Milling tool and method for removing a packer
This patent describes a packer milling and retrieval tool including a mandrel having an upper milling portion with cutting blades for engaging the upper milling portion with cutting blades for engaging the upper end of a packer in cutting relation, and a lower retrieval portion for contacting the lower end of the packer for removal of the packer from the casing. It comprises an improved release means; a sleeve mounted on the mandrel; the sleeve when fingers are disengaged from the packer abutment and spaced downwardly therefrom being slidable upwardly on the mandrel from a differential fluid pressure exerted against opposite ends of the sleeve provided by pressurized drilling fluid discharged from the tool upon the upper end portion approaching the small diameter bore portion from lifting of the mandrel to position the fingers adjacent the reduced diameter portion for inward deflection of the fingers to permit the fingers to pass the packer bore upon upward lifting movement of the mandrel to release the tool from the packer.
- Assignee:
- Baker Hughes Inc. (United States)
- Patent Number(s):
- US 5123489; A
- Application Number:
- PPN: US 7-663095
- OSTI ID:
- 7103751
- Country of Publication:
- United States
- Language:
- English
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