Inventor
JOHNSON ASHLEY BERNARD
GB64 patents
⚠️ This page may combine multiple inventors who share the name “JOHNSON ASHLEY BERNARD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SCHLUMBERGER TECHNOLOGY CORP
40 patentsUS7946341B2May 24, 2011
Systems and methods for distributed interferometric acoustic monitoring
SCHLUMBERGER TECHNOLOGY CORP148 citations98
US5944123AAug 31, 1999
Hydraulic jetting system
SCHLUMBERGER TECHNOLOGY CORP110 citations98
US6062311AMay 16, 2000
Jetting tool for well cleaning
SCHLUMBERGER TECHNOLOGY CORP68 citations96
US6993432B2Jan 31, 2006
System and method for wellbore communication
SCHLUMBERGER TECHNOLOGY CORP87 citations95
US10458224B2Oct 29, 2019
Monitoring of equipment associated with a borehole/conduit
SCHLUMBERGER TECHNOLOGY CORP21 citations92
US7971661B2Jul 5, 2011
Motor bit system
SCHLUMBERGER TECHNOLOGY CORP19 citations92
US7845430B2Dec 7, 2010
Compliantly coupled cutting system
SCHLUMBERGER TECHNOLOGY CORP23 citations92
US7784339B2Aug 31, 2010
Perforation logging tool and method
SCHLUMBERGER TECHNOLOGY CORP27 citations92
US6032741AMar 7, 2000
Abrasives for well cleaning
SCHLUMBERGER TECHNOLOGY CORP20 citations92
US8347958B2Jan 8, 2013
Systems and methods for distributed interferometric acoustic monitoring
SCHLUMBERGER TECHNOLOGY CORP17 citations91
US12449163B2Oct 21, 2025
Boosting well performance in geothermal systems
SCHLUMBERGER TECHNOLOGY CORP2 citations75
US10533386B2Jan 14, 2020
Discharge coefficient determination of a managed pressure drilling choke/valve
SCHLUMBERGER TECHNOLOGY CORP6 citations72
US12435705B2Oct 7, 2025
Intervention combinations to boost well performance in geothermal systems
SCHLUMBERGER TECHNOLOGY CORP2 citations70
US11732571B2Aug 22, 2023
Downhole tool with sensor set(s) sensitive to circumferential, axial, or radial forces
SCHLUMBERGER TECHNOLOGY CORP2 citations70
US10233698B2Mar 19, 2019
Instrumented rotary tools with attached cutters
SCHLUMBERGER TECHNOLOGY CORP5 citations70
US9677337B2Jun 13, 2017
Testing while fracturing while drilling
SCHLUMBERGER TECHNOLOGY CORP2 citations70
US11118406B2Sep 14, 2021
Drilling systems and methods
SCHLUMBERGER TECHNOLOGY CORP2 citations69
US10077647B2Sep 18, 2018
Control of a managed pressure drilling system
SCHLUMBERGER TECHNOLOGY CORP4 citations65
US12000282B1Jun 4, 2024
Systems and methods for microwave-based drilling employing coiled tubing waveguide
SCHLUMBERGER TECHNOLOGY CORP0 citations62
US6058771AMay 9, 2000
Determination of fluid influx or efflux
SCHLUMBERGER TECHNOLOGY CORP6 citations61
US12473826B1Nov 18, 2025
Instrumented movable drill bit cutter
SCHLUMBERGER TECHNOLOGY CORP0 citations60
US12286839B2Apr 29, 2025
Devices and systems for cutting element assemblies
SCHLUMBERGER TECHNOLOGY CORP1 citations60
US11814909B2Nov 14, 2023
Anti-whirl stabilization tools
SCHLUMBERGER TECHNOLOGY CORP0 citations60
US11512540B2Nov 29, 2022
Methods for mitigating whirl
SCHLUMBERGER TECHNOLOGY CORP0 citations60
US12473816B2Nov 18, 2025
Mitigation of severe dynamic vibrations via stick slip promotion
SCHLUMBERGER TECHNOLOGY CORP0 citations59
US11668184B2Jun 6, 2023
Instrumented rotary tool with compliant connecting portions
SCHLUMBERGER TECHNOLOGY CORP0 citations59
US11434748B2Sep 6, 2022
Instrumented rotary tool with sensor in cavity
SCHLUMBERGER TECHNOLOGY CORP0 citations59
US10704332B2Jul 7, 2020
Downhole rotary cutting tool
SCHLUMBERGER TECHNOLOGY CORP1 citations56
US10273793B2Apr 30, 2019
Management and control of a sealing element of a rotating control device
SCHLUMBERGER TECHNOLOGY CORP1 citations56
US10920584B2Feb 16, 2021
Detection of influx and loss of circulation
SCHLUMBERGER TECHNOLOGY CORP1 citations55
US12111273B2Oct 8, 2024
Systems and methods for determining the mineralogy of drill solids
SCHLUMBERGER TECHNOLOGY CORP0 citations53
US12571296B2Mar 10, 2026
Frequency analysis of time-series vibrational data
SCHLUMBERGER TECHNOLOGY CORP0 citations52
US12345198B1Jul 1, 2025
Thermal impact of gas storage
SCHLUMBERGER TECHNOLOGY CORP0 citations51
US11822039B2Nov 21, 2023
Formation evaluation at drill bit
SCHLUMBERGER TECHNOLOGY CORP0 citations51
US10584538B2Mar 10, 2020
Reamer
SCHLUMBERGER TECHNOLOGY CORP0 citations51
US10519722B2Dec 31, 2019
Reamer
SCHLUMBERGER TECHNOLOGY CORP0 citations51
US11021912B2Jun 1, 2021
Rotary steering systems and methods
SCHLUMBERGER TECHNOLOGY CORP0 citations50
US12523396B2Jan 13, 2026
Closed well loop for geothermal systems
SCHLUMBERGER TECHNOLOGY CORP0 citations49
US12577859B2Mar 17, 2026
Interventions to boost well performance in geothermal systems
SCHLUMBERGER TECHNOLOGY CORP0 citations47
US10119347B2Nov 6, 2018
Aligning borehole drilling equipment
SCHLUMBERGER TECHNOLOGY CORP1 citations45
JOHNSON ASHLEY BERNARD
5 patentsUS8763726B2Jul 1, 2014
Drill bit gauge pad control
JOHNSON ASHLEY BERNARD32 citations93
US8746368B2Jun 10, 2014
Compliantly coupled gauge pad system
JOHNSON ASHLEY BERNARD12 citations83
US8066085B2Nov 29, 2011
Stochastic bit noise control
JOHNSON ASHLEY BERNARD10 citations83
US9581475B2Feb 28, 2017
Multiphase flowmeter
JOHNSON ASHLEY BERNARD7 citations82
US8550185B2Oct 8, 2013
Stochastic bit noise
JOHNSON ASHLEY BERNARD2 citations62
SHEPPARD MICHAEL CHARLES
3 patentsUS8534380B2Sep 17, 2013
System and method for directional drilling a borehole with a rotary drilling system
SHEPPARD MICHAEL CHARLES22 citations91
US8720605B2May 13, 2014
System for directionally drilling a borehole with a rotary drilling system
SHEPPARD MICHAEL CHARLES2 citations61
US8720604B2May 13, 2014
Method and system for steering a directional drilling system
SHEPPARD MICHAEL CHARLES3 citations61
HARTOG ARTHUR H
1 patentJEFFRYES BENJAMIN P
1 patentShowing the top 50 of 64 patents by PatentIndex Score.