Andergauge Limited
16Patents
4Active
16Granted
36Portfolio score
Filing activity: Nov 18, 1998 → May 7, 2010 · 4 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6279670A | Downhole flow pulsing apparatus | Fixed Constructions | 108 | Expired |
| US6615933B1 | Downhole tool with extendable members | Fixed Constructions | 84 | Expired |
| US6508317B2 | Downhole apparatus and method of use | Fixed Constructions | 59 | Expired |
| US6439318B1 | Downhole apparatus | Fixed Constructions | 56 | Expired |
| US7168493B2 | Downhole tool | Fixed Constructions | 40 | Expired |
| US6588518B2 | Drilling method and measurement-while-drilling apparatus and shock tool | Fixed Constructions | 36 | Expired |
| US7823663B2 | Expandable reamer | Fixed Constructions | 30 | Active |
| US7703553B2 | Downhole tool having radially extendable members | Fixed Constructions | 26 | Expired |
| US6431294B1 | Percussive tool | Emerging Cross-Sectional Technologies | 25 | Expired |
| US6321857A | Directional drilling apparatus and method utilizing eccentric stabilizer | Fixed Constructions | 23 | Expired |
| US7013994B2 | Directional drilling apparatus | Fixed Constructions | 23 | Expired |
| US7077205B2 | Method and device to free stuck objects | Fixed Constructions | 19 | Expired |
| US8069926B2 | Method of controlling flow through a drill string using a valve positioned therein | Emerging Cross-Sectional Technologies | 16 | Active |
| US7461706B2 | Drilling apparatus with percussive action cutter | Fixed Constructions | 4 | Active |
| US8251144B2 | Flow diverter | Fixed Constructions | 3 | Active |
| US6289596A | Downhole tool | Fixed Constructions | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.