Self-energizing locking mechanism

Details Self-energizing locking mechanism Self-energizing locking mechanism

1983-01-31

1984-09-04

Novosad, Stephen J.

Wells

Central chamber sealed with respect to prepositioned...

166134, 166138, 166 88, 166217, 285141, E21B 3304

Patent

active

044691726

ABSTRACT:
A locking mechanism for securing an inner member of a well assembly to the bore of a support or outer member has features that prevent any movement of the inner member due to a force acting along the axis of the bore. The locking mechanism includes a plurality of wicker grooves formed in a sidewall of the bore transverse to the axis of the bore. Reacting grooves are formed on an outer wall of the inner member perpendicular to the axis of the bore. Slips are spaced around the outer wall of the inner member between the inner member and the sidewall of the bore. The slips each have wicker grooves on the exterior and reacting grooves on the interior. The locking mechanism includes an expansion device for moving the slips from the contracted position in which the wickers are nonengaging to an expanded position in which the wickers engage each other. The reacting grooves of the inner member each have an inclined surface facing generally outwardly and in the direction of the force. The force acting on the inner member causes the reacting grooves to transmit a resultant force to the slips to push more tightly against the bore.

REFERENCES:
patent: 2754134 (1956-07-01), Watts et al.
patent: 2755864 (1956-07-01), Vaughn
patent: 2849245 (1958-08-01), Baker
patent: 2880806 (1959-05-01), Davis
patent: 3134610 (1964-05-01), Musolf
patent: 3800869 (1974-04-01), Herd et al.
patent: 4109945 (1978-08-01), Manchester et al.
patent: 4212487 (1980-07-01), Jones et al.
patent: 4330143 (1982-05-01), Renean
Hughes Offshore Drawing-Casing Hanger Type TF-8.

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