James W. Estep
19Patents
13h-index
29Co-inventors
74Inventor score
Filing activity: Apr 18, 1997 → May 2, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7172038B2 | Well system | Fixed Constructions | 175 | Expired |
| US6923273B2 | Well system | Fixed Constructions | 125 | Expired |
| US5857531A | Bottom hole assembly for directional drilling | Fixed Constructions | 83 | Expired |
| US6318470A | Recirculatable ball-drop release device for lateral oilwell drilling applications | Fixed Constructions | 45 | Expired |
| US6761574B1 | Coiled tubing connector | Fixed Constructions | 29 | Expired |
| US6598687B2 | Three dimensional steerable system | Fixed Constructions | 27 | Expired |
| US6712146B2 | Downhole assembly releasable connection | Fixed Constructions | 25 | Expired |
| US6607044B1 | Three dimensional steerable system and method for steering bit to drill borehole | Fixed Constructions | 20 | Expired |
| US7195083B2 | Three dimensional steering system and method for steering bit to drill borehole | Fixed Constructions | 20 | Expired |
| US6843332B2 | Three dimensional steerable system and method for steering bit to drill borehole | Fixed Constructions | 19 | Expired |
| US6543532B2 | Electrical surface activated downhole circulating sub | Fixed Constructions | 15 | Expired |
| US7059881B2 | Spoolable composite coiled tubing connector | Fixed Constructions | 14 | Expired |
| US6367366B1 | Sensor assembly | Fixed Constructions | 14 | Expired |
| US6840337B2 | Method and apparatus for removing cuttings | Fixed Constructions | 12 | Expired |
| US6349763B1 | Electrical surface activated downhole circulating sub | Fixed Constructions | 10 | Expired |
| US7950914B2 | Braze or solder reinforced Moineau stator | Emerging Cross-Sectional Technologies | 8 | Active |
| US7114582B2 | Method and apparatus for removing cuttings from a deviated wellbore | Fixed Constructions | 6 | Expired |
| US7416026B2 | Apparatus for changing flowbore fluid temperature | Emerging Cross-Sectional Technologies | 6 | Expired |
| US8333231B2 | Braze or solder reinforced moineu stator | Emerging Cross-Sectional Technologies | 5 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.