Wells – Expansible anchor or casing – With wedge or cam and friction drag
Patent
1980-05-23
1982-03-02
Purser, Ernest R.
Wells
Expansible anchor or casing
With wedge or cam and friction drag
285 2, 403 2, 294 8618, E21B 33129
Patent
active
043174850
ABSTRACT:
A pump catcher apparatus is provided for supporting within a subterranean well a portion of a tubular conduit and a pump depending from the conduit. The apparatus comprises a control mandrel and a main body extending from the control body. Slip elements are provided on the main body for anchoring the pump catcher to the well conduit and are selectively shiftable to anchoring engagement with the casing by axial manipulation of the tubular conduit. A telescoping connection is provided between the control mandrel and the tubular conduit so that limited longitudinal movement of the tubular conduit will be permitted without disturbing the anchored engagement of the slip elements. Shearable members are provided between the control mandrel and the main body for selectively securing the main body to the mandrel and are severable by a predetermined force. Shock absorbing springs protect the severable elements from impact forces less than the predetermined force required to separate the control mandrel and the main body in the event that the slip elements fail to release.
REFERENCES:
patent: 2671640 (1954-03-01), Baker
patent: 2931438 (1960-04-01), Thompson
patent: 3282340 (1966-11-01), Park
patent: 3327784 (1967-06-01), Pardue
patent: 3960399 (1976-06-01), Dufrene
Baker International Corporation
Norvell, Jr. William C.
Purser Ernest R.
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