Method for the drilling of the initial phase of deep water oil wells with an underwater well head
US7055623B2 · kind B2 · utility
4Cited by
16References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2001 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Nov 12, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Improved method for the drilling of the initial phase of deep water oil wells with an underwater well head consisting in the positioning and cementation of the conductor pipe and anchorage casing by means of a single drilling phase. A tapered hole (with a double diameter) is drilled using a drill string consisting of a motor driven pilot bit and a reaming bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.