Selectively injectable chemical additive
US12428934B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 2022 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Oct 19, 2043 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/11
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for producing fluid from a wellbore includes production tubing in the wellbore, an annulus around the tubing, and a chemical injection system for injecting chemical additive into the production tubing from the annulus. The chemical additive system includes an injection module with a valve that is selectively opened and closed by operating an actuator. When the valve is opened, the chemical additive is injected into the tubing in response to a pressure differential between the annulus and tubing. The injection module is surface-controlled and downhole conditions are monitored, so that a flow of chemical additive injection is initiated, adjusted, or suspended in real time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.