Method of operating a subsea production system, a subsea tree and an electric downhole safety valve
US11920427B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Aug 17, 2020 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Aug 17, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/106
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of operating a subsea production system (1), the system comprising a subsea tree (2) connected to a subsea well (3), a production tubing (4) in the well (3), and an electrically operable electric downhole safety valve (5), wherein the method comprises, in case of malfunction in operation of the electric downhole safety valve (5), the steps of installing a hydraulically operable insert hydraulic downhole safety valve (6) within the production tubing (4); connecting the insert hydraulic downhole safety valve (6) to the fluid line (10) at a point of setting (7) in the subsea well (3); operating the insert hydraulic downhole safety valve (6) by using the fluid line (10) which extends from an input port (11) at a position outside of the subsea tree (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.