XI AN TONGYUAN PETROTECH CO LT has a total of 11 patent applications. Its first patent ever was published in 2002. It filed its patents most often in WIPO (World Intellectual Property Organization), China and Canada. Its main competitors in its focus markets civil engineering and machines are INTERWELL P&A AS, OWEN OIL TOOLS INC and MYRON ZANDMER SOLIS.
# | Country | Total Patents | |
---|---|---|---|
#1 | WIPO (World Intellectual Property Organization) | 5 | |
#2 | China | 4 | |
#3 | Canada | 1 | |
#4 | United States | 1 |
# | Industry | |
---|---|---|
#1 | Civil engineering | |
#2 | Machines |
# | Technology | |
---|---|---|
#1 | Earth drilling | |
#2 | Explosive charges |
# | Name | Total Patents |
---|---|---|
#1 | Zhang Xi | 3 |
#2 | Zhang Guoan | 3 |
#3 | Guoan Zhang | 3 |
#4 | Zhang Tinghan | 3 |
#5 | Jianlong Cheng | 2 |
#6 | Zhou Zhihua | 2 |
#7 | Li Gangqiang | 2 |
#8 | Li Gangqiang Zhou | 1 |
#9 | Liu Jun | 1 |
#10 | Xin Yuan | 1 |
Publication | Filing date | Title |
---|---|---|
WO2008067771A1 | Balance weight device of perforator for horizontal oilwell | |
WO2008067772A1 | Buffer unit for perforation testing system of oil/gas well | |
CN101220738A | Portable sand-prevention perforating tool capable of effectively locating sand prevention material | |
CN1970989A | Throwing type high energy gas fracturing device | |
CN1970992A | Dynamic test device for composite perforator | |
WO2007031001A1 | Compound perforator without body | |
WO2006045248A1 | A high-energy gas fracture tool for through-tubing operation | |
CN1603575A | Oil-gas well perforator interlayer gun | |
US6991044B2 | High-energy combined well perforating device |