Dual hydraulic set packer

Details Dual hydraulic set packer Dual hydraulic set packer

1989-04-06

1990-06-05

Suchfield, George A.

Wells

Packers or plugs

With expanding anchor

166189, 166313, E21B 2306, E21B 33122

Patent

active

049305735

ABSTRACT:
A dual string packer for releasable, hydraulic setting within a wall casing is disclosed. The packing seal elements and hydraulic actuator assembly are mounted for sliding movement along primary and secondary packer mandrels. Setting forces are applied to the packing seal elements by a setting cylinder which is mounted for slideable, sealing engagement against the primary and secondary packer mandrels, and setting forces are applied to the anchor slips by a piston which is sealed against the primary and secondary packer mandrels. The set condition is maintained by a pair of locking rods and segmented ratchet slips. The locking rods are carried by the setting cylinder head and are retracted axially out of piston pockets as a variable volume pressure chamber is pressurized. Upon achieving set engagement of the anchor slips and seal elements, the locking rods are trapped in compression between the head of the setting cylinder and the segmented ratchet slips. The locking rods are compressed by the reaction forces imposed by the expandable seal elements through the head of the setting cylinder, and by the retraction forces transmitted through the anchor slips and piston.

REFERENCES:
patent: 3167127 (1965-01-01), Sizer
patent: 3381752 (1968-05-01), Elliston
patent: 3414058 (1968-12-01), DeRochamont
patent: 3467184 (1969-09-01), Young
patent: 3658127 (1972-04-01), Cockran et al.
patent: 4216827 (1980-08-01), Crowe
patent: 4413677 (1983-11-01), Perkins
patent: 4657084 (1987-04-01), Evans
patent: 4745971 (1988-05-01), Akkerman
patent: 4754812 (1988-07-01), Gentry
patent: 4834175 (1989-05-01), Ross et al.

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