http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3913677-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_91441e2cef8f72b235f32bd5c297f6a9 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-607 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-72 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-17 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-72 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-17 |
| filingDate | 1973-08-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1975-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_55e57c59358f11846f1e241a83cb1f03 |
| publicationDate | 1975-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3913677-A |
| titleOfInvention | Treatment of oil well strata |
| abstract | A method of treating oil-bearing strata in oil wells. Water is treated by absorbing in it sulfur dioxide in excess of the stoichiometric amount needed to remove any elementary oxygen from said water preferably using iron as a catalyst, and also to remove all carbonates and bicarbonates therefrom, and thereafter without exposing the treated water to oxygen or air injecting the treated water into the strata. In some strata, in which calcium compounds are not present, an opening up of clays to flow can be provided by adding to the water a calcium compound which is reactive with sulfurous acid to form calcium sulfite or calcium bisulfite (preferably the latter), whereby to provide a calcium ion for exchange with the sodium ion in the clay. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9406730-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5221312-A |
| priorityDate | 1973-08-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 45.