Method and apparatus for locating and re-entering one or more horizontal wells using whipstock with sealable bores
US5318121A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1992 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Aug 7, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B41/0035
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In accordance with the present invention, a plurality of methods and devices are provided for solving important and serious problems posed by lateral (and especially multilateral) completion including methods and devices for re-entering selected lateral wells to perform completions work, additional drilling, or remedial and stimulation work. Various methods and devices are provided for assisting in the location and re-entry of lateral wells. Such re-entry devices include permanent or retrievable deflector (e.g., whipstock) devices. Preferably, the re-entry methods of this invention permit the bore size of the lateral wells to be the same or substantially the same bore size as the vertical wells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.