Assignee
ROGALANDSFORSKNING
NO3 patents
Top patents by PatentIndex Score
US5526887AJun 18, 1996
Device for drilling holes in the crust of the earth, especially for drilling oil wells
ROGALANDSFORSKNING40 citations87
US6318482B1Nov 20, 2001
Blowout preventer
ROGALANDSFORSKNING36 citations80
US4903771AFeb 27, 1990
Method for establishing effective barriers to production of undesired fluids in the recovery of oil
ROGALANDSFORSKNING8 citations65