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A platform for research: civil engineering, architecture and urbanism
ADDITIVE FOR OIL WELL CEMENT, AND CEMENT COMPOSITION AND CEMENT SLURRY BOTH INCLUDING SAID ADDITIVE FOR OIL WELL CEMENT
Provided is a PVA-containing additive for oil well cement superior in fluid loss-reducing property. Specifically, provided is an additive for oil well cement, the additive containing polyvinyl alcohol having a saponification value of 75 to 85 mol % and a viscosity-average polymerization degree of 2,800 to 4,500. Also provided are a cement composition containing the additive for oil well cement in an amount of 0.01 to 30% bwoc and a cement slurry containing the additive for oil well cement in an amount of 0.01 to 30% bwoc.
ADDITIVE FOR OIL WELL CEMENT, AND CEMENT COMPOSITION AND CEMENT SLURRY BOTH INCLUDING SAID ADDITIVE FOR OIL WELL CEMENT
Provided is a PVA-containing additive for oil well cement superior in fluid loss-reducing property. Specifically, provided is an additive for oil well cement, the additive containing polyvinyl alcohol having a saponification value of 75 to 85 mol % and a viscosity-average polymerization degree of 2,800 to 4,500. Also provided are a cement composition containing the additive for oil well cement in an amount of 0.01 to 30% bwoc and a cement slurry containing the additive for oil well cement in an amount of 0.01 to 30% bwoc.
ADDITIVE FOR OIL WELL CEMENT, AND CEMENT COMPOSITION AND CEMENT SLURRY BOTH INCLUDING SAID ADDITIVE FOR OIL WELL CEMENT
TAMAI HIROSHI (author)
2020-06-25
Patent
Electronic Resource
English
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ADDITIVE FOR OIL WELL CEMENT AND CEMENT SLURRY USING SAID ADDITIVE FOR OIL WELL CEMENT
| European Patent Office | 2020