Maurer Engineering Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6457538 Advanced coring apparatus and methodExpiredFeb 20, 01Oct 01, 02[E21B]
6313755 Downhole buried utility sensing and data transmission system and methodExpiredJun 02, 99Nov 06, 01[G01V]
5022471 Deviated wellbore drilling system and apparatusExpiredJan 08, 90Jun 11, 91[E21B]
4991668 Controlled directional drilling system and methodExpiredFeb 06, 89Feb 12, 91[E21B]
4828053 Deviated wellbore drilling system and apparatusExpiredJan 12, 88May 09, 89[E21B]
4665997 Pressure balanced bearing assembly for downhole motorsExpiredJul 26, 85May 19, 87[E21B]
4620601 Well drilling tool with diamond thrust bearingsExpiredSep 28, 81Nov 04, 86[E21B]
4468138 Manufacture of diamond bearingsExpiredSep 28, 81Aug 28, 84[F16C]
4415205 Triple branch completion with separate drilling and completion templatesExpiredJul 10, 81Nov 15, 83[E21B]
4410054 Well drilling tool with diamond radial/thrust bearingsExpiredDec 03, 81Oct 18, 83[E21B]
4402551 Method and apparatus to complete horizontal drain holesExpiredSep 10, 81Sep 06, 83[E21B]
4396075 Multiple branch completion with common drilling and casing templateExpiredJun 23, 81Aug 02, 83[E21B]
4396230 Multiple branch well containing one producer and one injector wellExpiredJun 23, 81Aug 02, 83[E21B]
4340334 Turbodrill with rubber rotor bearingsExpiredJan 30, 80Jul 20, 82[F01D]
4324299 Downhole drilling motor with pressure balanced bearing sealsExpiredJul 18, 80Apr 13, 82[F03B, E21B]
4246976 Down hole drilling motor with pressure balanced bearing sealsExpiredSep 11, 78Jan 27, 81[E21B]
4225000 Down hole drilling motor with pressure balanced bearing sealsExpiredSep 11, 78Sep 30, 80[E21B]
4225270 Method and apparatus for connecting a flowline to an offshore installationExpiredMay 22, 78Sep 30, 80[F16L, B63B, E21B]
4185704 Directional drilling apparatusExpiredMay 03, 78Jan 29, 80[E21B]

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