Downhole system having chemical injection valve assembly and method of chemical injection
US9506323B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2013 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Jan 21, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B37/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole system having a chemical injection valve assembly configured to inject at least one chemical from a chemical injection line into a downhole tubing. The chemical injection valve assembly includes a passive access control mechanism configured to reveal a first port to the tubing in a first condition and block the first port in a second condition. The passive access control mechanism including a movable piston, wherein in the first condition the piston is exposed to a first pressure source on a first side of the piston and to a second pressure source on a second side of the piston. The first pressure source is from within the tubing and the second pressure source is from outside of the chemical injection line and the tubing. Also included is a method of chemical injection in a downhole system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.