| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f653aeb82262014077b067bc4d80067d |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-27
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C215-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-885
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-74
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-68
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-062
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-604 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-74
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-68
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C215-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-06 |
| filingDate |
2020-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2022-07-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_17c478d25d40f5142c75c4cbaa2cc8a5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_57247b4fe27733cedbc33a935efee006
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5f814ad6a4c4d1531aa1eedbe7ab6786
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_45ebab2ddaea722d90503c97a60aef0b |
| publicationDate |
2022-07-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-11390799-B2 |
| titleOfInvention |
Aqueous delayed acid system for well stimulation |
| abstract |
The disclosure relates to an aqueous acidizing fluid. In addition to an acid, the fluid contains an organophosphorus surfactant and/or an acid retarder. The organophosphorus surfactant may be an amino phosphonate or a phosphino carboxylate. The acid retarder comprises the combination of urea or a urea derivative and a bifunctional organic compound. Suitable bifunctional organic compounds contain at least one quaternary ammonium or phosphonium and at least one alcohol as well as salts of nitrogen containing heterocyclic rings. |
| priorityDate |
2019-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |