Large-width/diameter riser segment lowerable through a rotary of a drilling rig
US9909379B2 · kind B2 · utility
9Cited by
9References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 2017 |
| Grant date | Mar 6, 2018 |
| Priority date | — |
| Expiry date | May 16, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This disclosure includes auxiliary-line riser segment assemblies (e.g., with isolation units) that are suitable for managed pressure drilling (MPD) and that can be lowered (e.g., when connected to other riser segment assemblies) through a rotary of a drilling rig. Some embodiments are configured to have portions of the auxiliary lines connected (e.g., without welding) below the rotary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.