Oilfield composition
AssigneeNouryon Chemicals International B.V.
InventorsZahra TALEAT, Leif Olof KARLSON, Fred Erik PRINS
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Abstract
An oilfield composition includes an O/W emulsion including crude oil and water; and a particular cellulose ether. A method of separating the crude oil and the water includes the steps of a) providing the O/W emulsion; b) providing the particular cellulose ether; c) combining the cellulose ether and the O/W emulsion, wherein the cellulose ether is present in an amount of from about 1 to about 20 parts by weight per one million parts by weight of the combination of the cellulose ether and the O/W emulsion; and subsequently, and d) separating the crude oil from the water.
Claims20
An oilfield composition comprising:
- an O/W emulsion comprising crude oil and water;
- and
- a cellulose ether that has the structure:
- wherein each R1, R2 and R3 is independently H, a carboxymethyl group, a C1-C18 alkyl group, or a C2-C3 hydroxy alkyl group, so long as not all R1, R2 and R3 are H;
- wherein n is from about 800 to about 10,000;
- and
- wherein the cellulose ether is present in an amount of from about 1 to about 20 parts by weight per one million parts by weight of the composition.
A method of separating crude oil and water, said method comprising the steps of:
- a) providing an O/W emulsion comprising crude oil and water;
- b) providing cellulose ether of any preceding claim;
- c) combining the cellulose ether and the O/W emulsion, wherein the cellulose ether is present in an amount of from about 1 to about 20 parts by weight per one million parts by weight of the combination of the cellulose ether and the O/W emulsion;
- and subsequently
- d) separating the crude oil from the water.
Dependencies are inferred from the claim text.