PILOT DRILLING CONTROL LIMITED
16Patents
11Active
16Granted
42Portfolio score
Filing activity: Oct 8, 1999 → Jun 11, 2014 · 8 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7690422B2 | Drill-string connector | Fixed Constructions | 39 | Active |
| US7216726B2 | Downhole fluid-tight flexible joint | Fixed Constructions | 17 | Expired |
| US7377337B2 | Downhole drilling tool | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US6546581B1 | Casing scraper | Performing Operations; Transporting | 8 | Expired |
| US6279669A | Indexing mechanism and apparatus incorporating the same | Fixed Constructions | 6 | Expired |
| US8047278B2 | Hydraulic connector apparatuses and methods of use with downhole tubulars | Fixed Constructions | 6 | Active |
| US8590629B2 | Flow stop valve and method | Emerging Cross-Sectional Technologies | 5 | Active |
| US8002028B2 | Hydraulic connector apparatuses and methods of use with downhole tubulars | Fixed Constructions | 3 | Active |
| US8381823B2 | Downhole tubular connector | Fixed Constructions | 2 | Active |
| US8316930B2 | Downhole tubular connector | Fixed Constructions | 2 | Active |
| US8006753B2 | Hydraulic connector apparatuses and methods of use with downhole tubulars | Fixed Constructions | 2 | Active |
| US7182161B2 | Drill string tool with bearing sleeve | Fixed Constructions | 2 | Expired |
| US9347286B2 | Flow stop valve | Fixed Constructions | 1 | Active |
| US9677376B2 | Flow stop valve | Emerging Cross-Sectional Technologies | 1 | Active |
| US8776887B2 | Flow stop valve | Emerging Cross-Sectional Technologies | 1 | Active |
| US8752630B2 | Flow stop valve | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.