Wellhead casing packing support

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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Details

277166, 277189, 277192, 277190, 166124, 166138, F16J 1506, E21B 3312

Patent

active

044075146

ABSTRACT:
A packing support assembly (10) which is sleeved about a well casing ("C"), or the like, and secured thereto without the need for piercing the casing wall or welding thereto. The support assembly (10) comprises a support ring (12) which is sleeved about the casing ("C") and secured thereto by a gripping means in the form of a plurality of clamping segments (14) having serrated surfaces (40) adapted to grip the external wall of the casing ("C"). The clamping segments (14) are held in an unactivated position by retaining screws (46) which secure the clamping segments (14) to the support ring (12). To activate, the clamping segments (14) are wedged inwardly to grip the casing ("C") by a plurality of activating pins (54) which are threadably received into the bottom of the support ring (12). The support ring (12) is provided with an internal wedging surface (26) which is slidably engagable with cooperating wedging surfaces (44) on the exterior of the clamping segments (14) upon rotation of the activating pins (54). The gripping force is adjustable as determined by the degree and method of turning the activating pins (54). The upper annular edge (64) of the support ring (12) is configured to support an annular packing, or the like, thereon.

REFERENCES:
patent: 1804619 (1931-05-01), Humason
patent: 1865121 (1932-06-01), Lotton
patent: 2683490 (1954-07-01), Brown
patent: 2720267 (1955-10-01), Brown
patent: 3024845 (1962-03-01), Conrad
patent: 3096824 (1963-07-01), Brown
patent: 3588130 (1971-06-01), Fowler et al.
patent: 4240561 (1980-12-01), Hagstrom et al.

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