Automatic flow control valve
US11384621B2 · kind B2 · utility
Inventor
Key dates
| Filing date | May 18, 2018 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | May 23, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus and method for controlling the flow of a fluid from a subterranean well zone to a pipe located within a bore in the well zone. The apparatus comprises an elongate tubular body having an interior passage and a valve passage extending between an exterior of the tubular body and the interior passage with a sliding sleeve adapted to selectably cover and uncover the valve passage. A chamber is formed on one end of the sliding sleeve with an elongate narrow passage extending thereto from the exterior of the tubular body, wherein a pressure drop of the fluid through the elongate narrow passage is adapted to move the sliding sleeve between a closed and an open position. A flow restrictor between the chamber and the interior passage of the tubular body has a pressure drop dependent only upon a flow rate of the fluid therethrough.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.