Wells – Packers or plugs – With expanding anchor
Patent
1981-02-17
1983-07-19
Novosad, Stephen J.
Wells
Packers or plugs
With expanding anchor
166120, E21B 33128, E21B 33129
Patent
active
043939295
ABSTRACT:
There is disclosed an hydraulically set well packer wherein sleeves carried about a tubular member which is connected as part of a tubing string are adapted to be moved from axially extended to axially retracted position in order to expand packing and slip elements carried about one of the sleeves into engagement with the well bore in which the string is disposed. The packer also includes means which forms an atmospheric chamber including a piston on one of the sleeves, and a means for locking the sleeves in retracted position is disposed within such chamber. The slip assembly carried by the packer includes upper and lower bowls and upper and lower sets of interconnected slips which are carried by the bowls for sliding thereover between radially contracted and expanded positions in response to movement of the slip bowls toward and away from one another as the sleeves move between extended and retracted positions.
REFERENCES:
patent: 3112796 (1963-12-01), Myers
patent: 3189095 (1965-06-01), Rochemont
patent: 3361209 (1968-01-01), Edwards, Jr.
patent: 3456723 (1969-07-01), Current et al.
patent: 3659647 (1972-05-01), Brown
patent: 4018274 (1977-04-01), Cochran
patent: 4078606 (1978-03-01), Montgomery
patent: 4216827 (1980-08-01), Crowe
AVA International
Novosad Stephen J.
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