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US 2015/0021027 A1Published application
Wellbore fluid
AssigneeM-I Drilling Fluids UK Limited
InventorJohn W. Chapman
Life of this patent
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Abstract
The present invention provides a wellbore fluid, such as a drilling, completion or workover fluid, said wellbore fluid comprising a glucomannan additive. Further provided is a method of forming a gel plug from the wellbore fluid, a method of modifying the properties of a wellbore fluid, a method of drilling a subterranean hole with such a fluid and the use of glucomannan in wellbore fluids.
Claims27
A wellbore fluid comprising:
- water;
- a glucomannan additive;
- and
- at least one other component selected from the group consisting of a rheology modifier, fluid loss control agent, inorganic or organic salt, dispersant, shale stabilizer or inhibitor and weighting agent.
1 more element
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A method comprising:
- providing a wellbore fluid into a wellbore, wherein the wellbore fluid comprises:
- water;
- a glucomannan additive;
- and
- at least one other component selected from the group consisting of a rheology modifier, fluid loss control agent, inorganic or organic salt, dispersant, shale stabilizer or inhibitor and weighting agent;
- and
- deacetylating the glucomannan additive in the wellbore fluid to form a gel plug.
4 more elements
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A method comprising:
- circulating a wellbore fluid in a wellbore, wherein the wellbore fluid comprises:
- water;
- a glucomannan additive;
- and
- at least one other component selected from the group consisting of a rheology modifier, fluid loss control agent, inorganic or organic salt, dispersant, shale stabilizer or inhibitor and weighting agent.
2 more elements
Dependencies are inferred from the claim text.