| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9e183b88ffc72e64d1b805a946af58de |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-41
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B47-113
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-3504
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-3577
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-552
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N27-226
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-43 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-35
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-43
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-41
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N1-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-55 |
| filingDate |
2004-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4f7b6cfaafa9dd0baf4c71ab39f7d2f1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_53d7577df16c67fac1b0be4d50472b2b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d0015330ce14e96f87a7aad08dfdf352
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ef6b39e07e02c5a85ccf99448d84d247 |
| publicationDate |
2005-02-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2005017503-A1 |
| titleOfInvention |
Method and apparatus for a downhole refractometer and attenuated reflectance spectrometer |
| abstract |
The present invention provides a method and apparatus to distinguish between gas and liquid based on the much lower index of refraction of gas. It can also be used to monitor fluid sample clean up over time. The refractive index of a wellbore fluid is determined from the fraction, R, of light reflected off the interface between a transparent window that has a known refractive index and this fluid. Preferably, the refractive index is measured at some wavelength of light for which the fluid is not highly attenuating but is optimally attenuating. The adjacent transmission spectrometer can be used to correct the refractive index measurement for attenuation at those wavelengths, which it monitors. Also, this reflection-based refractometer design can be used as an attenuated reflectance spectrometer at highly attenuating wavelengths. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-100410647-C |
| priorityDate |
2003-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |