Tong Oil Tools Co., Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 789
 
  
 
B64D EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS266
 
  
 
F41F APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS 110
 
  
 
F42B EXPLOSIVE CHARGES, e.g. FOR BLASTING; FIREWORKS; AMMUNITION 138

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9297242 Structure for gunpowder charge in multi-frac composite perforating deviceDec 23, 14Mar 29, 16[B64D, E21B]
9297243 Composite perforation method and device with propping agentFeb 05, 13Mar 29, 16[E21B]
9027667 Structure for gunpowder charge in combined fracturing perforation deviceFeb 05, 13May 12, 15[E21B]
8960289 Combined fracturing and perforating method and device for oil and gas wellNov 10, 10Feb 24, 15[F42D, E21B, F42B]
8943944 Structure for gunpowder charge in multi-frac composite perforating devicesDec 14, 12Feb 03, 15[F41F, B64D, E21B]
8607856 Cable head for petroleum loggingMar 11, 10Dec 17, 13[E21B]
7819180 High-energy gas fracture apparatus for through-tubing operationsOct 27, 05Oct 26, 10[E21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2014/0053,715 COMPOSITE PERFORATION DEVICE WITH SCALLOPS ON THE INNER WALLAbandonedDec 14, 12Feb 27, 14[E21B]

Top Inventors for This Owner

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