Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7227363 | Determining formation anisotropy based in part on lateral current flow measurements | Michael S. Bittar | 2007-06-05 |
| 6958610 | Method and apparatus measuring electrical anisotropy in formations surrounding a wellbore | — | 2005-10-25 |
| 6819112 | Method of combining vertical and magnetic dipole induction logs for reduced shoulder and borehole effects | Li Gao | 2004-11-16 |
| 6765386 | Galvanic method of measuring electrical anisotropy | Li Gao | 2004-07-20 |
| 6727706 | Virtual steering of induction tool for determination of formation dip angle | Li Gao | 2004-04-27 |
| 6556016 | Induction method for determining dip angle in subterranean earth formations | Li Gao, Luis Sanmartin | 2003-04-29 |
| 6393364 | Determination of conductivity in anisotropic dipping formations from magnetic coupling measurements | Li Gao | 2002-05-21 |
| 5757191 | Virtual induction sonde for steering transmitted and received signals | — | 1998-05-26 |
| 5506769 | Method for enhancing vertical resolution of nuclear well logging instruments | Chu-Chiu Fu, David Orlando Torres | 1996-04-09 |
| 5453693 | Logging system for measuring dielectric properties of fluids in a cased well using multiple mini-wave guides | Paul L. Sinclair, Shey-Min Su | 1995-09-26 |
| 5191290 | Logging apparatus for measurement of earth formation resistivity | Roland E. Chemali | 1993-03-02 |
| 5115198 | Pulsed electromagnetic dipmeter method and apparatus employing coils with finite spacing | Shey-Min Su | 1992-05-19 |
| 5045795 | Azimuthally oriented coil array for MWD resistivity logging | Paul L. Sinclair, Roland E. Chemali, Shey-Min Su | 1991-09-03 |
| 5038107 | Method and apparatus for making induction measurements through casing | Roland E. Chemali, Paul L. Sinclair, Shey-Min Su | 1991-08-06 |
| 4980643 | Induction logging and apparatus utilizing skew signal measurements in dipping beds | Shey-Min Su | 1990-12-25 |
| 4583045 | Pulsed induction logging for determining invaded zone properties | — | 1986-04-15 |
| 4481472 | Pulsed induction logging for determining conductivity and invaded zone properties | — | 1984-11-06 |
| 4468623 | Method and apparatus using pad carrying electrodes for electrically investigating a borehole | David E. Palaith, David Chan | 1984-08-28 |
| 4302722 | Induction logging utilizing resistive and reactive induced signal components to determine conductivity and coefficient of anisotropy | — | 1981-11-24 |
| 4300098 | Microwave electromagnetic logging with mudcake correction | Gerald S. Huchital | 1981-11-10 |