Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12011773 | Cutting elements with reduced variable back rake angle | Chris Cheng, Ning Li, David He, Kevin Waddell, Xu Wang +2 more | 2024-06-18 |
| 11879296 | Blade cap force modulation system for a drill bit | Ming Zhang, Chris Cheng, Qi Peng, Xiaohua Ke | 2024-01-23 |
| 11808090 | Force modulation system for a drill bit | Ming Zhang, Chris Cheng, Xiongwen Yang | 2023-11-07 |
| 11591858 | Cutting elements with increased curvature cutting edges | Chris Cheng, Jianhua Guo, Bo Zhou, Shijun Qiao, Chuang Zhang +3 more | 2023-02-28 |
| 11499377 | Force modulation system for a drill bit | Ming Zhang, Chris Cheng, Xiongwen Yang | 2022-11-15 |
| 11499378 | Blade cap force modulation system for a drill bit | Ming Zhang, Chris Cheng, Qi Peng, Xiaohua Ke | 2022-11-15 |
| 11401749 | Cutting element with reduced friction | Chris Cheng, Jianhua Guo, Jie Li, Xihui Hu, Yonghong Wang | 2022-08-02 |
| 11365589 | Cutting element with non-planar cutting edges | Chris Cheng, Xu Wang, Xiongwen Yang, YU-LIN LIU | 2022-06-21 |
| 10975628 | Drill bit nozzle and drill bit | Yuehua Xu, Weixiong Wang, Jianghe Luo, Runan Zhang | 2021-04-13 |
| RE48455 | Rolling cutter | Yuelin Shen, Youhe Zhang, Zhou Yong, Madapusi K. Keshavan | 2021-03-02 |
| D875147 | Drill bit | Yuehua Xu, Weixiong Wang, Jianghe Luo | 2020-02-11 |
| RE47369 | Rolling cutter | Yuelin Shen, Youhe Zhang, Zhou Yong, Madapusi K. Keshavan | 2019-04-30 |
| 9850717 | Methods for designing fixed cutter bits and bits made using such methods | Zhehua Zhang | 2017-12-26 |
| 9187962 | Methods of attaching rolling cutters in fixed cutter bits using sleeve, compression spring, and/or pin(s)/ball(s) | Yuri Burhan, Jonan Fulenchek, Youhe Zhang, Yuelin Shen | 2015-11-17 |
| 9033070 | Rolling cutter | Yuelin Shen, Youhe Zhang, Zhou Yong, Madapusi K. Keshavan | 2015-05-19 |
| 8800691 | Rolling cutter | Yuelin Shen, Youhe Zhang, Zhou Yong, Madapusi K. Keshavan | 2014-08-12 |
| 8413746 | Rolling cutter | Yuelin Shen, Youhe Zhang, Zhou Yong, Madapusi K. Keshavan | 2013-04-09 |
| 8091655 | Rolling cutter | Yuelin Shen, Youhe Zhang, Zhou Yong, Madapusi K. Keshavan | 2012-01-10 |
| 7757789 | Drill bit and insert having bladed interface between substrate and coating | Zhou Yong, Chris Tucker | 2010-07-20 |
| 7703559 | Rolling cutter | Yuelin Shen, Youhe Zhang, Zhou Yong, Madapusi K. Keshavan | 2010-04-27 |
| 7543661 | Roller cone bits with wear and fracture resistant surface | Anthony Griffo, Gregory T. Lockwood, Mohammed Boudrare | 2009-06-09 |
| 7347290 | Multi-part energizer for mechanical seal assembly | Zhou Yong | 2008-03-25 |
| 7188691 | Metal seal with impact-absorbing ring | Zhou Yong | 2007-03-13 |
| 7048080 | Roller cone bits with wear and fracture resistant surface | Anthony Griffo, Gregory T. Lockwood, Mohammed Boudrare | 2006-05-23 |