John D. Roberts
17Patents
14h-index
45Co-inventors
74Inventor score
Filing activity: Mar 31, 1995 → Dec 30, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5887655A | Wellbore milling and drilling | Fixed Constructions | 190 | Expired |
| US6209636A | Wellbore primary barrier and related systems | Fixed Constructions | 59 | Expired |
| US6202752A | Wellbore milling methods | Fixed Constructions | 58 | Expired |
| US6116336A | Wellbore mill system | Fixed Constructions | 57 | Expired |
| US6070670A | Movement control system for wellbore apparatus and method of controlling a wellbore tool | Fixed Constructions | 49 | Expired |
| US6695056B2 | System for forming a window and drilling a sidetrack wellbore | Fixed Constructions | 44 | Expired |
| US6039118A | Wellbore tool movement control and method of controlling a wellbore tool | Fixed Constructions | 43 | Expired |
| US6886631B2 | Inflation tool with real-time temperature and pressure probes | Fixed Constructions | 42 | Expired |
| US7073580B2 | Inflation tool with real-time temperature and pressure probes | Fixed Constructions | 38 | Expired |
| US6070665A | Wellbore milling | Fixed Constructions | 29 | Expired |
| US5620051A | Whipstock | Fixed Constructions | 17 | Expired |
| US5522461A | Mill valve | Fixed Constructions | 16 | Expired |
| US6334487B1 | Valve assembly | Fixed Constructions | 15 | Expired |
| US6374918B2 | In-tubing wellbore sidetracking operations | Fixed Constructions | 14 | Expired |
| US6547006B1 | Wellbore liner system | Fixed Constructions | 13 | Expired |
| US7513305B2 | Apparatus and methods for operating a tool in a wellbore | Fixed Constructions | 7 | Expired |
| US7195069B2 | Method and apparatus for backing off a tubular member from a wellbore | Fixed Constructions | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.