Combination release mechanism for downhole well apparatus

Details Combination release mechanism for downhole well apparatus Combination release mechanism for downhole well apparatus

1981-06-03

1984-03-20

Leppink, James A.

Wells

Packers or plugs

With expanding anchor

166182, 166124, 166134, E21B 3312, E21B 2300

Patent

active

044375166

ABSTRACT:
A well packer or other downhole tool is provided with a combination shear and rotational release mechanism comprising a release member having a set of internal threads selectively engageable with a predetermined number of external threads formed on an elongated tubular mandrel. The release member is keyed to the packer outer housing which in turn is cooperable with the slip and packing element assemblies. The mandrel may be selectively subjected to a predetermined upward pulling force to shear the threads on the release member or, alternatively, the mandrel may be rotated a predetermined number of turns to disengage the cooperating threads on the release member to effect release of the packer from its set position.

REFERENCES:
patent: 3189095 (1965-06-01), De Rochemont
patent: 3288219 (1966-10-01), Young et al.
patent: 3659647 (1972-05-01), Brown
patent: 3976133 (1976-08-01), Allen
patent: 4216827 (1980-08-01), Crowe

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