Ronald E. Pringle
125Patents
36h-index
29Co-inventors
90Inventor score
Filing activity: Feb 27, 1978 → Jan 19, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5411085A | Spoolable coiled tubing completion system | Fixed Constructions | 157 | Expired |
| US5542473A | Simplified sealing and anchoring device for a well tool | Fixed Constructions | 141 | Expired |
| US4520870A | Well flow control device | Fixed Constructions | 105 | Expired |
| US4531581A | Piston actuated high temperature well packer | Fixed Constructions | 104 | Expired |
| US5394951A | Bottom hole drilling assembly | Fixed Constructions | 94 | Expired |
| US5542472A | Metal coiled tubing with signal transmitting passageway | Physics | 93 | Expired |
| US5316094A | Well orienting tool and/or thruster | Physics | 85 | Expired |
| US4161219A | Piston actuated well safety valve | Fixed Constructions | 84 | Expired |
| US5257663A | Electrically operated safety release joint | Fixed Constructions | 74 | Expired |
| US4534414A | Hydraulic control fluid communication nipple | Emerging Cross-Sectional Technologies | 73 | Expired |
| US6070608A | Variable orifice gas lift valve for high flow rates with detachable power source and method of using | Emerging Cross-Sectional Technologies | 70 | Expired |
| US6302203A | Apparatus and method for communicating with devices positioned outside a liner in a wellbore | Fixed Constructions | 68 | Expired |
| US6068015A | Sidepocket mandrel with orienting feature | Emerging Cross-Sectional Technologies | 66 | Expired |
| US6328109A | Downhole valve | Fixed Constructions | 63 | Expired |
| US6276458A | Apparatus and method for controlling fluid flow | Fixed Constructions | 60 | Expired |
| US6378610B2 | Communicating with devices positioned outside a liner in a wellbore | Fixed Constructions | 59 | Expired |
| US4510994A | Pump out sub | Fixed Constructions | 58 | Expired |
| US4252197A | Piston actuated well safety valve | Fixed Constructions | 58 | Expired |
| US5469878A | Coiled tubing concentric gas lift valve assembly | Fixed Constructions | 58 | Expired |
| US5425420A | Spoolable coiled tubing completion system | Fixed Constructions | 57 | Expired |
| US6012518A | Electro-hydraulic well tool actuator | Fixed Constructions | 55 | Expired |
| US4844166A | Method and apparatus for recompleting wells with coil tubing | Fixed Constructions | 54 | Expired |
| US4771831A | Liquid level actuated sleeve valve | Fixed Constructions | 53 | Expired |
| USRE36723E | Spoolable coiled tubing completion system | General | 52 | Expired |
| US5465793A | Spoolable flexible hydraulic controlled annular control valve | Fixed Constructions | 51 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.