Dual string packer mill

Details Dual string packer mill Dual string packer mill

1985-08-19

1987-09-29

Leppink, James A.

Handling: hand and hoist-line implements

Grapple

Well type

166 98, 166 99, 294 8618, 294 8625, 294 8634, E21B 3116, E21B 3120

Patent

active

046965025

ABSTRACT:
A dual string packer is milled by a mill having an annular milling shoe for milling the periphery of the packer and freeing it from the well bore. An axial milling head mills a central hole in the top of the packer before the annular shoe reaches the locking segments. A grapple above the milling head engages the walls of the axial hole to support the remains of the packer in the well. The grapple includes a release ring that can be broken in tension to release the packer mill from a stuck packer if need be. The grapple has a gripper sleeve with longitudinally extending fingers and a camming sleeve for camming the fingers outwardly. An expandable ring inside the camming sleeve provides means for withdrawing the camming sleeve from the gripper sleeve if it should stick.

REFERENCES:
patent: 1445680 (1923-02-01), Guess
patent: 1789247 (1931-01-01), Miller
patent: 1903109 (1933-03-01), Hampton
patent: 2904114 (1959-09-01), Webb et al.
patent: 3019840 (1962-02-01), Kennard
patent: 3095926 (1963-07-01), Rush
patent: 3131762 (1964-05-01), Dye
patent: 3150718 (1964-09-01), Crowe
patent: 3352593 (1967-11-01), Webb
patent: 4616721 (1986-10-01), Furse

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