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US 6,016,879 AGranted
Lost circulation additive, lost circulation treatment fluid made therefrom, and method of minimizing lost circulation in a subterranean formation
OwnerBoyce D. Burts, Jr.inventor
Life of this patent
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Abstract
For lost circulation treatment, a lost circulation additive including a dry mixture of water soluble crosslinkable polymer, a crosslinking agent, and a reinforcing material of fibers and/or comminuted plant materials. The method of forming a lost circulation fluid includes contacting the additive with water or an aqueous solution, with a method of conforming the formation further including the step of injecting the fluid into the wellbore.
Claims20
A method for preventing lost circulation from a borehole into a subterranean formation comprising:
- (a) providing a lost circulation additive comprising a dry mixture of water soluble crosslinkable polymer, a crosslinking agent, and a reinforcing material selected from among fibers and comminuted plant materials;
- (b) contacting the lost circulation additive with water or an aqueous solution to form a lost circulation fluid;
- and
- (c) injecting the lost circulation fluid into the borehole.
1 more element
A method for decreasing fluid loss from a borehole into a subterranean formation comprising:
- (a) providing a lost circulation additive comprising an aqueous solution of water soluble crosslinkable polymer, a crosslinking agent, and a reinforcing material selected from among fibers and comminuted plant materials, wherein the aqueous solution is formed from a dry mixture of crosslinkable polymer, crosslinking agent and reinforcing material;
- and
- (b) injecting the lost circulation fluid into the borehole.
Dependencies are inferred from the claim text.