Differential pressure sliding sleeve, and oil and gas well fracturing construction method using same
US12215580B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 10, 2021 |
| Grant date | Feb 4, 2025 |
| Priority date | — |
| Expiry date | Jun 10, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A differential-pressure sliding sleeve has an outer cylinder with a flow guiding hole being provided in a wall of the outer cylinder, an inner cylinder arranged in an inner cavity of the outer cylinder, an upper joint extending into the outer cylinder and fixedly connected to an upper end of the outer cylinder, a lower joint extending into the outer cylinder and fixedly connected to a lower end of the outer cylinder, and a dissolvable carrier ring arranged between the lower joint and the inner cylinder. An area of the axial upper end surface of the inner cylinder is greater than that of an axial lower end surface thereof, so that the working fluid generates a pressure difference to provide downward pressure for the inner cylinder, which moves downward under the pressure after the carrier ring is dissolved to open the flow guiding hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.