Downhole tool release mechanism

Details Downhole tool release mechanism Downhole tool release mechanism

1995-05-05

1996-06-18

Tsay, Frank S.

Wells

Processes

Placing or shifting well part

1661176, 166120, E21B 2304

Patent

active

055268846

ABSTRACT:
A system for releasing a downhole tool such as a packer is revealed which allows the tool to retain its set position against a very high loading force which can occur during operations such as perforating or acidizing or other formation treatments. Subsequently, before environmental conditions can adversely affect the integrity of the locking mechanism which employs a movable sleeve or equivalent, the release mechanism involving such a sleeve or equivalent is actuated. This disables one of the locking mechanisms on the tool and enables a shear-release mechanism, which is preferably set at a fairly low shear force to facilitate simple removal of the downhole tool at a later time when it becomes necessary to retrieve it.

REFERENCES:
patent: 3603388 (1971-09-01), Current
patent: 4754814 (1988-07-01), Jordan
patent: 4834185 (1989-05-01), Braddick
patent: 5044441 (1991-09-01), Rubbo et al.
patent: 5350013 (1994-09-01), Jani et al.
patent: 5360069 (1994-11-01), Schmuck et al.
patent: 5411082 (1995-05-01), Kennedy
Baker Oil Tools, "Standard Products Technical Manual," Unit No. 8268 (Apr. 1989) (2 pages).
Baker Oil Tools, Model FH, "Retrievable Packer Systems," (p. 29) no date.

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