Wells – Expansible anchor or casing – With wedge or cam and friction drag
Patent
1976-02-18
1976-11-23
Leppink, James A.
Wells
Expansible anchor or casing
With wedge or cam and friction drag
E21B 2300
Patent
active
039931285
ABSTRACT:
A tubular mandrel is provided with outer housing means slidable thereon. Slip segments are formed on the outer housing means and a cone shaped enlargement is formed on the mandrel. Segmented cone means is slidably mounted on the mandrel between the mandrel and outer housing means. Cooperating latch means including a J-shaped slot in the outer housing means receive lug means positioned on the mandrel. Bow spring means on the housing means engage the well bore casing as the tool is lowered into the well bore to position the lug in the J-slot so as to inhibit relative longitudinal and rotational movement between the mandrel and outer housing means. When the mandrel is moved in the other direction in the well bore casing and rotated, the outer housing is restrained by the bow spring means engagement with the well bore casing. The relative movement, longitudinal and rotational between the mandrel and housing positions the lug and slot to thereafter accommodate longitudinal movement of said mandrel in said outer housing to engage said slip segments, segmented cone means and cone shaped enlargement for urging said slip segments radially into gripping engagement with an enlarged well bore casing.
REFERENCES:
patent: 1066000 (1913-07-01), Grumpton
patent: 2156939 (1939-05-01), Fulkerson
patent: 2345888 (1944-04-01), Scott
patent: 3286772 (1966-11-01), Solari et al.
Hayden Jack W.
Leppink James A.
Texas Iron Works, Inc.
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