External sleeve cementer
US11885197B2 · kind B2 · utility
0Cited by
36References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2021 |
| Grant date | Jan 30, 2024 |
| Priority date | — |
| Expiry date | May 20, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A stage cementing tool for use in a wellbore comprises a mandrel having a plurality of circumferentially spaced first longitudinal slots and a plurality of circumferentially spaced second longitudinal slots. An opening sleeve is disposed in the mandrel in a first position and movable relative thereto. A setting sleeve disposed about the mandrel is connected to the opening sleeve and movable therewith. A drive sleeve disposed in the mandrel above the opening sleeve is connected to and movable with a closing sleeve disposed about the mandrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.