John P. Davis
30Patents
15h-index
23Co-inventors
81Inventor score
Filing activity: Mar 1, 1991 → Jan 31, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6276452A | Apparatus for removal of milling debris | Fixed Constructions | 142 | Expired |
| US6679328B2 | Reverse section milling method and apparatus | Fixed Constructions | 131 | Expired |
| US5253714A | Well service tool | Fixed Constructions | 98 | Expired |
| US6357528B1 | One-trip casing cutting & removal apparatus | Fixed Constructions | 41 | Expired |
| US7610957B2 | Downhole debris catcher and associated mill | Fixed Constructions | 31 | Active |
| US7472745B2 | Well cleanup tool with real time condition feedback to the surface | Fixed Constructions | 27 | Active |
| US5123489A | Milling tool and method for removing a packer | Fixed Constructions | 26 | Expired |
| US6125929A | Casing cutter blade support sleeve | Fixed Constructions | 21 | Expired |
| US5494111A | Permanent whipstock | Fixed Constructions | 21 | Expired |
| US5909770A | Retrievable whipstock | Fixed Constructions | 19 | Expired |
| US7478687B2 | Coiled tubing conveyed milling | Fixed Constructions | 18 | Expired |
| US6227313A | Anti-torque tool | Fixed Constructions | 17 | Expired |
| US8555955B2 | One trip multiple string section milling of subterranean tubulars | Fixed Constructions | 17 | Active |
| US7156182B2 | Method and apparatus for one trip tubular expansion | Fixed Constructions | 17 | Expired |
| US8474522B2 | Downhole material retention apparatus | Fixed Constructions | 17 | Active |
| US7100700B2 | Downhole ball dropping apparatus | Fixed Constructions | 15 | Expired |
| US7779901B2 | Downhole debris catcher and associated mill | Fixed Constructions | 14 | Active |
| US8257585B2 | Debris catcher with retention within screen | Performing Operations; Transporting | 11 | Active |
| US6056049A | Wellhead retrieving tool | Fixed Constructions | 11 | Expired |
| US5649595A | Milling method for liners extending into deviated wellbores | Fixed Constructions | 10 | Expired |
| US6763753B1 | Hydraulic wireline cutter | Emerging Cross-Sectional Technologies | 10 | Expired |
| US7789154B2 | Eductor jet bushing for downhole use | Fixed Constructions | 9 | Active |
| US6702031B2 | Anchoring device removal method and apparatus | Fixed Constructions | 7 | Expired |
| US6805197B2 | Hydraulic wireline cutter | Emerging Cross-Sectional Technologies | 7 | Expired |
| US8727009B2 | Surface signal for flow blockage for a subterranean debris collection apparatus | Physics | 5 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.