One trip well drilling to total depth
US7478686B2 · kind B2 · utility
5Cited by
14References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2005 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Dec 20, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/103
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Drilling a well to total depth without tripping the bit out of the hole despite encountering a troublesome zone is made possible by using a memory based composite material delivered with the drill pipe or advanced over it, as needed. The material can be activated as a troublesome zone is encountered and assumes as former configuration that places it in sealing relation to the troublesome zone in the bore hole while spacing it from the drill pipe so as to allow resumption of drilling with the troublesome zone isolated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.