Inventor
MACDONALD DUNCAN CHARLES
US17 patents
⚠️ This page may combine multiple inventors who share the name “MACDONALD DUNCAN CHARLES”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SHELL OIL CO
7 patentsUS8939233B2Jan 27, 2015
Methods and systems for drilling
SHELL OIL CO40 citations95
US9528322B2Dec 27, 2016
Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations
SHELL OIL CO15 citations92
US8561720B2Oct 22, 2013
Methods and systems for drilling
SHELL OIL CO22 citations90
US9879490B2Jan 30, 2018
Methods and systems for drilling
SHELL OIL CO11 citations89
US9470052B2Oct 18, 2016
Methods and systems for drilling
SHELL OIL CO4 citations82
US10415365B2Sep 17, 2019
Methods and systems for drilling
SHELL OIL CO1 citations70
US9683418B2Jun 20, 2017
Methods and systems for picking up a drill bit
SHELL OIL CO0 citations50
BURNS DAVID BOOTH
5 patentsUS8177305B2May 15, 2012
Heater connections in mines and tunnels for use in treating subsurface hydrocarbon containing formations
BURNS DAVID BOOTH67 citations96
US8172335B2May 8, 2012
Electrical current flow between tunnels for use in heating subsurface hydrocarbon containing formations
BURNS DAVID BOOTH61 citations96
US8162405B2Apr 24, 2012
Using tunnels for treating subsurface hydrocarbon containing formations
BURNS DAVID BOOTH58 citations96
US8562078B2Oct 22, 2013
Hydrocarbon production from mines and tunnels used in treating subsurface hydrocarbon containing formations
BURNS DAVID BOOTH30 citations94
US8752904B2Jun 17, 2014
Heated fluid flow in mines and tunnels used in heating subsurface hydrocarbon containing formations
BURNS DAVID BOOTH3 citations72