Charles H. Dewey
75Patents
22h-index
51Co-inventors
91Inventor score
Filing activity: Oct 21, 1985 → Jan 20, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5332048A | Method and apparatus for automatic closed loop drilling system | Fixed Constructions | 281 | Expired |
| US6732817B2 | Expandable underreamer/stabilizer | Fixed Constructions | 270 | Expired |
| US5318138A | Adjustable stabilizer | Fixed Constructions | 140 | Expired |
| US5318137A | Method and apparatus for adjusting the position of stabilizer blades | Fixed Constructions | 117 | Expired |
| US7314099B2 | Selectively actuatable expandable underreamer/stablizer | Fixed Constructions | 102 | Expired |
| US6289999A | Fluid flow control devices and methods for selective actuation of valves and hydraulic drilling tools | Fixed Constructions | 102 | Expired |
| US6378632B1 | Remotely operable hydraulic underreamer | Fixed Constructions | 99 | Expired |
| US7048078B2 | Expandable underreamer/stabilizer | Fixed Constructions | 95 | Expired |
| US4693328A | Expandable well drilling tool | Fixed Constructions | 88 | Expired |
| US6612383B2 | Method and apparatus for milling well casing and drilling formation | Fixed Constructions | 86 | Expired |
| US4660657A | Underreamer | Fixed Constructions | 73 | Expired |
| US7513318B2 | Steerable underreamer/stabilizer assembly and method | Fixed Constructions | 73 | Active |
| US6752211B2 | Method and apparatus for multilateral junction | Fixed Constructions | 66 | Expired |
| US5771972A | One trip milling system | Fixed Constructions | 56 | Expired |
| US5171139A | Moineau motor with conduits through the stator | Emerging Cross-Sectional Technologies | 39 | Expired |
| US6648068B2 | One-trip milling system | Fixed Constructions | 35 | Expired |
| US5894889A | One trip milling system | Fixed Constructions | 34 | Expired |
| US6032748A | Non-rotatable stabilizer and torque reducer | Fixed Constructions | 34 | Expired |
| US7506703B2 | Drilling and hole enlargement device | Fixed Constructions | 34 | Active |
| US6499537B1 | Well reference apparatus and method | Fixed Constructions | 33 | Expired |
| US7757787B2 | Drilling and hole enlargement device | Fixed Constructions | 28 | Active |
| US7207401B2 | One trip milling system | Fixed Constructions | 22 | Expired |
| US6554062B1 | Anchor apparatus and method | Fixed Constructions | 21 | Expired |
| US6354375B1 | Lateral well tie-back method and apparatus | Fixed Constructions | 21 | Expired |
| US7178589B2 | Thru tubing tool and method | Fixed Constructions | 18 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.