Phillip S. Sizer
19Patents
13h-index
33Co-inventors
78Inventor score
Filing activity: Oct 8, 1975 → Mar 2, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6464004B1 | Retrievable well monitor/controller system | Fixed Constructions | 77 | Expired |
| US4730677A | Method and system for maintenance and servicing of subsea wells | Fixed Constructions | 72 | Expired |
| US4515220A | Apparatus and method for rotating coil tubing in a well | Fixed Constructions | 69 | Expired |
| US5275038A | Downhole reeled tubing inspection system with fiberoptic cable | Physics | 61 | Expired |
| US4886114A | Electric surface controlled subsurface valve system | Fixed Constructions | 59 | Expired |
| US5191173A | Electrical cable in reeled tubing | Electricity | 56 | Expired |
| US4583592A | Well test apparatus and methods | Fixed Constructions | 46 | Expired |
| US4723606A | Surface controlled subsurface safety valve | Fixed Constructions | 42 | Expired |
| US4449587A | Surface controlled subsurface safety valves | Fixed Constructions | 39 | Expired |
| US4251176A | Well tubing handling apparatus | Fixed Constructions | 31 | Expired |
| US3999610A | Pipe snubbing method and apparatus | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US4108257A | Apparatus for controlling a well during drilling operations | Fixed Constructions | 21 | Expired |
| US4258794A | Underwater completion habitat | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US6648073B1 | Retrievable sliding sleeve flow control valve for zonal isolation control system | Fixed Constructions | 10 | Expired |
| US4026363A | Apparatus and method for performing a desired operation at a specified location in a well | Fixed Constructions | 9 | Expired |
| US5170845A | Subsurface safety valves and method and apparatus for their operation | Fixed Constructions | 6 | Expired |
| US5205355A | Subsurface safety valves and method and apparatus for their operation | Fixed Constructions | 4 | Expired |
| USRE30070E | Apparatus for treating wells | General | 2 | Expired |
| USRE31313E | Method and system for well testing | General | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.