces of either one of the pin or box members. Preferably the specific surfaces are those which are in reciprocal radial contact during make-up until pin and box reach the point where shoulders (9, 10) abut. The second layer may contain polytetrafluoroethylene (PTFE). In a second aspect the first layer with a high friction and anti-seize properties laid on the overall surface of the box member (200).

REFERENCES:
patent: 633325 (1899-09-01), Luke
patent: 2733802 (1956-02-01), Truesdell
patent: 2741288 (1956-04-01), Johnson
patent: 4414247 (1983-11-01), Hubecker et al.
patent: 4468309 (1984-08-01), White
patent: 4474651 (1984-10-01), Yauchi et al.
patent: 4692988 (1987-09-01), Shulver et al.
patent: 4830411 (1989-05-01), Tsuru et al.
patent: 5253902 (1993-10-01), Petelot et al.
patent: 6027145 (2000-02-01), Tsuru et al.
patent: 6394190 (2002-05-01), Linden
patent: 6746057 (2004-06-01), Goto et al.
patent: 2003/0160446 (2003-08-01), Goto et al.
patent: 2004/0195826 (2004-10-01), Goto
patent: 2004/0239105 (2004-12-01), Matsumoto et al.
patent: 2733802 (1979-02-01), None
patent: 3432001 (1985-10-01), None
Feb. 27, 2009 European Office Action in European Patent Appln. No. 06841276.6.
T. Castineiras, et al., “Dry Dope-free OCTG Connections: A novel Environmentallly Friendly Technology Validated Through Diverse and Severe Field Conditions”, SPE/IADC Drilling Conference and Exhibition, Amsterdam, The Netherlands, (Mar. 17-19, 2009); pp. 1-12.

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