PETROLINE WELLSYSTEMS 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 1284
 
  
 
F16L PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL268
 
  
 
F16J PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS149
 
  
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING172

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6719071 Apparatus and methods for drillingJan 08, 02Apr 13, 04[E21B]
6322109 Expandable tubing connector for expandable tubingMar 12, 01Nov 27, 01[F16L, F21B]
6223824 Downhole apparatusDec 17, 98May 01, 01[E21B]
6112818 Downhole setting tool for an expandable tubingMay 07, 98Sep 05, 00[E21B]
6065500 Expandable tubingJun 08, 99May 23, 00[F16L]
5924745 Connector assembly for an expandable slotted pipeFeb 23, 98Jul 20, 99[E21B, F16J]
5636661 Self-piloting check valveNov 29, 95Jun 10, 97[F16K]
5538082 Downhole running system & method for setting a downhole tool in a boreFeb 22, 95Jul 23, 96[E21B]
5467822 Pack-off toolFeb 28, 94Nov 21, 95[E21B]
5409059 Lock mandrel for downhole assembliesNov 09, 93Apr 25, 95[E21B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6968911 Apparatus and methods for drillingExpiredApr 12, 04Nov 29, 05[E21B]
2005/0029,812 Expandable slotted tubing string and method for connecting such a tubing stringAbandonedSep 14, 04Feb 10, 05[F16L]
6725937 Downhole apparatusExpiredApr 22, 02Apr 27, 04[E21B]
6125930 Downhole valveExpiredJan 26, 98Oct 03, 00[E21B]
5052849 Quick-locking connectorExpiredNov 13, 90Oct 01, 91[F16B]
4883121 Downhole lock assemblyExpiredJul 05, 88Nov 28, 89[E21B]

Top Inventors for This Owner

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