Sealing method and apparatus for wellheads

Details Sealing method and apparatus for wellheads Sealing method and apparatus for wellheads

1992-06-26

1994-07-05

Bui, Thuy M.

Wells

Processes

Placing or shifting well part

166196, 166348, 166368, 2771162, E21B 3312

Patent

active

053259254

ABSTRACT:
A metal-to-metal sealing method and apparatus for use on oil and/or gas wells, utilizes an upper seal member and a lower seal member, wherein the energizing of the seal members is staged to cause the lower seal member to become sealingly engaged. before the upper seal member becomes sealingly engaged. The seal members may have two seals of different construction; one seal is an interference type seal, and the other seal is a wedge type seal.

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"Advanced Sealing Technology," FMC Brochure, p. 5 and unnumbered page with FIG. 1 (undated).
"Development of an All-Metal-Sealing Subsea Wellhead System for Critical Service Applications", SPE Paper 23056, presented at 23rd OTC May 6-9, 1991, pp. 253-258.
"Seal Assembly", Dril-Quip Ad, undated.
"SB Subsea Wellhead System" National-Oilwell Bulletin No. 151, 1 page (undated).

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