WENZEL DOWNHOLE TOOLS 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 987
 
  
 
F16C SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OF CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS 268
 
  
 
B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING 155
 
  
 
F16L PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL169

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9388652 Hydraulic jar with multiple high pressure chambersMar 25, 13Jul 12, 16[E21B]
8360109 Adjustable bent housing with rotational stopSep 15, 09Jan 29, 13[F16L]
8157025 Adjustable angle drive connection for a downhole drilling motorMay 15, 09Apr 17, 12[E21B]
7717472 Method of locking tubular components in end to end relationFeb 06, 07May 18, 10[E21B]
7635224 Method of adjusting backlash in a down hole bearing assemblySep 20, 06Dec 22, 09[F16C, E21B]
7308956 Method of securing a rotary cutter to a body of a down hole tool and a rotary cutter assemblySep 20, 05Dec 18, 07[E21B]
7299886 Stabilized down hole drilling motorFeb 14, 06Nov 27, 07[E21B]
7186182 Drive line for down hole mud motorApr 29, 05Mar 06, 07[E21B]
5547032 Apparatus for drilling curved sections of well holesJan 09, 95Aug 20, 96[E21B]
5350242 Bearing assembly for a downhole motorJun 17, 93Sep 27, 94[E21B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2009/0196,541 FLOW BEARING FOR HIGH PRESSURE APPLICATIONSAbandonedJan 30, 09Aug 06, 09[F16C]
2008/0303,275 THREADED CONNECTIONAbandonedJun 04, 08Dec 11, 08[F16L]
2004/0089,461 Downhole percussion drilling apparatusAbandonedJul 17, 03May 13, 04[E21B]
6416225 Bearing assembly for wellbore drillingExpiredOct 26, 00Jul 09, 02[E21B]
5964307 Shock tool for use in directional drillingExpiredJun 20, 97Oct 12, 99[E21B]
5101914 Orientatable adjustable bent housingExpiredOct 31, 90Apr 07, 92[E21B]

Top Inventors for This Owner

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