Process for pumping a gas/liquid mixture in an oil extraction well and device for implementing the process
US5173022A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1990 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Oct 1, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S415/903
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to a process for pumping a two-phase gas/liquid mixture in an extraction well (11) whose initial gas percentage is greater than approximately 40% by volume, characterized in that it consists: PA1 in reducing the percentage of free gas to below 40% by the use of at least a first centrifugal separating module (3, 4); PA1 in cooling the drive motor by means of an annular flow of the mixture emerging from the first separating module (3, 4) around the motor (9), the proportion of gas in the said mixture having been brought down to below 40% in order to increase its heat capacity and its speed of passage around the motor; PA1 in reducing to below approximately 10% the percentage of gas by volume by the use of at least a second centrifugal separating module (14); PA1 in pumping the fluid thus obtained by means of a centrifugal pump (16) driven by the motor (9).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.