| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ffb7338f959400a6a869adcec4b4572e |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B47-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B47-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B34-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B34-066
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F1-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B47-06 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B47-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B47-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B47-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B34-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F1-40 |
| filingDate |
2003-08-20^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2005-03-01^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3fba55f7f8a160c75381098473336b21
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4140c54090145a63e364ec780f150048
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f73ec5c13a18e010f4fdbb929b8505ec |
| publicationDate |
2005-03-01^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6860325-B2 |
| titleOfInvention |
Downhole flow meter |
| abstract |
This invention comprises the use of a variable orifice valve as a flow controller and flow meter. Pressure measurements are taken upstream and downstream of the variable orifice valve by way of a differential pressure measurement mechanism. The differential pressure measurement mechanism may comprise two separate absolute pressure measurement devices or a single differential pressure measurement device. Flow rate through the valve is determined from the pressure drop across the valve. In wellbores having multiple zones, a variable orifice valve together with a differential pressure measurement mechanism may be deployed for each zone. The flow rate through each of the zones and at the surface can then be monitored and controlled. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10934820-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10557334-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8616282-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009260805-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8342238-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011083839-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009049889-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8464582-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007137293-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011185805-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7752906-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009050369-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8051910-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012000654-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9982519-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8316704-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7458257-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8056408-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7580797-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010089141-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009037113-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10890067-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008065362-A1 |
| priorityDate |
2000-04-11^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |