Fusing materials for prevention of lost circulation
US7838469B2 · kind B2 · utility
2Cited by
3References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2008 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Mar 11, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/516
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method is given for reducing fluid loss in downhole operations such as drilling and completion. A composition containing a fusing solid is injected into the fluid loss flow path; the fusing solid fuses at formation temperature when the injection pressure is released and the formation matrix surfaces forming the flow path close on the composition. The fusing solid is gilsonite, or a similar material, or resin coated particles. The composition may optionally contain one or more of fibers, flakes, an activator, and a dispersant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.