Protective cap assembly for subsea equipment
US11220877B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Feb 2, 2021 |
| Grant date | Jan 11, 2022 |
| Priority date | — |
| Expiry date | Feb 2, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B41/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A protective cap assembly uses a heavy corrosion inhibitor fluid in the primary chamber (the central bore of the mandrel or hub) and a lightweight corrosion inhibitor fluid in the zones outside of the mandrel or hub. The protective cap assembly uses a two port hot stab receptacle and connects the first port to the primary chamber and the second port to the secondary inlet port with a secondary inlet check valve. The primary chamber is vented directly to the subsea environment. With the secondary inlet check valve added to the secondary inlet port, the second port of the protective cap assembly is connected directly to the secondary inlet check valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.