Method of drilling and completing multiple wellbores inside a single caisson
US7264067B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2004 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Jun 1, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/305
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for drilling and completing multiple wellbores from a single drilling rig and from within a single wellhead is provided. In one embodiment, a template is disposed at a predetermined location downhole within a casing. In one aspect, a first casing string is lowered with the template to the predetermined location and disposed within a first wellbore. A second wellbore may be drilled through a bore in the template. A second casing string may then be lowered through the bore into the second wellbore. In another embodiment, at least two wellbores are drilled and completed from a surface casing having a crossover portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.