http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110950785-B
Outgoing Links
Predicate | Object |
---|---|
classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2601-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K2208-30 |
classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-68 |
classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-32 |
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-110950785-B |
titleOfInvention | Twin-tail hook type viscoelastic surfactant gel, preparation method thereof and gel removing method |
abstract | The invention discloses a twin-tailed hook type viscoelastic surfactant gel, a preparation method thereof and a gel removing method, wherein the preparation and gel breaking method comprises the following steps: 1) mixing linolenic acid, N-dimethyl-1, 3-propanediamine and a catalyst, heating to 130-150 ℃ under the protection of nitrogen, and carrying out vacuum pumping under reduced pressure to obtain an intermediate; 2) adding sulfonate and a first solvent into the intermediate, and reacting at the temperature of 60-80 ℃ under the protection of nitrogen to obtain a crude product; 3) vacuum drying the crude product, dissolving with ethanol, adding petroleum ether, stirring, removing petroleum ether phase, and removing ethanol to obtain product I; 4) adding a catalyst and a second solvent into the product I, 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 twin-tail hook type viscoelastic surfactant gel solves the problem of incomplete self-gel breaking of a clean fracturing fluid stratum 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: 43.