David J. McWhorter
23Patents
10h-index
21Co-inventors
75Inventor score
Filing activity: Feb 1, 1990 → Mar 18, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6164619A | Bi-directional sealing ram | Emerging Cross-Sectional Technologies | 39 | Expired |
| US7921917B2 | Multi-deployable subsea stack system | Fixed Constructions | 35 | Active |
| US5294088A | Variable bore packer for a ram-type blowout preventer | Fixed Constructions | 26 | Expired |
| US6843463B1 | Pressure regulated slip ram on a coil tubing blowout preventer | Emerging Cross-Sectional Technologies | 23 | Expired |
| US5005802A | Variable bore packer for a ram type blowout preventer | Fixed Constructions | 21 | Expired |
| US6974135B2 | Variable bore ram | Fixed Constructions | 20 | Expired |
| US6484808B2 | Stripper/packer | Fixed Constructions | 20 | Expired |
| US7270190B2 | Variable size coil tubing gripping elements | Fixed Constructions | 18 | Expired |
| US8944403B2 | Blowout preventer with pressure-isolated operating piston assembly | Emerging Cross-Sectional Technologies | 11 | Active |
| US8640775B2 | Multi-deployable subsea stack system | Fixed Constructions | 10 | Active |
| US9140090B2 | Subsea pressure reduction system | Mechanical Engineering; Lighting; Heating | 10 | Active |
| US7338027B1 | Fluid saving blowout preventer operator system | Fixed Constructions | 8 | Active |
| US8365830B2 | Multi-deployable subsea stack system | Fixed Constructions | 7 | Active |
| US9267335B2 | Breech lock coupling | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US9291020B2 | Blowout preventer system with three control pods | Fixed Constructions | 5 | Active |
| US9422782B2 | Control pod for blowout preventer system | Fixed Constructions | 4 | Active |
| US9957768B2 | Subsea pressure reduction system | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US9127696B2 | Shape memory alloy powered hydraulic accumulator | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US9068427B2 | Asymmetrical button for ram-type blowout preventers | Emerging Cross-Sectional Technologies | 2 | Active |
| US10746328B2 | Breech lock coupling | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US9803447B2 | Asymmetrical button for ram-type blowout preventers | Emerging Cross-Sectional Technologies | 1 | Active |
| US9874064B2 | Shape memory alloy powered hydraulic accumulator | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US7637474B2 | Fluid saving blowout preventer operator system | Fixed Constructions | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.