Shengli Oilfield Shengji Petroleum Equipment Co., Ltd.

Qiuling Wang (2 out of 2 patents)

Xiqing Zhang (2 out of 2 patents)

Junfang Shen (2 out of 2 patents)

4.  Duanguang Zhang (2 out of 2 patents)

5.  Xiaonan Zhang (2 out of 2 patents)

6.  Yang Li (1 out of 7 patents)

7.  Ye Ji (1 out of 1 patent)

8.  Jidi Yu (1 out of 1 patent)

9.  Xiaoyu Cui (1 out of 1 patent)

10.  Zhongwei Li (1 out of 1 patent)

11.  Chunli Guan (1 out of 1 patent)

12.  Jiaojiao Zhang (1 out of 1 patent)

13.  Hailong Lv (1 out of 1 patent)

14.  Wenping Han (1 out of 1 patent)

15.  Yanli Jia (1 out of 1 patent)