Method and apparatus for estimating down-hole process variables of gas lift system
US10370945B2 · kind B2 · utility
2Cited by
17References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2016 |
| Grant date | Aug 6, 2019 |
| Priority date | — |
| Expiry date | Oct 3, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/008
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for estimating a down-hole annulus pressure, and/or a down-hole tubing pressure, and/or a down-hole lift gas rate through a gas injection valve of gas lift system, which comprises at least one gas lift choke and at least one gas injection valve and at least one production choke. A state estimator is proposed to obtain the values of these down-hole process variables. The estimator contains a number of local estimators and an interpolation module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.