| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fd160b48bd4cc483cafd142249836250 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-584
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-885 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-584 |
| filingDate |
1975-11-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1977-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ca7d25df9b1a74bf32f4ff77ba27ff77
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ccbc7ed8e247c0a2fd5f1cc41e3c20ff
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_211f521c1f044162098569bbf4e34f8c |
| publicationDate |
1977-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4005749-A |
| titleOfInvention |
Oil recovery by surfactant waterflooding |
| abstract |
A surfactant waterflooding process for the recovery of oil from subterranean oil reservoirs in which a water-soluble polyalkylene oxide is employed as a sacrificial agent in order to retard adsorption of the surfactant. An aqueous pretreatment slug is injected which contains a water-soluble polyalkylene oxide sacrificial agent having a molecular weight of at least 1200. Thereafter an aqueous slug containing a surfactant exhibiting a lower molecular weight than that of the polyalkylene oxide sacrificial agent is injected. The surfactant slug may also contain a polyalkylene oxide sacrificial agent as described above. In this case, concentration of sacrificial agent in the surfactant slug normally is lower than the concentration in the pretreatment slug. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006014650-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006014649-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7332460-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104232046-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2017176454-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4147214-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110157404-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4452308-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104232046-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-3417650-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0413374-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2014022622-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9207919-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104232047-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4610302-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7468343-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110157404-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4425241-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10494908-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6499539-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2922928-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0413374-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4589489-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0090920-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0073612-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0073612-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6989355-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2014022626-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4219082-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008113884-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2952243-A1 |
| priorityDate |
1975-11-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |