Tubing handling for subsea oilfield tubing operations
US6408948B1 · kind B1 · utility
6Cited by
20References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1999 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Jul 14, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/076
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tubing handling for subsea oilfield tubing operations, includes an isolation tube to mechanically and/or chemically protect the drill string and improved passage of the drill string and fluid return line to the drilling vessel that further protects them during drilling use. In addition, the improvements include an automatic safety apparatus to hold against unintended movement of the tubular members under extreme length and weight conditions as well as against human error at the rig. Further, the invention includes multi-segment coiled tubing drill strings that can be adapted to drilling requirements in a deep wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.