http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110922957-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-86 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-68 |
| filingDate | 2019-11-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110922957-B |
| titleOfInvention | Twin-tail viscoelastic surfactant gel fracturing fluid, preparation method thereof and colloid relieving method |
| abstract | The invention discloses a gel fracturing fluid of a twin-tailed viscoelastic surfactant, a preparation method thereof and a colloid relieving method, wherein the gel fracturing fluid comprises the following components: mixing oleic acid, N-dimethyl-1, 3-propanediamine and a first catalyst, heating to 130-150 ℃ under the protection of nitrogen, and carrying out vacuum pumping under reduced pressure to obtain an intermediate; adding sulfonate and a first solvent into the intermediate, and reacting at 60-80 ℃ under the protection of nitrogen to obtain a crude product; vacuum drying the crude product, dissolving with ethanol, adding petroleum ether, stirring, removing petroleum ether phase, and removing ethanol to obtain product I; adding a second catalyst and a second solvent into the desired product I, slowly dropwise adding diisocyanate, reacting at the temperature of 40-60 ℃, and performing vacuum drying to obtain a product II; 5) and preparing the product II into a fracturing fluid. The gel fracturing fluid with the twin-tailed viscoelastic surfactant solves the problem of incomplete self-gel breaking of the stratum of the clean fracturing fluid when meeting oil, and the gel breaking theory is novel. |
| priorityDate | 2019-11-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.