Dennis Roessler
39Patents
9h-index
37Co-inventors
75Inventor score
Filing activity: Sep 20, 1989 → May 12, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5510582A | Acoustic attenuator, well logging apparatus and method of well logging | Emerging Cross-Sectional Technologies | 71 | Expired |
| US5644186A | Acoustic Transducer for LWD tool | Physics | 51 | Expired |
| US5606124A | Apparatus and method for determining the gravitational orientation of a well logging instrument | Fixed Constructions | 38 | Expired |
| US6752205B2 | Inflatable packer with prestressed bladder | Fixed Constructions | 23 | Expired |
| US8542353B2 | Refractive index sensor for fluid analysis | Physics | 15 | Active |
| US10641068B2 | Perforating gun system and method | Fixed Constructions | 13 | Active |
| US5331607A | Sweep frequency vibrator | Physics | 12 | Expired |
| US5313025A | Displacement amplified acoustic transmitter | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7805988B2 | Borehole tester apparatus and methods using dual flow lines | Fixed Constructions | 11 | Active |
| US4928764A | Wireline tool cable head overload apparatus | Fixed Constructions | 7 | Expired |
| US9689232B2 | Reverse flow actuation apparatus and method | Fixed Constructions | 6 | Active |
| US8436296B2 | Filter wheel assembly for downhole spectroscopy | Physics | 4 | Active |
| US9617826B2 | Reverse flow catch-and-engage tool and method | Fixed Constructions | 4 | Active |
| US10851613B2 | Two-part restriction element for large-bore downhole isolation tool and method | Fixed Constructions | 3 | Active |
| US5024272A | Drill pipe downhole unthreading apparatus | Fixed Constructions | 3 | Expired |
| US10689948B2 | Electronic time delay apparatus and method | Fixed Constructions | 3 | Active |
| US8806932B2 | Cylindrical shaped snorkel interface on evaluation probe | Fixed Constructions | 3 | Active |
| US10156126B2 | Degradable material time delay system and method | Fixed Constructions | 3 | Active |
| US10208570B2 | Degradable material time delay system and method | Fixed Constructions | 3 | Active |
| US7807962B2 | Borehole tester apparatus and methods for using nuclear electromagnetic radiation to determine fluid properties | Physics | 2 | Active |
| US10253597B2 | Degradable material time delay system and method | Fixed Constructions | 2 | Active |
| US7805999B2 | Apparatus and methods for measuring pressure using a formation tester | Physics | 2 | Active |
| US11384625B2 | Device and method for angularly orientating wellbore perforating guns | Fixed Constructions | 1 | Active |
| US10584557B2 | Debris preventing downhole air lock device and method | Fixed Constructions | 1 | Active |
| US11333003B2 | Opening a casing with a hydraulic-powered setting tool | Fixed Constructions | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.