Self-locating reentry system for downhole well completions
US6244340A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1998 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Sep 23, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/095
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A self-locating reentry system is provided to allow reliable reentry from a primary wellbore into one or more secondary wellbores. The reentry system may include one or more self-locating assemblies which may be engaged with selected portions of a lateral opening disposed between the primary wellbore and a respective secondary wellbore. Each self-locating assembly and respective key or lug cooperate with each other to provide optimum location and alignment relative to the lateral opening for communication of well tools and smaller diameter tubing strings between the primary wellbore and the associated secondary wellbore. A retaining mechanism is preferably provided to maintain the locator lug or key in its first retracted position until the reentry system is at a desired downhole location relative to the selected lateral opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.