Smart filter cake for strengthening formations
US10208561B2 · kind B2 · utility
0Cited by
20References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2015 |
| Grant date | Feb 19, 2019 |
| Priority date | — |
| Expiry date | Mar 30, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/13
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of sealing a formation that includes drilling a wellbore through the formation while pumping a non-aqueous based wellbore fluid comprising an encapsulated first component into the wellbore, the non-aqueous based wellbore fluid forming a filter cake on the walls of the wellbore; and adding a second component to the wellbore fluid when fluid losses are registered during drilling, whereby the first and second components react to form a chemical sealing layer in the filter cake is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.