Buoyancy assist tool with overlapping membranes
US11072990B2 · kind B2 · utility
1Cited by
29References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2019 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | Dec 3, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole apparatus has a casing string and a degradable plug positioned in the casing string to block flow therethrough. An upper membrane covers an upper end of the degradable plug. The upper membrane is made up of a plurality of separable membranes. A lower membrane covers a lower end of the degradable plug and is comprised of a plurality of separable membranes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.