Title:
BOREHOLE CEMENT SLURRY ADDITIVE, METHOD FOR STORING SAME, BOREHOLE CEMENT SLURRY, AND BOREHOLE CEMENTING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/217967
Kind Code:
A1
Abstract:
Provided are: a borehole cement slurry additive that is capable of suppressing the generation of free water from cement slurries in any environment, whether cold regions, mild regions, or hot regions; and a method for storing the same. The borehole cement slurry additive contains: an aqueous dispersion of silica having an average particle size of 3–200 nm as determined via dynamic light scattering; and a compound having an alcoholic hydroxyl group as a dispersion stabilizer, the compound being included in an amount of 1–30 mol per 1,000 g dispersion medium in the aqueous silica dispersion.
Inventors:
MURAKAMI SATORU (JP)
KIMATA MASAKI (JP)
OOTA ISAO (JP)
KIMATA MASAKI (JP)
OOTA ISAO (JP)
Application Number:
PCT/JP2020/015632
Publication Date:
October 29, 2020
Filing Date:
April 07, 2020
Export Citation:
Assignee:
NISSAN CHEMICAL CORP (JP)
International Classes:
C04B22/06; C01B33/18; C04B24/02; C04B28/02; E21B33/14
Foreign References:
| CN102604611A | 2012-07-25 | |||
| CN105567192A | 2016-05-11 |
Attorney, Agent or Firm:
ASAMURA PATENT OFFICE, P.C. (JP)
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