Inventor · disambiguated record
Duncan Charles Macdonald
Also filed as: MACDONALD DUNCAN · MACDONALD DUNCAN CHARLES
19 granted patents·3 pending applications·571 citations·filing 2006–2024
96Inventor score
Files withSHELL OIL CO9BURNS DAVID BOOTH5CMTE DEV LTD1COALBED INNOVATIONS PTY LTD1DAVIDSON IAN ALEXANDER1
Top patents by PatentIndex Score
22 records- 0198US8011451B2Ranging methods for developing wellbores in subsurface formationsSHELL OIL CO·Filed 2008·Granted Sep 6, 2011·100 cites·20 claims
- 0297US8177305B2Heater connections in mines and tunnels for use in treating subsurface hydrocarbon containing formationsBURNS DAVID BOOTH·Filed 2009·Granted May 15, 2012·67 cites·17 claims
- 0396US9528322B2Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formationsSHELL OIL CO·Filed 2014·Granted Dec 27, 2016·15 cites·9 claims
- 0496US8939233B2Methods and systems for drillingSHELL OIL CO·Filed 2012·Granted Jan 27, 2015·40 cites·9 claims
- 0596US8151907B2Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formationsMACDONALD DUNCAN CHARLES·Filed 2009·Granted Apr 10, 2012·77 cites·30 claims
- 0695US8562078B2Hydrocarbon production from mines and tunnels used in treating subsurface hydrocarbon containing formationsBURNS DAVID BOOTH·Filed 2009·Granted Oct 22, 2013·30 cites·19 claims
- 0795US8561720B2Methods and systems for drillingSHELL OIL CO·Filed 2012·Granted Oct 22, 2013·22 cites·13 claims
- 0895US8172335B2Electrical current flow between tunnels for use in heating subsurface hydrocarbon containing formationsBURNS DAVID BOOTH·Filed 2009·Granted May 8, 2012·61 cites·26 claims
- 0995US8162405B2Using tunnels for treating subsurface hydrocarbon containing formationsBURNS DAVID BOOTH·Filed 2009·Granted Apr 24, 2012·58 cites·17 claims
- 1092US8636323B2Mines and tunnels for use in treating subsurface hydrocarbon containing formationsPRINCE-WRIGHT ROBERT GEORGE·Filed 2009·Granted Jan 28, 2014·31 cites·25 claims
- 1190US9879490B2Methods and systems for drillingSHELL OIL CO·Filed 2012·Granted Jan 30, 2018·11 cites·8 claims
- 1286US8327681B2Wellbore manufacturing processes for in situ heat treatment processesDAVIDSON IAN ALEXANDER·Filed 2008·Granted Dec 11, 2012·29 cites·12 claims
- 1383US9129728B2Systems and methods of forming subsurface wellboresEDBURY DAVID ALSTON·Filed 2009·Granted Sep 8, 2015·15 cites·16 claims
- 1479US9470052B2Methods and systems for drillingSHELL OIL CO·Filed 2013·Granted Oct 18, 2016·4 cites·8 claims
- 1573US10415365B2Methods and systems for drillingSHELL OIL CO·Filed 2017·Granted Sep 17, 2019·1 cites·15 claims
- 1666US2025032958A1Apparatus for Separating a Gas from a Multiphase MaterialCOALBED INNOVATIONS PTY LTD·Filed 2024·Application pending·0 cites
- 1761US8739874B2Methods for heating with slots in hydrocarbon formationsOCAMPOS ERNESTO RAFAEL FONSECA·Filed 2011·Granted Jun 3, 2014·1 cites·24 claims
- 1860US8752904B2Heated fluid flow in mines and tunnels used in heating subsurface hydrocarbon containing formationsBURNS DAVID BOOTH·Filed 2009·Granted Jun 17, 2014·3 cites·20 claims
- 1958US7753141B2Coiled tubing drilling systemCMTE DEV LTD·Filed 2006·Granted Jul 13, 2010·6 cites·20 claims
- 2049US9683418B2Methods and systems for picking up a drill bitSHELL OIL CO·Filed 2012·Granted Jun 20, 2017·0 cites·9 claims
- 2139US2016230523A9Mechanized slot drillingSHELL OIL CO·Filed 2014·Application pending·0 cites
- 2236US2014291023A1Monitoring of drilling operations with flow and density measurementEDBURY S ALSTON·Filed 2011·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →