Wells – Packers or plugs – Controllable passage through packer
Patent
1983-05-09
1984-09-04
Novosad, Stephen J.
Wells
Packers or plugs
Controllable passage through packer
E21B 3312
Patent
active
044691734
ABSTRACT:
An expendable plug assembly of the type adapted to be received within the bore of a well packer is shown having a shear sleeve and a plug body initially received within the shear sleeve interior. The plug body has a closed end for preventing flow of well fluid through the well packer when the plug body is in place within the shear sleeve. A lock ring is provided for releasably supporting the plug body within the shear sleeve interior. A collet body mounted about the plug body has a collet extension at one end thereof and a plurality of collet fingers at the opposite end thereof. The collet fingers are selectively engagable within the well packer bore to fix the plug assembly within the bore. Shear screws are provided for releasably connecting the collet extension to the shear sleeve. The shear screws are severable by downward movement of the shear sleeve relative to the collet extension. A support sleeve is slidably received adjacent the end of the plug body opposite the closed end and has an upper extent which is adapted to be received between the plug body and the collet fingers to secure the collet fingers within the packer bore when the sleeve is in place on the plug body. Equalizing ports are provided in the plug body and shear sleeve which communicate during the initial stages of the plug expending operation to reduce the piston effect of the plug in the packer bore and to facilitate removal of the plug assembly from the well packer.
REFERENCES:
patent: 2963092 (1960-12-01), Anderson
patent: 3642064 (1972-02-01), Rosenthal
patent: 4188999 (1980-02-01), Amancharla
Evans Robert W.
Gilbert Bruce
Felsman Robert A.
Gunter Jr. Charles D.
Hovis Timothy David
Hughes Tool Company
Novosad Stephen J.
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