http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113717316-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-035 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F212-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F226-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-035 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F212-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F230-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F228-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F226-02 |
| filingDate | 2021-08-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-113717316-B |
| titleOfInvention | High-temperature-resistant star polymer fluid loss additive, preparation method thereof and water-based drilling fluid |
| abstract | The invention discloses a high-temperature-resistant star polymer fluid loss additive, a preparation method thereof and a water-based drilling fluid, and relates to the technical field of oilfield chemistry. The high-temperature resistant star polymer fluid loss additive comprises at least one star polymer shown in structural formulas (I), (II), (III), (IV), (V) and (VI). The star polymer contains abundant anionic and cationic functional groups, shows a reverse polyelectrolyte effect, has excellent salt pollution resistance, and enhances the stability at high temperature due to the mutual influence of groups on a branched chain structure; and the steric hindrance effect exists between the branched chains, so that the stability of the polymer is further improved. At high temperature, the secondary structure can still meet the requirement, the relative molecular quality is stable, and meanwhile, the effective amount of radicals on a molecular chain is ensured due to secondary radicals generated by molecular breakage. The high-temperature resistant star polymer fluid loss additive provided by the invention can resist temperature up to 260 ℃, has a fluid loss reduction rate of more than 70% and can resist 30% of NaCl pollution. |
| priorityDate | 2021-08-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 83.