Issued Patents 2016
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9297242 | Structure for gunpowder charge in multi-frac composite perforating device | Jianlong Cheng, Xianhong Sun | 2016-03-29 |
| 9297243 | Composite perforation method and device with propping agent | Jianlong Cheng | 2016-03-29 |