Inventor · disambiguated record
Kristian Harestad
Also filed as: HARESTAD KRISTIAN
12 granted patents·1 pending application·113 citations·filing 1996–2022
88Inventor score
Technology areasE21B
Top patents by PatentIndex Score
13 records- 0190US9157294B2Wave-inducing device, casing system and method for cementing a casing in a boreholeKLEPPA ERLING·Filed 2012·Granted Oct 13, 2015·17 cites·6 claims
- 0289US11454086B2Valve device and methodPETROLEUM TECHNOLOGY CO AS·Filed 2017·Granted Sep 27, 2022·6 cites·22 claims
- 0377US10450821B2Wellhead port plug assemblyPETROLEUM TECHNOLOGY CO AS·Filed 2015·Granted Oct 22, 2019·5 cites·19 claims
- 0472US5667015AWell barrierBJ SERVICES CO·Filed 1996·Granted Sep 16, 1997·77 cites·8 claims
- 0571US9611720B2Valve arrangement and method of operating the samePETROLEUM TECHNOLOGY CO AS·Filed 2014·Granted Apr 4, 2017·4 cites·12 claims
- 0668US12084943B2Valve device and methodPETROLEUM TECHNOLOGY CO AS·Filed 2022·Granted Sep 10, 2024·0 cites·20 claims
- 0765US10167699B2Expandable device for forming a cement plugPERIGON AS·Filed 2016·Granted Jan 1, 2019·2 cites·13 claims
- 0855US11230893B2Method of manufacturing a side pocket mandrel bodyPETROLEUM TECHNOLOGY CO AS·Filed 2020·Granted Jan 25, 2022·0 cites·11 claims
- 0946US10662723B2Method of manufacturing a side pocket mandrel bodyPETROLEUM TECHNOLOGY CO AS·Filed 2015·Granted May 26, 2020·0 cites·11 claims
- 1046US9580991B2Shear valveHARESTAD KRISTIAN·Filed 2012·Granted Feb 28, 2017·1 cites·13 claims
- 1140US12000248B2Gas lift valvePETROLEUM TECHNOLOGY CO AS·Filed 2020·Granted Jun 4, 2024·0 cites·15 claims
- 1240US8136601B2Power lift generatorTVEITEN MAGNAR·Filed 2008·Granted Mar 20, 2012·1 cites·10 claims
- 1338US2022170342A1Valve arrangementPETROLEUM TECHNOLOGY CO AS·Filed 2020·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →