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US 12,410,363 B2Granted
Diverting agent and method of filling fracture in well using same
AssigneeMitsubishi Chemical Corporation
InventorsYasuhiro Hirano, Ryosuke Taniguchi, Chizuko Furo
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Abstract
A diverting agent is provided which does not completely dissolve in water and seawater in an ultra-low temperature to low temperature range (5° C. to 30° C.) for a certain period of time (about 5 minutes to 3 hours), and is quickly dissolved and removed after a certain period of time in an excavation method using a hydraulic fracturing method. Also provided is a diverting agent containing a polyvinyl alcohol-based resin having 2.3 mol % to 15 mol % of a hydrophilic modifying group in a molecular structure thereof.
Claims9
A diverting agent comprising:
- a polyvinyl alcohol-based resin having 2.3 mol % to 15 mol % of a primary hydroxy group in the side chain thereof,
- wherein a content of the polyvinyl alcohol-based resin is 50 mass % to 100 mass % with respect to the entire diverting agent.
Dependencies are inferred from the claim text.