Title:
油井セメント用添加剤及び該油井セメント用添加剤を用いたセメントスラリー
Document Type and Number:
Japanese Patent JP7303786
Kind Code:
B2
Abstract:
Provided is an additive for oil well cement, containing a vinyl alcohol polymer, the additive having good fluid loss reducing performance. The additive for oil well cement is a saponified product of a copolymer of a vinyl ester monomer and a multifunctional monomer, and has a degree of saponification of 70 to 95 mol% and a viscosity-average degree of polymerization of 1000 to 10000.
Inventors:
Akihiro Yamashita
Kosuke Watanabe
Kosuke Watanabe
Application Number:
JP2020141915A
Publication Date:
July 05, 2023
Filing Date:
August 25, 2020
Export Citation:
Assignee:
Denka Company Limited
International Classes:
C04B24/26; C04B28/02; C08F8/12; C08F218/08; C09K8/12; C09K8/44; E21B43/00
Foreign References:
| WO2017195855A1 |
Attorney, Agent or Firm:
Axis International Patent Attorney Corporation