David Walker
19Patents
14h-index
33Co-inventors
78Inventor score
Filing activity: Oct 2, 1995 → Aug 30, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7021389B2 | Bi-directional ball seat system and method | Fixed Constructions | 145 | Expired |
| US7150326B2 | Bi-directional ball seat system and method | Fixed Constructions | 102 | Expired |
| US7017664B2 | Single trip horizontal gravel pack and stimulation system and method | Fixed Constructions | 88 | Expired |
| US7331388B2 | Horizontal single trip system with rotating jetting tool | Fixed Constructions | 83 | Active |
| US7472750B2 | Single trip horizontal gravel pack and stimulation system and method | Fixed Constructions | 75 | Active |
| US7210527B2 | Single trip horizontal gravel pack and stimulation system and method | Fixed Constructions | 68 | Expired |
| US6405800B1 | Method and apparatus for controlling fluid flow in a well | Fixed Constructions | 59 | Expired |
| US6397949B1 | Method and apparatus for production using a pressure actuated circulating valve | Fixed Constructions | 45 | Expired |
| US6302208A | Gravel pack isolation system | Fixed Constructions | 33 | Expired |
| US5735105A | Encapsulation apparatus and process | Emerging Cross-Sectional Technologies | 32 | Expired |
| US7490669B2 | Multi-zone, single trip well completion system and methods of use | Fixed Constructions | 32 | Active |
| US7543647B2 | Multi-zone, single trip well completion system and methods of use | Fixed Constructions | 29 | Active |
| US6206100A | Separable one-trip perforation and gravel pack system and method | Fixed Constructions | 18 | Expired |
| US6568474B2 | Rigless one-trip perforation and gravel pack system and method | Fixed Constructions | 16 | Expired |
| US9524463B2 | Methods and systems for automating carbon footprinting | Emerging Cross-Sectional Technologies | 6 | Active |
| US6884060B2 | Apparatus for manufacturing encapsulated products | Performing Operations; Transporting | 4 | Expired |
| US11472119B2 | Devices, systems, and methods for multi-projector three dimensional printing | Physics | 0 | Active |
| US9219674B2 | Packet detection in the presence of interferers | Electricity | 0 | Active |
| US12263646B2 | Devices, systems, and methods for multi-projector three dimensional printing | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.