TESTERS, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 1779

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7036595 Removal of tubulars from wellsSep 19, 02May 02, 06[E21B]
6578635 Lining removal method, system and components thereofSep 25, 00Jun 17, 03[E21B]
6213210 Removal of lining from tubingFeb 23, 99Apr 10, 01[E21B]
6186234 Removal of lining from tubingJun 02, 00Feb 13, 01[E21B]
5918690 Bottom rotation shaft actuatorFeb 03, 97Jul 06, 99[E21B]
5690170 Hydraulic cutting overshotFeb 22, 96Nov 25, 97[E21B]
5495902 Coil tubing hydraulic jar deviceJun 03, 94Mar 05, 96[E21B]
5411107 Coil tubing hydraulic jar deviceAug 03, 93May 02, 95[E21B]
5383522 Whipstock and methodMay 16, 94Jan 24, 95[E21B]
5379845 Method for setting a whipstock in a wellboreJun 06, 94Jan 10, 95[E21B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6568489 Apparatus and method for downhole lubrication replenishmentExpiredApr 17, 01May 27, 03[E21B]
D374019 Downhold cutter bladeExpiredJun 16, 94Sep 24, 96[]

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