Inventor · disambiguated record
Sigbjorn Sangesland
Also filed as: SANGESLAND SIGBJORN
5 granted patents·2 pending applications·290 citations·filing 1993–2021
83Inventor score
Technology areasE21B
Files withFOSSLI BORRE1HEAVELOCK AS1NORSK HYDRO AS1NORWEGIAN UNIV OF SCIENCE AND TECHNOLOGY1NTNU TECHNOLOGY TRANSFER AS1
Top patents by PatentIndex Score
7 records- 0189US8978774B2System and method for drilling a subsea wellFOSSLI BORRE·Filed 2010·Granted Mar 17, 2015·19 cites·26 claims
- 0288US5368114AUnder-reaming tool for boreholesFiled 1993·Granted Nov 29, 1994·188 cites·12 claims
- 0378US7367410B2Method and device for liner systemOCEAN RISER SYSTEMS AS·Filed 2003·Granted May 6, 2008·58 cites·20 claims
- 0448US10156105B2Drill apparatus for a floating drill rigHEAVELOCK AS·Filed 2016·Granted Dec 18, 2018·1 cites·21 claims
- 0548US5404953ABlow-out prevention device for shutting off an annulus between a drill column and a well wall when drilling for oil or gasNORSK HYDRO AS·Filed 1993·Granted Apr 11, 1995·24 cites·13 claims
- 0638US2023151725A1Determination of Drillstring Parameters and Associated ControlNORWEGIAN UNIV OF SCIENCE AND TECHNOLOGY·Filed 2021·Application pending·0 cites
- 0735US2006289074A1Pipe with a canal in the pipe wallNTNU TECHNOLOGY TRANSFER AS·Filed 2006·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →