E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/59
E21B 23/00 (2006.01) E21B 33/04 (2006.01)
Patent
CA 1196275
ABSTRACT OF THE DISCLOSURE 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 cuter 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.
438390
Gowling Lafleur Henderson Llp
Hughes Tool Company
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