Issued Patents All Time
Showing 26–50 of 91 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8893822 | Apparatus and methods for real time communication between drill bit and drilling assembly | Tu Tien Trinh | 2014-11-25 |
| 8887832 | Apparatus and methods for corrosion protection of downhole tools | Tu Tien Trinh | 2014-11-18 |
| 8777088 | Methods for attaching cutting elements to earth-boring tools using tapered surfaces | Tu Tien Trinh, Xiaomin Cheng | 2014-07-15 |
| 8746367 | Apparatus and methods for detecting performance data in an earth-boring drilling tool | Anthony A. DiGiovanni | 2014-06-10 |
| 8695728 | Formation evaluation using a bit-based active radiation source and a gamma ray detector | Tu Tien Trinh, David A. Curry, Xiaomin Cheng, Feyzi Inanc, Yi Liu | 2014-04-15 |
| 8616089 | Method of making an earth-boring particle-matrix rotary drill bit | Heeman Choe, John H. Stevens | 2013-12-31 |
| 8573326 | Method and apparatus to adjust weight-on-bit/torque-on-bit sensor bias | Tu Tien Trinh | 2013-11-05 |
| 8573327 | Apparatus and methods for estimating tool inclination using bit-based gamma ray sensors | Tu Tien Trinh, Xiaomin Cheng | 2013-11-05 |
| 8481920 | Apparatus and method for determining formation density from nuclear density measurements made using sensors at more than one location | Feyzi Inanc, W. Allen Gilchrist, Tu Tien Trinh, Yi Liu | 2013-07-09 |
| 8376065 | Monitoring drilling performance in a sub-based unit | Sorin Gabriel Teodorescu, Matthew J. Meiners, John G. Evans | 2013-02-19 |
| 8297380 | Casing and liner drilling shoes having integrated operational components, and related methods | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Evan C. Turner +1 more | 2012-10-30 |
| 8245793 | Apparatus and method for determining corrected weight-on-bit | Tu Tien Trinh | 2012-08-21 |
| 8245792 | Drill bit with weight and torque sensors and method of making a drill bit | Tu Tien Trinh, Daryl L. Pritchard | 2012-08-21 |
| 8240403 | Earth-boring tools with improved retention of cutting elements installed within pockets | Tu Tien Trinh | 2012-08-14 |
| 8225887 | Casing and liner drilling shoes with portions configured to fail responsive to pressure, and related methods | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Evan C. Turner +1 more | 2012-07-24 |
| 8225888 | Casing shoes having drillable and non-drillable cutting elements in different regions and related methods | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Evan C. Turner +1 more | 2012-07-24 |
| 8215384 | Bit based formation evaluation and drill bit and drill string analysis using an acoustic sensor | Tu Tien Trinh | 2012-07-10 |
| 8210280 | Bit based formation evaluation using a gamma ray sensor | Tu Tien Trinh, David A. Curry | 2012-07-03 |
| 8205693 | Casing and liner drilling shoes having selected profile geometries, and related methods | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Evan C. Turner +1 more | 2012-06-26 |
| 8201648 | Earth-boring particle-matrix rotary drill bit and method of making the same | Heeman Choe, John H. Stevens | 2012-06-19 |
| 8167059 | Casing and liner drilling shoes having spiral blade configurations, and related methods | Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Evan C. Turner +1 more | 2012-05-01 |
| 8162077 | Drill bit with weight and torque sensors | Keith Glasgow, Sorin Gabriel Teodorescu, Tu Tien Trinh, Daryl L. Pritchard, Xiaomin Cheng | 2012-04-24 |
| 8164980 | Methods and apparatuses for data collection and communication in drill string components | Paul E. Pastusek | 2012-04-24 |
| 8100196 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Daryl L. Pritchard, Keith Glasgow, Tu Tien Trinh, Paul J. Lutes | 2012-01-24 |
| 8087477 | Methods and apparatuses for measuring drill bit conditions | Tu Tien Trinh | 2012-01-03 |