HOUSTON ENGINEERS, INC.

Patent Owner

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 987
 
  
 
F16D COUPLINGS FOR TRANSMITTING ROTATION 190

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5918689 Jar enhancerMay 06, 97Jul 06, 99[E21B]
5765638 Tool for use in retrieving an essentially cylindrical object from a well boreDec 26, 96Jun 16, 98[E21B]
5595244 Hydraulic jarJul 24, 95Jan 21, 97[E21B]
5595253 Hydraulic jar with improved detent ringJul 24, 95Jan 21, 97[E21B]
5503228 Jar apparatus and method of jarringDec 05, 94Apr 02, 96[E21B]
5447196 Hydraulic jarJan 27, 94Sep 05, 95[E21B]
5431221 Jar enhancerOct 29, 93Jul 11, 95[E21B]
5425430 Jar enhancerJan 27, 94Jun 20, 95[E21B]
5288271 Constant velocity universal joint assembly for downhole motorApr 13, 92Feb 22, 94[F16D]
5174393 Hydraulic jarJul 02, 91Dec 29, 92[E21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4552230 Drill string shock absorberExpiredApr 10, 84Nov 12, 85[E21B]
4226289 Independent one-way acting hydraulic jar sections for a rotary drill stringExpiredApr 27, 79Oct 07, 80[E21B]

Top Inventors for This Owner

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