| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8205ec6ee1cd95eb60a03826535bad97 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2111-2084
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2111-00706
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K2208-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2103-60 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-467
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B14-062
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B28-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B12-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-032
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B28-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B33-14 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-467
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B28-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B33-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B14-06 |
| filingDate |
2019-05-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_87b7ccc8f03803f98295750e637366e8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_560f6c2ad14b34fd8ac8bf19ad181a05
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c9ae1cd4ed3f5a951a57f246798ce95f |
| publicationDate |
2022-01-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2022025243-A1 |
| titleOfInvention |
Silica-based additive for cementing composition, cementing composition, and cementing method |
| abstract |
An additive capable of suppressing generation of free water from a cement slurry even under a high temperature environment of 150° C. or more and a silica-based additive that suppresses, in a cement slurry for cementing in oil fields and gas oil fields, free water under high temperature and high pressure environments of 100° C. or more, the silica-based additive containing an aqueous silica sol containing nanosilica particles with a true density of 2.15 g/cm3 or more and less than 2.30 g/cm3, and a cement slurry for cementing that contains the silica-based additive. |
| priorityDate |
2018-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |