Well system cementing plug
US9677372B2 · kind B2 · utility
3Cited by
40References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2014 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Jun 6, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wellbore cementing plug includes a plug element including a polymer. The polymer is deformable at a first stiffness when subjected to a first strain rate to allow the plug element to pass through a wellbore while sealing against passage of cement past the plug element. The polymer resists deformation at a second, higher stiffness when subjected to a second, higher strain rate to resist allowing the plug element to pass through the wellbore while sealing against passage of cement past the plug element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.