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US 12,110,450 B2Granted
Diverting agent and method of filling fracture in well using same
AssigneeMitsubishi Chemical Corporation
InventorsYasuhiro Hirano, Takahiro Saka, Ryosuke Taniguchi, Chizuko Furo
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Abstract
An object of the present invention is to provide a diverting agent that can exhibit sufficient filling properties against a fracture in a well in an excavation method using a hydraulic fracturing method, and that is excellent in solubility after a predetermined period of time has passed. The diverting agent of the present invention contains a polyvinyl alcohol-based resin having an average polymerization degree of 1000 or more.
Claims6
A diverting agent, comprising:
- a polyvinyl alcohol-based resin having an average polymerization degree of 2800 to 4000;
- wherein
- the polyvinyl alcohol-based resin has a degree of saponification in the range of from 60 mol % to 98.5 mol %, and
- the polyvinyl alcohol-based resin is a modified polyvinyl alcohol-based resin, the modified polyvinyl alcohol-based resin being a polyvinyl alcohol-based resin having a primary hydroxy group in a side chain or an ethylene-modified polyvinyl alcohol-based resin.
1 more element
Dependencies are inferred from the claim text.