Dan M. Arnold
53Patents
16h-index
19Co-inventors
81Inventor score
Filing activity: Jul 17, 1974 → Dec 29, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4297575A | Simultaneous gamma ray measurement of formation bulk density and casing thickness | Physics | 49 | Expired |
| US4209695A | Detection of impurities in fluid flowing in refinery pipeline or oil production operations using nuclear techniques | Physics | 39 | Expired |
| US4144754A | Multiphase fluid flow meter | Physics | 33 | Expired |
| US4585939A | Multi-function natural gamma ray logging system | Physics | 31 | Expired |
| US4424444A | Method for simultaneous measurement of borehole and formation neutron lifetimes | Physics | 31 | Expired |
| US5810485A | Auxiliary bearing system | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US4228350A | Method and apparatus for measuring underground fluid flow characteristics | Physics | 30 | Expired |
| US5077471A | Method and apparatus for measuring horizontal fluid flow in downhole formations using injected radioactive tracer monitoring | Fixed Constructions | 28 | Expired |
| US4352288A | Measurement of salt content in petroleum flow lines | Physics | 23 | Expired |
| US4365154A | Detection of impurities in a fluid containing free gas using nuclear techniques | Physics | 23 | Expired |
| US4861986A | Tracer injection method | Physics | 20 | Expired |
| US4501964A | Borehole compensated oxygen activation nuclear well logging | Physics | 20 | Expired |
| US4233508A | Water injection profiling | Physics | 19 | Expired |
| US4137452A | Method of measuring horizontal fluid flow in cased off subsurface formations with manganese compensation | Physics | 19 | Expired |
| US5642944A | Auxiliary bearing system | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US4071755A | Method for in situ evaluation of the source rock potential of earth formations | Physics | 17 | Expired |
| US4529877A | Borehole compensated density logs corrected for naturally occurring gamma rays | Physics | 16 | Expired |
| US4169979A | Method and apparatus for measuring azimuth and speed of horizontal fluid flow by a borehole | Fixed Constructions | 15 | Expired |
| US4436996A | Borehole compensated KUT log | Physics | 15 | Expired |
| US4032780A | Behind casing water flow detection using continuous oxygen activation | Physics | 14 | Expired |
| US5021652A | Directional gamma ray spectrometer | Physics | 14 | Expired |
| US5461909A | Oxygen activation method for quantitative water flow measurements within and behind well bore casing | Physics | 14 | Expired |
| US4035640A | Behind casing water flow detection using pulsed neutron oxygen activation | Physics | 13 | Expired |
| US4282760A | Multiphase fluid flow meter (D#76,244) | Physics | 13 | Expired |
| US4574193A | Method for logging fluid flow rate, water fraction, and/or salinity of water flowing into a well | Fixed Constructions | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.