Microwave-based downhole activation method for wellbore consolidation applications
US8122950B2 · kind B2 · utility
8Cited by
12References
11Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 8, 2009 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | Jan 20, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/138
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Wellbore strengthening during drilling may be achieved by including chemicals in the drilling fluid that can be polymerised when exposed to microwave energy. Selected chemicals are mixed with the drilling fluid but do not react with it. The chemicals concentrate in a filter cake on the borehole wall during drilling-fluid circulation. A tool, which comprises a microwave source, is used to trigger polymerisation or crosslinking reactions within the filter cake. The polymerisation or crosslinking reactions cause the formation of a film or gel that strengthens the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.