Sliding sleeve device
US11933138B2 · kind B2 · utility
1Cited by
3References
8Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 10, 2021 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Jun 10, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/26
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sliding sleeve device has an outer cylinder, a circulation hole being provided in the wall of the outer cylinder; and an inner cylinder provided in an inner cavity of the outer cylinder. In an initial state, the inner cylinder and the outer cylinder are fixed to each other to seal the circulation hole. In a first state, the inner cylinder is movable relative to the outer cylinder, thereby unsealing the circulation hole. A protection mechanism is provided in the circulation hole, which has an inner member located on the radially inner side and an outer member located on the radially outer side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.