Brian Clark
117Patents
34h-index
116Co-inventors
93Inventor score
Filing activity: Apr 16, 1982 → Aug 23, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4899112A | Well logging apparatus and method for determining formation resistivity at a shallow and a deep depth | Physics | 159 | Expired |
| US5235285A | Well logging apparatus having toroidal induction antenna for measuring, while drilling, resistivity of earth formations | Physics | 158 | Expired |
| US4536714A | Shields for antennas of borehole logging devices | Electricity | 119 | Expired |
| US6297639A | Method and apparatus for directional well logging with a shield having sloped slots | Physics | 118 | Expired |
| US5594343A | Well logging apparatus and method with borehole compensation including multiple transmitting antennas asymmetrically disposed about a pair of receiving antennas | Physics | 109 | Expired |
| US4949045A | Well logging apparatus having a cylindrical housing with antennas formed in recesses and covered with a waterproof rubber layer | Physics | 105 | Expired |
| US5200705A | Dipmeter apparatus and method using transducer array having longitudinally spaced transducers | Fixed Constructions | 105 | Expired |
| US4766384A | Well logging apparatus for determining dip, azimuth, and invaded zone conductivity | Physics | 102 | Expired |
| US5339036A | Logging while drilling apparatus with blade mounted electrode for determining resistivity of surrounding formation | Physics | 98 | Expired |
| US6308137A | Method and apparatus for communication with a downhole tool | Fixed Constructions | 98 | Expired |
| US6577244B1 | Method and apparatus for downhole signal communication and measurement through a metal tubular | Emerging Cross-Sectional Technologies | 96 | Expired |
| US7909096B2 | Method and apparatus of reservoir stimulation while running casing | Fixed Constructions | 89 | Active |
| US6727827B1 | Measurement while drilling electromagnetic telemetry system using a fixed downhole receiver | Fixed Constructions | 87 | Expired |
| US7913773B2 | Bidirectional drill string telemetry for measuring and drilling control | Physics | 82 | Active |
| US5359324A | Well logging apparatus for investigating earth formations | Physics | 76 | Expired |
| US4968940A | Well logging apparatus and method using two spaced apart transmitters with two receivers located between the transmitters | Physics | 75 | Expired |
| US6614229B1 | System and method for monitoring a reservoir and placing a borehole using a modified tubular | Fixed Constructions | 70 | Expired |
| US4553097A | Well logging apparatus and method using transverse magnetic mode | Physics | 60 | Expired |
| US6351127B1 | Shielding method and apparatus for selective attenuation of an electromagnetic energy field component | Physics | 55 | Expired |
| US8004421B2 | Wellbore telemetry and noise cancellation systems and method for the same | Physics | 54 | Active |
| US7096961B2 | Method and apparatus for performing diagnostics in a wellbore operation | Fixed Constructions | 52 | Expired |
| US6573722B2 | Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole | Physics | 51 | Expired |
| US4704581A | Electromagnetic logging apparatus using vertical magnetic dipole slot antennas | Physics | 51 | Expired |
| USRE32913E | Shields for antennas of borehole logging devices | General | 46 | Expired |
| US6863127B2 | System and method for making an opening in a subsurface tubular for reservoir monitoring | Fixed Constructions | 46 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.