| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_90e7136bc810b844502b21de846a8a71 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-90 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-90 |
| filingDate |
1979-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1980-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f315f6fa2e10673140a1b391e48c04d9 |
| publicationDate |
1980-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4219082-A |
| titleOfInvention |
Lignosulfonate-formaldehyde condensation products as additives in oil recovery processes involving chemical recovery agents |
| abstract |
A process for producing petroleum from subterranean formations is disclosed wherein production from the formation is obtained by driving a fluid from an injection well to a production well. The process involves injecting via the injection well into the formation an aqueous solution of lignosulfonate-formaldehyde condensation products as a sacrificial agent to inhibit the deposition of surfactant and/or polymer on the reservoir matrix. The process may best be carried out by injecting the lignosulfonate-formaldehyde condensation products into the formation through the injection well mixed with either a polymer, a surfactant solution and/or a micellar dispersion. This mixture would then be followed by a drive fluid such as water to push the chemicals to the production well. |
| isCitedBy |
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http://rdf.ncbi.nlm.nih.gov/pubchem/patent/AU-2015229736-B2 |
| priorityDate |
1979-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |