Assignee
NAT OILWELL NORWAY AS
NO·13 granted patents·319 citations·filing 2001–2014
Top patents by PatentIndex Score
13 records- 0195US7296591B2Valve arrangement for reciprocating machinery such as a pump and an compressorNAT OILWELL NORWAY AS·Filed 2003·Granted Nov 20, 2007·121 cites·2 claims
- 0281US6745857B2Method of drilling sub-sea oil and gas production wellsNAT OILWELL NORWAY AS·Filed 2002·Granted Jun 8, 2004·66 cites·18 claims
- 0375US9422785B2Internal blow out preventerNAT OILWELL NORWAY AS·Filed 2014·Granted Aug 23, 2016·6 cites·18 claims
- 0468US7677856B2Drill floor deviceNAT OILWELL NORWAY AS·Filed 2006·Granted Mar 16, 2010·20 cites·4 claims
- 0565US7036396B2Drill pipe spinner deviceNAT OILWELL NORWAY AS·Filed 2001·Granted May 2, 2006·36 cites·19 claims
- 0665US7004121B2Arrangement at a piston engine and method of controlling the pistonsNAT OILWELL NORWAY AS·Filed 2001·Granted Feb 28, 2006·9 cites·18 claims
- 0764US7188677B2Tensioning system for production tubing in a riser at a floating installation for hydrocarbon productionNAT OILWELL NORWAY AS·Filed 2003·Granted Mar 13, 2007·30 cites·7 claims
- 0859US7130751B2Method and device for detecting leaks in reciprocating machineryNAT OILWELL NORWAY AS·Filed 2003·Granted Oct 31, 2006·8 cites·9 claims
- 0955US7830749B2Method of filtering pump noiseNAT OILWELL NORWAY AS·Filed 2005·Granted Nov 9, 2010·4 cites·5 claims
- 1047US7176795B2Method and a device for protection of personnelNAT OILWELL NORWAY AS·Filed 2003·Granted Feb 13, 2007·7 cites·18 claims
- 1144US7373985B2Two-part telescopic tensioner for risers at a floating installation for oil and gas productionNAT OILWELL NORWAY AS·Filed 2003·Granted May 20, 2008·8 cites·5 claims
- 1238US6835026B2Riser tensioning arrangementNAT OILWELL NORWAY AS·Filed 2002·Granted Dec 28, 2004·4 cites·6 claims
- 1337US7243592B2Draining of oil leak in a hydraulic cylinderNAT OILWELL NORWAY AS·Filed 2003·Granted Jul 17, 2007·0 cites·16 claims
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →