Wells – Expansible anchor or casing – Expansible means translated by wedge or cam
Patent
1981-08-31
1982-11-16
Novosad, Stephen J.
Wells
Expansible anchor or casing
Expansible means translated by wedge or cam
166118, E21B 33128, E21B 33129
Patent
active
043590900
ABSTRACT:
An anchoring mechanism for a well packer includes plural bidirectional one piece slip members which are radially extendable into gripping engagement with a well conduit. The slip members are engaged by wedge surfaces on cooperating upper and lower slip cones. Only the lower slip cone is fitted with grooves which are adapted to receive laterally projecting tongues on the slip members for retaining the slip members in assembly with the remainder of the anchoring mechanism. The anchoring mechanism includes a plurality of longitudinally extending brackets having laterally projecting ears which are engageable with inclined slots cut in opposite longitudinal sides of the slip members. The bracket members are connected to the upper slip cone for movement therewith by shear screws. Relative movement of the upper slip cone and the brackets toward the lower slip cone results in setting the lower end of the slip members followed by shearing of the screws to obtain relative movement of the upper slip cone with respect to the brackets to set the upper end portion of the slip members in gripping engagement with the well conduit.
REFERENCES:
patent: 3000443 (1961-09-01), Thompson
patent: 3011558 (1961-12-01), Conrad
patent: 3318384 (1967-05-01), Brown
patent: 3361209 (1968-01-01), Edwards, Jr.
patent: 3516493 (1970-06-01), McGill
patent: 3871447 (1975-03-01), Crowe
Baker International Corporation
Falk Joseph
Norvell, Jr. William C.
Novosad Stephen J.
Pitts Robert W.
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