Pressure protection system for lift gas injection
US11326425B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2020 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Nov 12, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lift gas injection system that is used for introducing lift gas into a stream of production fluid includes a lift gas injection valve. A pressure protection system guards the injection valve against external overpressure by blocking communication to inside the injection valve housing when ambient pressure exceeds a set pressure. Communication is blocked by moving a valve member so that it obstructs flow through an opening in the housing. The system includes pressure actuated valve which has a platen mounted to an end of a bellows, and a valve member coupled to the platen. Surface area is reduced on the bellows side of the platen that creates a force imbalance on the platen from applied ambient pressure. At the set pressure the force imbalance moves the platen, and which pushes the valve member against the opening. A compressible pressure compensator inside the injection valve protects against internal overpressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.