Downhole degradable staging tool
US11761305B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Dec 1, 2021 |
| Grant date | Sep 19, 2023 |
| Priority date | — |
| Expiry date | Dec 1, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for selectively opening a passage through a downhole casing comprises an elongate cylindrical housing defining a central bore therein and having at least one passage extending therethrough between the central bore and an exterior of the housing, the housing being configured to be located in line within a downhole casing, a ball seat slidably located within the central bore so as to be operable to selectively cover or uncover the at least one passage and a sealing sleeve slidably located within the central bore between an open and closed position wherein the sealing sleeve valve covers the at least one passage in the closed position and uncovers the at least one passage in the open position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.