Degradable in-line buoyant system for running casing in a wellbore
US11639641B2 · kind B2 · utility
2Cited by
8References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2020 |
| Grant date | May 2, 2023 |
| Priority date | — |
| Expiry date | Apr 5, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tool for running a casing string assembly into a wellbore includes a degradable plug assembly that temporarily isolates light fluid trapped in a lower portion of the casing string from heavier fluid in the upper portion of the casing string, thereby reducing the horizontal weight of the casing string by an amount sufficient to overcome a drag force. After the casing string is landed at a final location in the wellbore, fluid is introduced to the degradable plug assembly to degrade the plug and clear the axial passageway of the casing string so that tools or other equipment can pass therethrough.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.