Sand lift tool, system and method
US11434723B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2021 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Mar 27, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/35
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sand lift tool for use in a subterranean well can include an outer housing, an inner production tube positioned in the outer housing, and a dart received in the inner production tube. An annulus is positioned between the outer housing and the inner production tube. The dart can reciprocate in the inner production tube in response to variations in fluid flow between the annulus and an interior of the inner production tube. Another sand lift tool can include an outer housing, an inner production tube, and a sand collection annulus between the outer housing and the inner production tube. A flow area for fluid flow between the annulus and an interior of the inner production tube increases in response to an increase in a flow rate of the fluid flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.