| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fd160b48bd4cc483cafd142249836250 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01V5-107 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01V5-10 |
| filingDate |
1975-09-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1977-01-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e815b0a4838982724d786ffbeb89e39a |
| publicationDate |
1977-01-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4004147-A |
| titleOfInvention |
Logging subsurface formations for porosity |
| abstract |
A borehole logging tool includes a source of fast neutrons and two thermal neutron detectors. A count rate meter is connected to each thermal neutron detector. A ratio detector provides a first signal indicative of the ratio of the count rates of the two thermal neutron detectors. A first comparator provides a signal indicative predominantly of the macroscopic absorption cross section of the formation by combining both such ratio signal and the count rate from one of the thermal neutron detectors. A second comparator provides a signal indicative predominantly of the porosity of the formation by combining both such ratio signal and such macroscopic absorption cross-section signal. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10677040-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4384205-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2490622-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10725201-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2019094409-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004178337-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10480306-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4251724-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2017167243-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4506156-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011094595-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011094595-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4266126-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4170732-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2490622-B |
| priorityDate |
1975-09-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |