Water treatment method for heavy oil production
US7967955B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 2010 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | May 17, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/17
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process for treating produced water to generate high pressure steam. Produced water from heavy oil recovery operations is treated by de-oiling the produced water to provide a de-oiled evaporator feedwater that is fed to an evaporator. The pretreated produced water stream is evaporated to produce (1) a distillate having a trace amount of residual solutes therein, and (2) evaporator blowdown containing substantially all solutes from the de-oiled produced water feed. The distillate may be directly used, or polished to remove the residual solutes therein, before being fed to a steam generator. Steam generation in a once-through steam generator, or in a packaged boiler such as a water tube boiler having a steam drum and a mud drum with water cooled combustion chamber walls, produces high pressure steam for down-hole use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.