Apparatus for blocking communication between well bore intervals

Details Apparatus for blocking communication between well bore intervals Apparatus for blocking communication between well bore intervals

1986-01-31

1987-01-27

Novosad, Stephen J.

Wells

Central member with pre-set packer or plug in same conduit

166126, E21B 3310

Patent

active

046388605

ABSTRACT:
In the representative embodiment of the apparatus of the invention disclosed herein, a packer plug is arranged with sealing means for closing off the central bore of the mandrel of a packer that is set in a well bore for selectively isolating upper and lower formation intervals. When the plug is set in the packer mandrel, collet fingers on the body of the new and improved plug for threadedly engaging internal threads in the upper end of the packer mandrel. To secure the plug against unwanted release, a retainer member is cooperatively secured to the plug mandrel by a shear pin which will fail only at a predetermined force.

REFERENCES:
patent: 3136366 (1964-06-01), Brown et al.
patent: 3559732 (1971-02-01), Tucker
patent: 3687202 (1972-08-01), Young et al.

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