http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1255108-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_461e1cafc2023eb58eb915338586736f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-01 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F16L1-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F16L1-123 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16L1-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-01 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16L1-12 |
| filingDate | 1986-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1989-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_686ae8ac14e4d797257c28a7d385009b |
| publicationDate | 1989-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1255108-A |
| titleOfInvention | Method for preventing thaw settlement along offshore arctic pipelines |
| abstract | ABSTRACT OF THE DISCLOSURE A method for installing a pipeline for transporting a warm fluid, such as newly-produced oil, across arctic seafloor underlain by a permafrost zone without danger of rupture of the pipeline caused by thawing in the supporting permafrost zone comprises (1) drilling a series of boreholes along the seafloor through a thawed zone of subsea soil so as to penetrate a distance into a zone of permafrost lying thereunder, (2) circulating a warm fluid through each borehole so as to cause a zone of prethawing in the permafrost zone and thereby create a slump trough on the surface of the seafloor along a path marked by the series of boreholes; and (3) installing a warm fluid bearing pipeline along the bottom of the slump trough. Usually a temperature differential between the warm fluid and the bottom of the borehole of at least 2 degrees Fahrenheit is required to assure economical prethawing of the permafrost zone. |
| priorityDate | 1985-11-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.