Abandoning offshore well
US4688640A · kind A · utility
22Cited by
8References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1986 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Jun 20, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/119
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for abandoning an offshore oil or gas well drilled into the ocean floor having a plurality of concentric strings of pipe having throughbores and spaced to form an annular space between adjacent pipe strings. The invention includes perforating the pipe string with an explosive charge of a size, composition, and velocity so as to only penetrate one pipe string without damaging or penetrating any other pipe string in the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.