Roger Griffiths
16Patents
5h-index
39Co-inventors
62Inventor score
Filing activity: Nov 21, 2003 → Jan 25, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7418865B2 | Method and apparatus for ultrasound velocity measurements in drilling fluids | Fixed Constructions | 18 | Expired |
| US7966166B2 | Method for determining a set of net present values to influence the drilling of a wellbore and increase production | Fixed Constructions | 11 | Active |
| US7432499B2 | Method and apparatus for detecting while drilling underbalanced the presence and depth of water produced from the formation | Fixed Constructions | 7 | Expired |
| US8521435B2 | Estimating sigma log beyond the measurements points | Physics | 6 | Active |
| US7342222B2 | Method and apparatus for downhole spectroscopy processing | Physics | 6 | Expired |
| US7623968B2 | Determination of porosity and fluid saturation of underground formations | Physics | 4 | Active |
| US7523002B2 | Method and system for cause-effect time lapse analysis | Fixed Constructions | 4 | Expired |
| US7669468B2 | Measuring mud flow velocity using pulsed neutrons | Fixed Constructions | 2 | Active |
| US8143570B2 | Method and apparatus for detecting while drilling underbalanced the presence and depth of water produced from the formation | Fixed Constructions | 1 | Active |
| US10422221B2 | Formation evaluation using stochastic analysis of log data | Fixed Constructions | 1 | Active |
| US9846256B2 | Interactive display of results obtained from the inversion of logging data | Physics | 1 | Active |
| US10451769B2 | Method for determining petrophysical properties from logging measurements | Physics | 1 | Active |
| US10571600B2 | Determination of formation properties using graphical methods | Physics | 1 | Active |
| US10323498B2 | Methods, computer-readable media, and systems for applying 1-dimensional (1D) processing in a non-1D formation | Fixed Constructions | 0 | Active |
| US10400594B2 | Petrophysical relationships using blind source separation techniques | Physics | 0 | Active |
| US9945977B2 | Method and apparatus for determining formation properties using non-directional electromagnetic measurements in high angle or horizontal wells | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.