Carbon dioxide well injection method
US4593763A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 1984 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Aug 20, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/70
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for injecting carbon dioxide into a well is shown, in which carbon dioxide is supplied at the well site in a tank maintained at sufficient pressure to keep the carbon dioxide in the liquid state. As the carbon dioxide is withdrawn from the tank and transferred to the high pressure well pump, supplemental cooling is provided intermediate the tank and pump to maintain the carbon dioxide in the liquid state. The supplemental cooling is provided by passing the carbon dioxide withdrawn from the tank through a heat exchanger, the cooling effect being provided by separating a liquid-vapor stream from a predominantly liquid stream of carbon dioxide, expanding the liquid-vapor stream in the heat exchanger to cool the heat exchanger, and passing the predominantly liquid stream separately through the heat exchanger to cool the predominantly liquid stream. The expanded carbon dioxide vapor utilized in the heat exchanger is recompressed and recirculated to the tank, to maintain the tank pressure to avoid vaporization of the carbon dioxide between the tank and the high pressure pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.