Inventor · disambiguated record
Keith David Farquharson
Also filed as: FARQUHARSON KEITH D · FARQUHARSON KEITH DAVID
20 granted patents·2 pending applications·525 citations·filing 1995–2023
95Inventor score
Top patents by PatentIndex Score
22 records- 0195US5921276APiston-type check valve with diffuserSTREAM FLO IND LTD·Filed 1995·Granted Jul 13, 1999·90 cites·1 claims
- 0287US6688386B2Tubing hanger and adapter assemblySTREAM FLO IND LTD·Filed 2002·Granted Feb 10, 2004·99 cites·14 claims
- 0385US6457530B1Wellhead production pumping treeSTREAM FLO IND LTD·Filed 2001·Granted Oct 1, 2002·81 cites·3 claims
- 0480US10161218B2Ball injector for frac treeSTREAM FLO IND LTD·Filed 2016·Granted Dec 25, 2018·4 cites·28 claims
- 0578US6851478B2Y-body Christmas tree for use with coil tubingSTREAM FLO IND LTD·Filed 2003·Granted Feb 8, 2005·57 cites·12 claims
- 0677US6637509B2Wellhead stuffing box support assemblySTREAM FLO IND LTD·Filed 2002·Granted Oct 28, 2003·22 cites·3 claims
- 0776US6176466B1Composite pumping tree with integral shut-off valveSTREAM FLO IND LTD·Filed 1999·Granted Jan 23, 2001·34 cites·7 claims
- 0874US10731436B2Ball injector for frac treeSTREAM FLO IND LTD·Filed 2018·Granted Aug 4, 2020·2 cites·27 claims
- 0972US8403057B2Wellhead connectionRODGERS DOYLE W·Filed 2010·Granted Mar 26, 2013·5 cites·23 claims
- 1066US8783643B2Blowout preventer and ramsGUO TIANLE·Filed 2012·Granted Jul 22, 2014·3 cites·37 claims
- 1165US9243469B2Blowout preventer and ramsSTREAM FLO IND LTD·Filed 2014·Granted Jan 26, 2016·2 cites·40 claims
- 1265US8602458B2Wellhead pipe couplingRODGERS DOYLE W·Filed 2010·Granted Dec 10, 2013·3 cites·13 claims
- 1363US7069987B2Casing adapter tool for well servicingSTREAM FLO IND LTD·Filed 2004·Granted Jul 4, 2006·31 cites·5 claims
- 1462US11047486B2Expanding gate valveSTREAM FLO IND LTD·Filed 2018·Granted Jun 29, 2021·1 cites·38 claims
- 1556US5743332AIntegral wellhead assembly for pumping wellsSTREAM FLO IND LTD·Filed 1996·Granted Apr 28, 1998·34 cites·2 claims
- 1653US7610956B2Wellhead assembly for hydraulic pumping systemSTREAM FLO IND LTD·Filed 2007·Granted Nov 3, 2009·6 cites·17 claims
- 1749US6260817B1Hydraulic blowout preventer assembly for production wellheadSTREAM FLO IND LTD·Filed 1999·Granted Jul 17, 2001·25 cites·5 claims
- 1849US5765813AWellhead production blowout preventer ramSTREAM FLO IND LTD·Filed 1996·Granted Jun 16, 1998·26 cites·2 claims
- 1942US2025250876A1Remote launch system for activating downhole tool and related methodSTREAM FLO IND LTD·Filed 2023·Application pending·0 cites
- 2038US2024068360A1Wellhead System, Assembly and Method for Monitoring Landing of a Wellhead ComponentSTREAM FLO IND LTD·Filed 2021·Application pending·0 cites
- 2135US11879582B2Method and system for fluidly connecting fracturing manifold and fracturing treeSTREAM FLO IND LTD·Filed 2020·Granted Jan 23, 2024·0 cites·23 claims
- 2233US8066061B2Metal seal for wellheadsFARQUHARSON KEITH D·Filed 2009·Granted Nov 29, 2011·0 cites·22 claims
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