Section-balanced electric safety valve
US11035199B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2018 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Aug 13, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Provided are electric safety valves and methods of use. An electric safety valve comprises an electric actuator positioned in an interior chamber of the electric safety valve; the interior chamber comprising a dielectric fluid and being pressure and temperature compensated with a flow passage extending axially through the electric safety valve. The pressure and temperature compensation is performed via a compensating subassembly in pressure communication with the interior chamber thereby providing a section-balanced electric safety valve. The electric safety valve further comprises a protective sleeve separating the interior chamber from the flow passage. The electric safety valve further comprises at least one compression spring rod coupled to a closure member capable of restricting or preventing fluid flow through the flow passage. A method includes actuating the electric actuator; the electric actuator being magnetically coupled to the closure member such that actuation of the electric actuator pivots the closure member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.