Roger L. Schultz
325Patents
48h-index
156Co-inventors
93Inventor score
Filing activity: Apr 14, 1989 → Jul 12, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6408943B1 | Method and apparatus for placing and interrogating downhole sensors | Fixed Constructions | 187 | Expired |
| US6538576B1 | Self-contained downhole sensor and method of placing and interrogating same | Fixed Constructions | 154 | Expired |
| US5329811A | Downhole fluid property measurement tool | Fixed Constructions | 144 | Expired |
| US5799733A | Early evaluation system with pump and method of servicing a well | Fixed Constructions | 131 | Expired |
| US5992520A | Annulus pressure operated downhole choke and associated methods | Fixed Constructions | 118 | Expired |
| US6854522B2 | Annular isolators for expandable tubulars in wellbores | Fixed Constructions | 115 | Expired |
| US5273112A | Surface control of well annulus pressure | Fixed Constructions | 114 | Expired |
| US5058674A | Wellbore fluid sampler and method | Fixed Constructions | 108 | Expired |
| US6554064B1 | Method and apparatus for a sand screen with integrated sensors | Fixed Constructions | 107 | Expired |
| US6588507B2 | Apparatus and method for progressively gravel packing an interval of a wellbore | Fixed Constructions | 105 | Expired |
| US5101907A | Differential actuating system for downhole tools | Fixed Constructions | 105 | Expired |
| US6695061B2 | Downhole tool actuating apparatus and method that utilizes a gas absorptive material | Fixed Constructions | 100 | Expired |
| US6536530B2 | Hydraulic control system for downhole tools | Mechanical Engineering; Lighting; Heating | 99 | Expired |
| US7404416B2 | Apparatus and method for creating pulsating fluid flow, and method of manufacture for the apparatus | Emerging Cross-Sectional Technologies | 96 | Expired |
| US7699102B2 | Rechargeable energy storage device in a downhole operation | Fixed Constructions | 86 | Active |
| US5353875A | Methods of perforating and testing wells using coiled tubing | Fixed Constructions | 82 | Expired |
| US5316087A | Pyrotechnic charge powered operating system for downhole tools | Fixed Constructions | 82 | Expired |
| US5238070A | Differential actuating system for downhole tools | Fixed Constructions | 82 | Expired |
| US7017662B2 | High temperature environment tool system and method | Electricity | 81 | Expired |
| US5555945A | Early evaluation by fall-off testing | Fixed Constructions | 73 | Expired |
| US6073698A | Annulus pressure operated downhole choke and associated methods | Fixed Constructions | 70 | Expired |
| US5826662A | Apparatus for testing and sampling open-hole oil and gas wells | Fixed Constructions | 70 | Expired |
| US5687791A | Method of well-testing by obtaining a non-flashing fluid sample | Fixed Constructions | 69 | Expired |
| US4962815A | Inflatable straddle packer | Fixed Constructions | 68 | Expired |
| US5279363A | Shut-in tools | Fixed Constructions | 66 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.