David Hirth
20Patents
17h-index
11Co-inventors
74Inventor score
Filing activity: Aug 28, 1997 → Aug 3, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5944108A | Method for multi-lateral completion and cementing the juncture with lateral wellbores | Fixed Constructions | 113 | Expired |
| US6079496A | Reduced-shock landing collar | Fixed Constructions | 107 | Expired |
| US6715541B2 | Ball dropping assembly | Fixed Constructions | 90 | Expired |
| US6866100B2 | Mechanically opened ball seat and expandable ball seat | Fixed Constructions | 78 | Expired |
| US7165622B2 | Packer with metal sealing element | Fixed Constructions | 78 | Expired |
| US6776228B2 | Ball dropping assembly | Fixed Constructions | 76 | Expired |
| US7114573B2 | Hydraulic setting tool for liner hanger | Fixed Constructions | 45 | Expired |
| US6672384B2 | Plug-dropping container for releasing a plug into a wellbore | Fixed Constructions | 45 | Expired |
| US6908121B2 | Locking arrangement for a threaded connector | Mechanical Engineering; Lighting; Heating | 44 | Expired |
| US6981547B2 | Wire lock expandable connection | Fixed Constructions | 35 | Expired |
| US7055611B2 | Plug-dropping container for releasing a plug into a wellbore | Fixed Constructions | 33 | Expired |
| US6962206B2 | Packer with metal sealing element | Fixed Constructions | 33 | Expired |
| US6877567B2 | Expansion set liner hanger and method of setting same | Fixed Constructions | 31 | Expired |
| US7225870B2 | Hydraulic tools for setting liner top packers and method for cementing liners | Fixed Constructions | 24 | Expired |
| US6902008B2 | Bi-directionally boosting and internal pressure trapping packing element system | Fixed Constructions | 22 | Expired |
| US7172029B2 | Bi-directionally boosting and internal pressure trapping packing element system | Fixed Constructions | 20 | Expired |
| US6241023A | Unlocking packer setting method and device | Fixed Constructions | 19 | Expired |
| US7048055B2 | Packer with integral cleaning device | Fixed Constructions | 14 | Expired |
| US6920927B2 | Method and apparatus for anchoring downhole tools in a wellbore | Fixed Constructions | 9 | Expired |
| US10597986B2 | Method and apparatus for bi-directionally anchoring a liner in a borehole | Fixed Constructions | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.