Canister, sealing method and composition for sealing a borehole
AssigneeThe Regents of the University of California
InventorsDonald W. Brown, Arun S. Wagh
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Abstract
Method and composition for sealing a borehole. A chemically bonded phosphate ceramic sealant for sealing, stabilizing, or plugging boreholes is prepared by combining an oxide or hydroxide and a phosphate with water to form slurry. The slurry is introduced into the borehole where the seal, stabilization or plug is desired, and then allowed to set up to form the high strength, minimally porous sealant, which binds strongly to itself and to underground formations, steel and ceramics.
Claims45
A method of treating a borehole, comprising the steps of:
- (a) preparing slurry comprising oxide or hydroxide, phosphate, water, and an additive;
- (b) applying the slurry at a selected depth in a borehole;
- and
- (c) allowing the slurry to set up to form a sealant, wherein the additive decreases the porosity of the sealant.
The method of claim 5, wherein the phosphate comprises the
- formula A(H2PO4)n
- wherein A=hydrogen, alkali metal, calcium, aluminum or ammonium;
- wherein n is a number from 1 to 3.
Dependencies are inferred from the claim text.