NATIONAL OILWELL DHT, L.P.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 4256
 
  
 
B24D TOOLS FOR GRINDING, BUFFING, OR SHARPENING 921
 
  
 
C22C ALLOYS 666
 
  
 
B22F WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER 349
 
  
 
C04B LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS 266
 
  
 
F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR 243
 
  
 
A61B DIAGNOSIS; SURGERY; IDENTIFICATION 1239
 
  
 
B23K SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM 192
 
  
 
C01B NON-METALLIC ELEMENTS; COMPOUNDS THEREOF178
 
  
 
C09K MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR194

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2018/0058,145 APPARATUS AND METHODS FOR ACTIVATING A DOWNHOLE PERCUSSION TOOLAug 25, 17Mar 01, 18[F04B, F15B, E21B]
2018/0052,131 WELLSITE SENSOR ASSEMBLY AND METHOD OF USING SAMEOct 20, 17Feb 22, 18[G01N]
2017/0356,284 Method of Pressure Testing a WellboreDec 17, 14Dec 14, 17[G01L, E21B]
2017/0167,201 DRILLING SYSTEMS AND HYBRID DRILL BITS FOR DRILLING IN A SUBTERRANEAN FORMATION AND METHODS RELATING THERETODec 05, 14Jun 15, 17[E21B]
2017/0081,944 WELLSITE HARDFACING WITH DISTRIBUTED HARD PHASE AND METHOD OF USING SAMESep 21, 15Mar 23, 17[C23C, B23K, E21B, C22C]
2015/0233,188 Downhole Mills and Improved Cutting StructuresSep 25, 13Aug 20, 15[E21B]
2015/0132,604 Multilayered Coating for Downhole Tools with Enhanced Wear Resistance and Acidic Corrosion ResistanceNov 12, 14May 14, 15[C25D, E21B]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9909395 Wellsite hardfacing with distributed hard phase and method of using sameSep 21, 15Mar 06, 18[C23C, B23K, E21B, C22C]
9840874 Hybrid rolling cone drill bits and methods for manufacturing sameDec 31, 15Dec 12, 17[E21B, B24D]
9771790 Downhole measurement assembly, tool and methodFeb 20, 13Sep 26, 17[E21B]
9752411 Downhole activation assembly with sleeve valve and method of using sameJul 25, 14Sep 05, 17[E21B]
9732573 Downhole activation assembly with offset bore and method of using sameJan 02, 15Aug 15, 17[E21B]
9695641 Drilling systems and fixed cutter bits with adjustable depth-of-cut to control torque-on-bitOct 24, 13Jul 04, 17[E21B]
9631435 Matrix fixed cutter drill bits and methods for manufacturing sameDec 10, 13Apr 25, 17[E21B]
9604345 Hard-facing for downhole tools and matrix bit bodies with enhanced wear resistance and fracture toughnessNov 01, 13Mar 28, 17[C01B, C04B, B22F, B24D, E21B, C22C]
9593547 Downhole shock assembly and method of using sameJul 30, 13Mar 14, 17[E21B]
9574407 Drilling systems and multi-faced drill bit assembliesAug 13, 14Feb 21, 17[E21B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2015/0176,335 IN-SITU BORON DOPED PDC ELEMENTAbandonedFeb 26, 15Jun 25, 15[E21B, B24D]
2012/0312,603 OPTIMIZATION OF DRILL BIT CUTTING STRUCTUREAbandonedJun 09, 11Dec 13, 12[G06F, G06G, E21B]
2012/0031,671 Drill Bits With Rolling Cone Reamer SectionsAbandonedAug 03, 10Feb 09, 12[E21B]
2011/0171,414 Sacrificial Catalyst Polycrystalline Diamond ElementAbandonedNov 22, 10Jul 14, 11[B24D, E21B]

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