http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-1965342-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b3853d6ee291379ca9a3a346d61c9b4f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B36-003 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B36-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F16L59-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B33-13 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B36-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16L59-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B33-13 |
| filingDate | 1969-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_680bb0a02ea9b027b500be4e2cf7a402 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_11dde57f3f598ee0ee922a3667b4b511 |
| publicationDate | 1971-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-1965342-A1 |
| titleOfInvention | Method and device for thermal insulation of a deep borehole |
| abstract | Steam is injected through a stainless steel string into the formation, to lower the viscosity of the oil and thus promote outward production. At the same time a solution of silicate is piped into the annular space between the string and the perforated hole casing so that the steam in the string heats and boils off the water from this silica solution, a thin even skin of foam forms on the outside of the string, thus conserving the heat and so the efficiency of the injected steam. Centering devices should be used to keep the string out of contact with the hole wall. Silica solution should have density 22-50 Be at 20 degrees C., with ratio between 1.3 : 1 and 1-5.0 : 1 in terms of silica to alkali metal oxide. |
| priorityDate | 1969-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.