Packer mill
US5881816A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Apr 11, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B31/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A packer mill system for milling a packer in a wellbore has been invented which has, in certain aspects, a bushing with a hollow generally cylindrically shaped bushing body with a bottom, a top, a bushing bore extending therethrough from top to bottom, and at least one key on an interior surface thereof, the at least one key projecting inwardly into the bushing bore, a mandrel initially disposable within the bushing, the mandrel having a hollow generally cylindrically shaped mandrel body with a top, a bottom, a mandrel bore extending therethrough from top to bottom, and a slot system formed in an exterior surface of the mandrel body, the at least one key disposed for movement through the slot system, engagement apparatus connected to the bottom of the mandrel body for engaging the packer, milling apparatus connected to the bottom of the bushing body and disposed for movement therethrough of the engagement apparatus, the slot system having a series of one or more interconnected slots through which the at least one key is movable, the series of interconnected slot(s) including one or more exits at the top and at the bottom for movement of the at least one key out from the slot system…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.