Per Espen Edvardsen

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Fyllingsdalen, NO

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Patents Grantslast 30 patents

Information Patent Grant
Grinding arrangement for tool joints on a drill string
- Patent number 8,997,851
- Issue date Apr 7, 2015
- Siem Wis AS
- Per Espen Edvardsen
- B24 - GRINDING POLISHING
Information Patent Grant
Sealing arrangement, and corresponding method
- Patent number 8,985,229
- Issue date Mar 24, 2015
- Siem Wis AS
- Per Espen Edvardsen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Device and method for maintaining constant pressure on, and flow dr...
- Patent number 8,403,034
- Issue date Mar 26, 2013
- Siem Wis AS
- Tom Kjetil Askeland
- E21 - EARTH DRILLING MINING
Information Patent Grant
Seal for a drill string
- Patent number 8,066,062
- Issue date Nov 29, 2011
- Siem Wis AS
- Per Espen Edvardsen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Grinding Arrangement For Tool Joints On A Drill String
- Publication number 20130213634
- Publication date Aug 22, 2013
- Per Espen Edvardsen
- B08 - CLEANING
Information Patent Application
Sealing Arrangement, And Corresponding Method
- Publication number 20110308818
- Publication date Dec 22, 2011
- Per Espen Edvardsen
- E21 - EARTH DRILLING MINING
Information Patent Application
Device And Method For Maintaining Constant Pressure On, And Flow Dr...
- Publication number 20100236791
- Publication date Sep 23, 2010
- Tom Kjetil Askeland
- E21 - EARTH DRILLING MINING
Information Patent Application
Seal For A Drill String
- Publication number 20100218937
- Publication date Sep 2, 2010
- Per Espen Edvardsen
- E21 - EARTH DRILLING MINING