Thomas D. MacDougall
23Patents
15h-index
51Co-inventors
84Inventor score
Filing activity: Feb 20, 1996 → Jan 27, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7665537B2 | System and method to seal using a swellable material | Fixed Constructions | 129 | Active |
| US7537056B2 | System and method for gas shut off in a subterranean well | Fixed Constructions | 66 | Active |
| US6766854B2 | Well-bore sensor apparatus and method | Fixed Constructions | 66 | Expired |
| US5692565A | Apparatus and method for sampling an earth formation through a cased borehole | Fixed Constructions | 62 | Expired |
| US5779085A | Expandable pin plug for automated use | Mechanical Engineering; Lighting; Heating | 53 | Expired |
| US7673678B2 | Flow control device with a permeable membrane | Fixed Constructions | 48 | Active |
| US5687806A | Method and apparatus for drilling with a flexible shaft while using hydraulic assistance | Fixed Constructions | 37 | Expired |
| US9650851B2 | Autonomous untethered well object | Fixed Constructions | 24 | Active |
| US5746279A | Method and apparatus for changing bits while drilling with a flexible shaft | Fixed Constructions | 23 | Expired |
| US8499843B2 | System and method to seal using a swellable material | Fixed Constructions | 22 | Active |
| US7581440B2 | Apparatus and methods to perform downhole measurements associated with subterranean formation evaluation | Fixed Constructions | 22 | Active |
| US7360600B2 | Subsurface safety valves and methods of use | Fixed Constructions | 19 | Expired |
| US7455114B2 | Snorkel device for flow control | Fixed Constructions | 18 | Expired |
| US7635029B2 | Downhole electrical-to-hydraulic conversion module for well completions | Mechanical Engineering; Lighting; Heating | 16 | Active |
| US7543640B2 | System and method for controlling undesirable fluid incursion during hydrocarbon production | Fixed Constructions | 16 | Active |
| US7464761B2 | Flow control system for use in a well | Fixed Constructions | 9 | Active |
| US7779684B2 | Apparatus and methods to perform downhole measurements associated with subterranean formation evaluation | Fixed Constructions | 6 | Active |
| US10544657B2 | Apparatus and methods for well intervention | Fixed Constructions | 3 | Active |
| US9464489B2 | Method and apparatus for pipe-conveyed well logging | Physics | 2 | Active |
| US8403066B2 | Control line hybrid junction assembly | Fixed Constructions | 1 | Active |
| US11066903B2 | Apparatus and methods for well intervention | Fixed Constructions | 1 | Active |
| US7219728B2 | Method and apparatus for generating downhole power | Fixed Constructions | 1 | Expired |
| US9187957B2 | Method for motion compensation using wired drill pipe | Fixed Constructions | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.