DRECO ENERGY SERVICES 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 393
 
  
 
E04B GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS 146
 
  
 
F16C SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OF CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS 169
 
  
 
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
8646976 Auto-centering structural bearingNov 30, 11Feb 11, 14[F16C, E04B, E01D]
8033917 Drive shaft assembly for a downhole motorDec 16, 08Oct 11, 11[F16D]
5647446 Two way hydraulic drilling jarOct 19, 95Jul 15, 97[E21B]
5217080 Sealing system for a sealed bearing assemblySep 30, 91Jun 08, 93[E21B]
5123493 Valve used in a hydraulic drilling jarApr 08, 91Jun 23, 92[E21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6220807 Tubular handling systemExpiredMay 12, 97Apr 24, 01[E21B]
5377771 Sealed bearing assembly used in earth drillingExpiredNov 16, 93Jan 03, 95[E21B]

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