John Hardin
35Patents
12h-index
82Co-inventors
84Inventor score
Filing activity: Jul 14, 1999 → Feb 24, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6244361A | Steerable rotary drilling device and directional drilling method | Mechanical Engineering; Lighting; Heating | 171 | Expired |
| US6581699B1 | Steerable drilling system and method | Fixed Constructions | 112 | Expired |
| US7225879B2 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell | Fixed Constructions | 91 | Expired |
| US7571777B2 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell | Fixed Constructions | 47 | Active |
| US8011446B2 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell | Fixed Constructions | 37 | Active |
| US7147066B2 | Steerable drilling system and method | Fixed Constructions | 35 | Expired |
| US6948572B2 | Command method for a steerable rotary drilling device | Fixed Constructions | 32 | Expired |
| US7204309B2 | MWD formation tester | Fixed Constructions | 30 | Expired |
| US7966875B2 | Methods and apparatus for measuring formation properties | Fixed Constructions | 29 | Active |
| US7336199B2 | Inductive coupling system | Fixed Constructions | 17 | Active |
| US6340063B1 | Steerable rotary directional drilling method | Fixed Constructions | 17 | Expired |
| US7243537B2 | Methods for measuring a formation supercharge pressure | Fixed Constructions | 16 | Expired |
| US7603897B2 | Downhole probe assembly | Physics | 12 | Expired |
| US7395879B2 | MWD formation tester | Fixed Constructions | 9 | Active |
| US6899174B2 | Floating instrument insert for a tool | Fixed Constructions | 8 | Expired |
| US7621343B2 | Steerable drilling system and method | Fixed Constructions | 8 | Active |
| US6640909B2 | Steerable rotary drilling device | Fixed Constructions | 7 | Expired |
| US9453380B2 | Remote hydraulic control of downhole tools | Fixed Constructions | 7 | Active |
| US7416026B2 | Apparatus for changing flowbore fluid temperature | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7320363B2 | Energized slip ring assembly | Fixed Constructions | 5 | Expired |
| US8807246B2 | Downhole tool and control module | Fixed Constructions | 3 | Active |
| US8604632B2 | Systems and methods of harvesting energy in a wellbore | Electricity | 2 | Active |
| US9518450B2 | Reamer and bit interaction model system and method | Physics | 1 | Active |
| US11035174B2 | Strategic flexible section for a rotary steerable system | Fixed Constructions | 1 | Active |
| US11643883B1 | Adjustable flex system for directional drilling | Fixed Constructions | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.