Fishtail bore seal

Details Fishtail bore seal Fishtail bore seal

2006-07-13

2010-10-26

Bochna, David E (Department: 3679)

Pipe joints or couplings

Packed

Wedge

C285S333000, C277S314000, C277S614000

Reexamination Certificate

active

07819439

ABSTRACT:
A bore seal for connecting and sealing oil and gas tubular members is disclosed which has a metal core manufactured from a high yield strength ferrous material and a protective overlay of corrosion and abrasion resistant stainless steel and/or nickel based alloy. The protective overlay is applied to the entire outer surface of the bore seal by a metal thermal spray process, such as plasma thermal spraying. In a preferred embodiment of the invention, the bore seal has a fishtail profile which facilitates the use of resilient seals to provide resistance to external pressures in addition to the traditional metal-to-metal seal between the bore seal and the tubular members. In an alternative embodiment, a pressure relief valve is disposed within the bore seal to verify the integrity of the metal-to-metal seal with respect to internal bore pressure.

REFERENCES:
patent: 2376017 (1945-05-01), Smallpeice
patent: 3307860 (1967-03-01), Blount et al.
patent: 3507506 (1970-04-01), Tillman
patent: 3556568 (1971-01-01), King
patent: 4336958 (1982-06-01), Goetzinger
patent: 4470609 (1984-09-01), Poe
patent: 4474381 (1984-10-01), Wilkins et al.
patent: 4635967 (1987-01-01), Stephenson
patent: 4984830 (1991-01-01), Saunders
patent: 5103915 (1992-04-01), Sweeney et al.
patent: 5839765 (1998-11-01), Carter et al.
patent: 6070911 (2000-06-01), Namikawa et al.
patent: 6322087 (2001-11-01), Swensen et al.
patent: 6409176 (2002-06-01), Allen
patent: 6450507 (2002-09-01), Johnson
patent: 6561521 (2003-05-01), Janoff et al.
patent: 6722426 (2004-04-01), Sweeney et al.
patent: 7025360 (2006-04-01), Walker et al.
patent: 2003/0155721 (2003-08-01), Zheng
patent: 2004/0056432 (2004-03-01), Walker et al.
patent: 2311795 (1997-10-01), None
patent: 2342371 (2000-04-01), None
patent: 2377976 (2003-01-01), None
patent: 2395530 (2004-05-01), None
patent: 2407850 (2005-05-01), None
patent: WO 2004/029487 (2004-04-01), None
Nicholas, M.G., “Joining Processes” (Introduction to brazing and diffusion bonding), Kluwer Academic Publishers, pp. 16-21; 230-31; 234-41 (1998).
Burakowski, T. and Wierzchon, T., “Surface Engineering of Metals,” crc Press, pp. 189-99 (1999).
Heimann, R.B., “Plasma-Spray Coating” VCH, pp. 167-68; 248-49 (1996).
Kazakov, N. F., “Diffusion Bonding of Materials,” Mir Publ., Pergamon Press, pp. 10-17 (1985).
Dorfman, M.R. & Novinski, E., “Let's Talk Thermal Spray,” Products Finishing, pp. 11; 42-47 (Mar. 1993).
Gordon, England, “Thermal Spray Coatings: Nature of Thermal Spray Coatings” pp. 1-13 (website printed May 2, 2007) at http://www.gordonengland.co.uk/tsc.htm.
Korpiola, K., “High Temperature Oxidation of Metal, Alloy and Cermet Powders in HVOF Spraying Process.”(Doctoral Thesis) Helsinki U. of Tech. Publications, TKK-MK-160, Espoo, Finlad (2004) at http://lib.tkk.fi/Diss/2004/isbn9512273284/isbn9512273284.pdf.
Dunkerton, S., “Diffusion Bonding” TWI Knowledge Summary, 2001, pp. 1-4 at http://www.twi.co.uk/j32k/protected/bond—33/kssbd003.html.
UK Intellectual Property Office, Patents Act 1977: Combined Search and Examination Report Under Section 17 & 18(3) for foreign counterpart divisional application GB0723691.2.
UK Intellectual Property Office, Patents Act 1977: Combined Search and Examination Report Under Section 17 and 18(3) for foreign counterpart application GB0610786.6.

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