| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4143daf8eb6bef17733fb260746faa49
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_76ab26596c5f45df79d217920da474e6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_85c846862cdd3a4eca16155ee8901936
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_989ecca69fc47fadd546bf9a0db59629 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01V5-045
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01V5-125
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01V5-101 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01V5-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01V5-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01V5-10 |
| filingDate |
2012-04-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2017-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_13a7986c93251d0547840623c1326aa5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_79fc24e089ca20df264d2bb57345b3d0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_302d6248001e4c62e42d0052489b1ccb |
| publicationDate |
2017-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-9835757-B2 |
| titleOfInvention |
Pulsed-neutron tool methods and systems for monitoring casing corrosion |
| abstract |
Casing condition is an important concern to oilfield operators. Systems and methods are disclosed herein for using neutron logging tools to measure casing condition, using windows in the gamma energy spectrum that are sensitive and insensitive to casing condition to obtain a ratio having a value that ranges between one extreme representative of completely absent casing and an opposite extreme representative of casing in good condition. The sensitive (“divergence”) window may be positioned at or near 7.65 MeV, the characteristic energy of gamma rays from a neutron capture event by an iron nucleus. The insensitive (“consistency”) window is preferably adjacent to the divergence window with a comparable size to the divergence window. A suitable division point between the windows may be about 6.25 MeV. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11163089-B2 |
| priorityDate |
2012-04-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |