Stephen D. Bonner
34Patents
18h-index
38Co-inventors
81Inventor score
Filing activity: May 9, 1979 → Oct 15, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5235285A | Well logging apparatus having toroidal induction antenna for measuring, while drilling, resistivity of earth formations | Physics | 158 | Expired |
| US6297639A | Method and apparatus for directional well logging with a shield having sloped slots | Physics | 118 | Expired |
| US5200705A | Dipmeter apparatus and method using transducer array having longitudinally spaced transducers | Fixed Constructions | 105 | Expired |
| US5339037A | Apparatus and method for determining the resistivity of earth formations | Physics | 99 | Expired |
| US5339036A | Logging while drilling apparatus with blade mounted electrode for determining resistivity of surrounding formation | Physics | 98 | Expired |
| US6577244B1 | Method and apparatus for downhole signal communication and measurement through a metal tubular | Emerging Cross-Sectional Technologies | 96 | Expired |
| US4292589A | Eddy current method and apparatus for inspecting ferromagnetic tubular members | Physics | 82 | Expired |
| US5359324A | Well logging apparatus for investigating earth formations | Physics | 76 | Expired |
| US6351127B1 | Shielding method and apparatus for selective attenuation of an electromagnetic energy field component | Physics | 55 | Expired |
| US6573722B2 | Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole | Physics | 51 | Expired |
| US5463320A | Apparatus and method for determining the resitivity of underground formations surrounding a borehole | Physics | 38 | Expired |
| US6680613B2 | Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole | Physics | 33 | Expired |
| US6975243B2 | Downhole tubular with openings for signal passage | Emerging Cross-Sectional Technologies | 29 | Expired |
| US6903660B2 | Inductively-coupled system for receiving a run-in tool | Emerging Cross-Sectional Technologies | 24 | Expired |
| US6710601B2 | Borehole current correction for tilted or transverse magnetic dipoles on conductive supports | Physics | 23 | Expired |
| US6380744B2 | Shielding apparatus for selective attenuation of an electromagnetic energy field component | Physics | 23 | Expired |
| US6624634B2 | Borehole current correction methods and apparatus | Physics | 22 | Expired |
| US6557794B2 | Coil shielding method for selective attenuation of an electromagnetic energy field component | Physics | 22 | Expired |
| US7091877B2 | Apparatus and methods for determining isotropic and anisotropic formation resistivity in the presence of invasion | Physics | 17 | Expired |
| US6933726B2 | Apparatus and methods for reducing borehole current effects | Physics | 16 | Expired |
| US7692428B2 | Retrievable formation resistivity tool | Emerging Cross-Sectional Technologies | 9 | Active |
| US9464482B1 | Rotary steerable drilling tool | Fixed Constructions | 8 | Active |
| US8570045B2 | Drilling system for making LWD measurements ahead of the bit | Fixed Constructions | 8 | Active |
| US7619540B2 | Apparatus and methods for determining isotropic and anisotropic formation resistivity in the presence of invasion | Physics | 6 | Active |
| US7187297B2 | Methods for sealing openings in tubulars | Emerging Cross-Sectional Technologies | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.