DIVERTING AGENT AND METHOD FOR CLOSING CRACK IN WELL WITH USE OF SAME

An object of the present invention is to provide a diverting agent 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 certa...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	FURO Chizuko, HIRANO Yasuhiro, TANIGUCHI Ryosuke
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON DYES EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MINING MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	An object of the present invention is to provide a diverting agent 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. The present invention relates to 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.