Xianhong SUN

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Patents Grantslast 30 patents

Information Patent Grant
Structure for gunpowder charge in multi-frac composite perforating...
- Patent number 9,297,242
- Issue date Mar 29, 2016
- Tong Oil Tools Co., Ltd.
- Guoan Zhang
- E21 - EARTH DRILLING MINING
Information Patent Grant
Structure for gunpowder charge in combined fracturing perforation d...
- Patent number 9,027,667
- Issue date May 12, 2015
- Tong Oil Tools Co. Ltd.
- Guoan Zhang
- E21 - EARTH DRILLING MINING
Information Patent Grant
Combined fracturing and perforating method and device for oil and g...
- Patent number 8,960,289
- Issue date Feb 24, 2015
- Tong Oil Tools Co., Ltd.
- Guoan Zhang
- F42 - AMMUNITION BLASTING
Information Patent Grant
Structure for gunpowder charge in multi-frac composite perforating...
- Patent number 8,943,944
- Issue date Feb 3, 2015
- Tong Oil Tools Co., Ltd.
- Guoan Zhang
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
STRUCTURE FOR GUNPOWDER CHARGE IN MULTI-FRAC COMPOSITE PERFORATING...
- Publication number 20150107831
- Publication date Apr 23, 2015
- TONG PETROTECH INC
- Guoan ZHANG
- E21 - EARTH DRILLING MINING
Information Patent Application
STRUCTURE FOR GUNPOWDER CHARGE IN MULTI-FRAC COMPOSITE PERFORATING...
- Publication number 20140060295
- Publication date Mar 6, 2014
- TONG PETROTECH INC
- Guoan Zhang
- E21 - EARTH DRILLING MINING
Information Patent Application
STRUCTURE FOR GUNPOWDER CHARGE IN COMBINED FRACTURING PERFORATION D...
- Publication number 20130145924
- Publication date Jun 13, 2013
- TONG OIL TOOLS CO., LTD.
- Guoan ZHANG
- E21 - EARTH DRILLING MINING
Information Patent Application
COMBINED FRACTURING AND PERFORATING METHOD AND DEVICE FOR OIL AND G...
- Publication number 20130098681
- Publication date Apr 25, 2013
- Guoan Zhang
- F42 - AMMUNITION BLASTING