Telescopic stage cementer packer
US11519242B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2021 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Jun 23, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/146
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A stage cementing tool has a mandrel defining a central flow passage and a plurality of cementing passages in a wall thereof. A packer is disposed about the mandrel. A closing sleeve is detachably connected to and movable relative to the mandrel. An opening sleeve defining a plurality of fully open cement flow ports therethrough is telescopically movable relative to the closing sleeve and movable relative to the mandrel. The opening sleeve is movable to move the packer to the set position, and thereafter movable to open a cement flow path between the central flow passage and an annulus defined by the stage cementing tool and the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.