http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104388066-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K2208-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-585 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K2208-18 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-035 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-426 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-58 |
| filingDate | 2014-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-104388066-B |
| titleOfInvention | Preparation method of plugging agent for drilling fluid |
| abstract | The invention relates to a preparation method of a plugging agent for drilling fluid, which is suitable for plugging agent of large-crack and karst cave leakage stratum and belongs to the technical field of oil field chemical drilling fluid treating agents. The preparation method of the plugging agent for the drilling fluid comprises the following steps: (1) adjusting the pH value of the organic monomer aqueous solution to 8-9, adding a dispersing agent, and stirring to form a dispersed phase; adding the dispersion phase into white oil, emulsifying for 20-30 min, heating to 40-50 ℃, introducing nitrogen for 30min, stirring uniformly, then dropwise adding an initiator, continuously introducing nitrogen for 10-20 min, and standing for 5-8 h to react to form a high-molecular polymer emulsion A; (2) and (2) adding the phase transfer agent B, the cross-linking agent C and the inert bridging plugging material D into the A prepared in the step (1) in sequence, and mixing uniformly to obtain the plugging agent for the drilling fluid. The product of the invention can quickly form a viscoelastic gel plugging slug in a large-crack karst cave leakage layer, and has stronger water dilution and scouring resistance. |
| priorityDate | 2014-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 46.