Robert A. Estes
31Patents
11h-index
39Co-inventors
75Inventor score
Filing activity: Dec 3, 1998 → Jun 30, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6347282B1 | Measurement-while-drilling assembly using gyroscopic devices and methods of bias removal | Fixed Constructions | 70 | Expired |
| US6529834B1 | Measurement-while-drilling assembly using gyroscopic devices and methods of bias removal | Physics | 50 | Expired |
| US6508316B2 | Apparatus to measure the earth's local gravity and magnetic field in conjunction with global positioning attitude determination | Physics | 34 | Expired |
| US8899322B2 | Autonomous downhole control methods and devices | Fixed Constructions | 33 | Active |
| US7114565B2 | Measurement-while-drilling assembly using real-time toolface oriented measurements | Physics | 33 | Expired |
| US7000700B2 | Measurement-while-drilling assembly using real-time toolface oriented measurements | Physics | 31 | Expired |
| US6212476A | Apparatus to measure the earth's local gravity and magnetic field in conjunction with global positioning attitude determining | Physics | 19 | Expired |
| US7763845B2 | Downhole navigation and detection system | Physics | 18 | Active |
| US7195062B2 | Measurement-while-drilling assembly using real-time toolface oriented measurements | Physics | 16 | Expired |
| US6842699B2 | Use of MWD assembly for multiple-well drilling | Physics | 14 | Expired |
| US7234540B2 | Gyroscopic steering tool using only a two-axis rate gyroscope and deriving the missing third axis | Physics | 12 | Expired |
| US6712159B2 | Lockable motor drive | Physics | 10 | Expired |
| US8122954B2 | Downhole depth computation methods and related system | Fixed Constructions | 7 | Active |
| US10858929B2 | Methods for drilling multiple parallel wells with passive magnetic ranging | Fixed Constructions | 7 | Active |
| US7252144B2 | Magnetometers for measurement-while-drilling applications | Electricity | 7 | Expired |
| US10801318B1 | Directional sensor with means for adjusting cancellation of interfering electromagnetic field | Physics | 6 | Active |
| US8528637B2 | Downhole depth computation methods and related system | Fixed Constructions | 5 | Active |
| US9804288B2 | Real-time, limited orientation sensor auto-calibration | Physics | 5 | Active |
| US8113041B2 | Gravitational method and apparatus for measuring true vertical depth in a borehole | Fixed Constructions | 5 | Active |
| US9963936B2 | Downhole closed loop drilling system with depth measurement | Fixed Constructions | 4 | Active |
| US7813878B2 | Gyroscopic steering tool using only a two-axis rate gyroscope and deriving the missing third axis | Physics | 4 | Active |
| US9605527B2 | Reducing rotational vibration in rotational measurements | Fixed Constructions | 3 | Active |
| US9163498B2 | Apparatus and methods for determining parameters downhole using gravity-affected sensor | Electricity | 2 | Active |
| US8131494B2 | Rotatable orientation independent gravity sensor and methods for correcting systematic errors | Physics | 2 | Active |
| US9157310B2 | Tripping indicator for MWD systems | Fixed Constructions | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.