Inventor · disambiguated record
Kwong-Onn Chan
Also filed as: CHAN KWONG O · CHAN KWONG-ONN · CHAN KWONG-ONN C
11 granted patents·2 pending applications·138 citations·filing 2002–2017
90Inventor score
Technology areasE21B
Top patents by PatentIndex Score
13 records- 0183US9103183B2Method and apparatus for launching multiple balls in a wellHE HENRY X·Filed 2011·Granted Aug 11, 2015·17 cites·15 claims
- 0271US7069995B2Remedial system to flush contaminants from tubing stringVETCO GRAY INC·Filed 2004·Granted Jul 4, 2006·43 cites·9 claims
- 0370US7823634B2Wellhead isolation sleeve assemblyVETCO GRAY INC·Filed 2007·Granted Nov 2, 2010·12 cites·7 claims
- 0463US8141641B2Backup safety flow control system for concentric drill stringCHAN KWONG O·Filed 2010·Granted Mar 27, 2012·3 cites·4 claims
- 0559US7647989B2Backup safety flow control system for concentric drill stringVETCO GRAY INC·Filed 2008·Granted Jan 19, 2010·5 cites·14 claims
- 0654US7090033B2Drill string shutoff valveVETCO GRAY INC·Filed 2003·Granted Aug 15, 2006·19 cites·22 claims
- 0753US8919453B2Scalloped landing ringHE HENRY·Filed 2011·Granted Dec 30, 2014·2 cites·18 claims
- 0849US6918452B2Drill string shutoff valveVETCO GRAY INC·Filed 2002·Granted Jul 19, 2005·14 cites·20 claims
- 0948US7017682B2Drill string shutoff valveVETCO GRAY INC·Filed 2003·Granted Mar 28, 2006·14 cites·23 claims
- 1044US6736208B2Wellhead production pumping tree with access portSTREAM FLO IND LTD·Filed 2002·Granted May 18, 2004·9 cites·11 claims
- 1135US10605032B2Electrically insulated tubing hanger systemGE OIL & GAS PRESSURE CONTROL LP·Filed 2017·Granted Mar 31, 2020·0 cites·18 claims
- 1235US2007062693A1System, method, and apparatus for degassing tool for coal bed methane gas wellsVETCO GRAY INC·Filed 2005·Application pending·0 cites
- 1331US2016208570A1Flowline and Injection Tee for Frac SystemGE OIL & GAS PRESSURE CONTROL LP·Filed 2016·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →