Apparatus for use in drilling a well at an offshore location
US4987956A · kind A · utility
30Cited by
21References
11Claims
0Family size
Inventors
Key dates
| Filing date | Aug 30, 1989 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | Aug 30, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S285/92
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus is disclosed for use in drilling an offshore well wherein a drill string suspended from a drill ship for extension within a riser pipe, lower marine riser package and subsea wellhead including a blowout preventer stack may be sheared at a location intermediate the lower end of the riser pipe and a flex or ball joint of the riser package.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.