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US 2014/0332473 A1Published application
Multistage filtrating pre-treatment for desalination of oilfield produced water
AssigneeNirosoft Industries Ltd.
InventorsAssaf HABERMAN, Ravid LEVY
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Abstract
A method and system for treating oilfield produced water is disclosed. The method includes passing oilfield produced water through a chain of filters, first filter configured to filter particles of a size larger than 10 μm from the water, a second filter configured to filter remaining particles of a size larger than 2 μm from the water and a third filter configured to filter remaining particles of a size larger than 0.5 μm from the water and automatically cleaning at least one of the filters.
Claims17
A method of treating oilfield produced water, the method comprising:
- passing the oilfield produced water through a chain of filters, the chain comprising a first filter configured to filter particles of a size larger than 10 μm from the water, a second filter configured to filter remaining particles of a size larger than 2 μm from the water and a third filter configured to filter remaining particles of a size larger than 0.5 μm from the water;
- automatically cleaning the first filter when a first pressure drop related to the first filter is above a first threshold value;
- and
- automatically cleaning the second filter when a pressure drop related to the second filter is above a second threshold value.
1 more element
A system for treating brackish water, comprising:
- a chain of filters comprising:
- a first filter figured to filter particles larger than 10 μm;
- a second filter configured to filter particles larger than 2 μm;
- and
- a third filter configured to filter particles larger than 0.5 μm;
- a cleaning system comprising:
- a first cleaning system for cleaning the first filter;
- and
- a second cleaning system for cleaning the second filter;
- and
- a controller configured to automatically instruct:
- the first cleaning system to clean the first filter when a pressure drop on the first filter is above a first threshold value;
- and
- the second cleaning system to clean the second filter when a pressure drop on the second filter is above a second threshold value.
11 more elements
Dependencies are inferred from the claim text.