EXPRO NORTH SEA LIMITED

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 3066
 
  
 
G01V GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS 971
 
  
 
H04B TRANSMISSION 4206
 
  
 
G01F MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME 356
 
  
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING271
 
  
 
G08B SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS 292
 
  
 
C23F NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACES 135
 
  
 
F16D COUPLINGS FOR TRANSMITTING ROTATION 190
 
  
 
F16L PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL169
 
  
 
F23M CONSTRUCTIONAL DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR 115

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2015/0267,530 DOWNHOLE COMMUNICATIONSep 17, 13Sep 24, 15[E21B]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9786431 Electrical power and/or electrical signal transmissionDec 13, 11Oct 10, 17[H02J, H04B, H01F, G01D, E21B]
9546539 Downhole power generationJun 25, 09Jan 17, 17[H04B, F16D, E21B, G01V]
9518444 Valve assemblyNov 15, 11Dec 13, 16[E21B]
9506341 Transmitting power through a wellhead using at least one toroidJun 19, 12Nov 29, 16[G08B, E21B, G01V]
9371727 Well monitoringDec 08, 11Jun 21, 16[E21B]
9022102 Control of sub surface safety valvesJun 16, 09May 05, 15[E21B, G01V]
8164475 Downhole communicationNov 28, 05Apr 24, 12[G01V]
7806180 Signalling systems and methods for communicating with a downhole location in a well installationMar 20, 06Oct 05, 10[E21B]
7554458 Downhole communicationNov 17, 05Jun 30, 09[G01V]
7460438 Downhole data communicationJul 02, 04Dec 02, 08[E21B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2014/0190,703 LANDING STRINGAbandonedJul 24, 12Jul 10, 14[E21B]
2014/0175,317 BALL VALVEAbandonedJul 24, 12Jun 26, 14[E21B]
2014/0174,755 VALVEAbandonedJul 24, 12Jun 26, 14[E21B]
2013/0292,265 IMPRESSED CURRENT CATHODIC PROTECTIONAbandonedDec 06, 11Nov 07, 13[C23F]
2013/0255,950 Perforating Gun and Method of Perforating a WellAbandonedMay 19, 11Oct 03, 13[E21B]
2012/0061,090 LANDING STRING ASSEMBLYAbandonedJan 15, 10Mar 15, 12[E21B]
2011/0163,830 FLOW LINE ELECTRIC IMPEDANCE GENERATIONAbandonedJun 16, 09Jul 07, 11[H03J]
2010/0047,040 DEPLOYMENT SYSTEMAbandonedMay 21, 07Feb 25, 10[B65G, B63B]
6788076 Apparatus for determining doping concentration of a semiconductor waferExpiredJul 09, 03Sep 07, 04[G01R]
2004/0094,961 Tubing couplingAbandonedOct 08, 03May 20, 04[F16L]
2003/0019,301 Flow monitoring apparatusAbandonedSep 21, 01Jan 30, 03[G01F]
6262578 Detection and location of current leakage paths and detection of oscillationsExpiredFeb 09, 98Jul 17, 01[G01R]
5529126 Valve control apparatusExpiredOct 28, 94Jun 25, 96[E21B]
5501242 Pressure relief valveExpiredMar 13, 95Mar 26, 96[F16K]
5501272 Multi-sensor relief valve well test systemExpiredMar 25, 94Mar 26, 96[E21B]
5484022 Tubing test valveExpiredMar 25, 94Jan 16, 96[E21B]
5259456 Drill stem test toolsExpiredSep 26, 91Nov 09, 93[E21B]
5222559 ValvesExpiredOct 08, 91Jun 29, 93[E21B]
5193619 Well control apparatusExpiredOct 08, 91Mar 16, 93[E21B]

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