http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112980413-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-524 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-524 |
| filingDate | 2021-03-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112980413-B |
| titleOfInvention | A temperature/pH-responsive activator for filter cake removal in cementing |
| abstract | The invention discloses a temperature/pH responsive activator for filter cake removal liquid in cementing. The activator is obtained by reacting temperature/pH responsive iron-based microcapsules and solution C at 60-70 DEG C under the protection of inert gas The solution C contains the following components in parts by weight: 0.1 to 1 part of a metal salt, 1 to 10 parts of a chelating agent and 100 parts of water; wherein, the metal salt is selected from cobalt chloride, cobalt chloride hexahydrate Any one or two or more of hydrate, manganese chloride and manganese chloride tetrahydrate. The temperature/pH responsive activator for the filter cake removal fluid in cementing of the present invention is used as a key admixture of the oxidation type pre-fluid, which can adapt to the characteristics and requirements of the cementing operation, and release the activating component under a certain temperature and pH in the well. Improve the cleaning effect of the cleaning solution on the filter cake. |
| priorityDate | 2021-03-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 78.