Buoyancy assist tool with center diaphragm debris barrier
US10989013B1 · kind B1 · utility
5Cited by
26References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2019 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Nov 20, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/063
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole apparatus comprises a casing string with a removable plug therein to block flow therethrough. A flow barrier is positioned in the casing below the removable plug and the removable plug and the flow barrier defining a buoyancy chamber therebetween. A debris barrier positioned above the removable plug comprises a rigid annular ring with a flexible diaphragm covering the center opening defined by the annular ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.