Method and apparatus for sealing between casing and wellhead con

Details Method and apparatus for sealing between casing and wellhead con Method and apparatus for sealing between casing and wellhead con

1999-05-07

1999-12-07

Suchfield, George

Wells

Processes

Placing or shifting well part

166 853, 166 882, 166 883, 166383, 166387, 277323, E21B 3304

Patent

active

059966955

ABSTRACT:
A method and apparatus for installing a metal annular seal (54) between the outer rough surface of a casing member (11) which has had a portion thereof cutaway with a remaining portion projecting upwardly from the upper end of a casing head (12). A slip installation tool (18) mounted on the upper end of the casing head (12) carries a slip assembly which includes segmented slips (42), a bushing (22), and a cam member (42). The slip installation tool (18) secures the slips (40) about the outer rough surface of the casing (11) as shown in FIGS. 7 and 8 with bushing (22) acting as a supporting base or foundation to oppose the forces from the camming action because of support from lock down screws (24). After mounting of the slip assembly about the casing (11), the installation tool (18) is removed, and the metal seal (54), formed of a relatively soft metal material, is mounted over the extending end of the casing (11). Positioning of the tubing head (50) on the casing head (12) as shown in FIGS. 14-16 deforms the metal seal (54) into metal-to-metal sealing relation between the outer rough surface of casing (11) and the inner frusto-conical sealing surface (96) of the tubing head (50).

REFERENCES:
patent: 1926856 (1933-09-01), Leman
patent: 3438654 (1969-04-01), Jackson, Jr. et al.
patent: 5205356 (1993-04-01), Bridges et al.
patent: 5257792 (1993-11-01), Putch et al.
patent: 5332043 (1994-07-01), Ferguson

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