John D. Macpherson
39Patents
12h-index
49Co-inventors
81Inventor score
Filing activity: Feb 1, 1993 → Nov 25, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6732052B2 | Method and apparatus for prediction control in drilling dynamics using neural networks | Fixed Constructions | 176 | Expired |
| US9557438B2 | System and method for well data analysis | Physics | 125 | Active |
| US7172037B2 | Real-time drilling optimization based on MWD dynamic measurements | Fixed Constructions | 121 | Expired |
| US7503403B2 | Method and apparatus for enhancing directional accuracy and control using bottomhole assembly bending measurements | Fixed Constructions | 48 | Expired |
| US5321981A | Methods for analysis of drillstring vibration using torsionally induced frequency modulation | Fixed Constructions | 38 | Expired |
| US7650241B2 | Use of the dynamic downhole measurements as lithology indicators | Fixed Constructions | 32 | Active |
| US7477161B2 | Bidirectional telemetry apparatus and methods for wellbore operations | Physics | 18 | Active |
| US8474550B2 | Adaptive drilling control system | Fixed Constructions | 18 | Active |
| US9043152B2 | Realtime dogleg severity prediction | Fixed Constructions | 16 | Active |
| US8256534B2 | Adaptive drilling control system | Fixed Constructions | 16 | Active |
| US8365814B2 | Pre-verification of perforation alignment | Fixed Constructions | 14 | Active |
| US8042623B2 | Distributed sensors-controller for active vibration damping from surface | Fixed Constructions | 13 | Active |
| US6847585B2 | Method for acoustic signal transmission in a drill string | Fixed Constructions | 12 | Expired |
| US8248266B2 | Bidirectional telemetry apparatus and methods for wellbore operations | Physics | 9 | Active |
| US8788207B2 | Precise borehole geometry and BHA lateral motion based on real time caliper measurements | Fixed Constructions | 8 | Active |
| US8902695B2 | Apparatus and method for clock shift correction for measurement-while-drilling measurements | Physics | 7 | Active |
| US8775085B2 | Distributed sensors for dynamics modeling | Fixed Constructions | 5 | Active |
| US6898967B2 | Azimuthal resistivity using a non-directional device | Physics | 5 | Expired |
| US9857271B2 | Life-time management of downhole tools and components | Fixed Constructions | 4 | Active |
| US9044798B2 | Wired conduit segment and method of making same | Emerging Cross-Sectional Technologies | 4 | Active |
| US9007231B2 | Synchronization of distributed measurements in a borehole | Physics | 3 | Active |
| US8616277B2 | Real time formation pressure test and pressure integrity test | Fixed Constructions | 3 | Active |
| US7694558B2 | Downhole washout detection system and method | Fixed Constructions | 3 | Active |
| US9057235B2 | Monitoring and control systems for continuous circulating drilling operations | Fixed Constructions | 3 | Active |
| US8600679B2 | System and method to locate, monitor and quantify friction between a drillstring and a wellbore | Fixed Constructions | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.