Inventor · disambiguated record
Henk H. Jelsma
Also filed as: JELSMA HENK · JELSMA HENK H
9 granted patents·2 pending applications·282 citations·filing 1988–2019
90Inventor score
Technology areasE21B
Top patents by PatentIndex Score
11 records- 0186US4938299AFlexible centralizerBAROID TECHNOLOGY INC·Filed 1989·Granted Jul 3, 1990·84 cites·16 claims
- 0286US4880067AApparatus for drilling a curved boreholeBAROID TECHNOLOGY INC·Filed 1988·Granted Nov 14, 1989·76 cites·8 claims
- 0385US7441595B2Method and apparatus for single-run formation of multiple lateral passages from a wellboreJELSMA HENK H·Filed 2006·Granted Oct 28, 2008·31 cites·19 claims
- 0478US7422059B2Fluid injection stimulated heavy oil or mineral production systemJELSMA HENK H·Filed 2005·Granted Sep 9, 2008·21 cites·12 claims
- 0577US8590618B2Method and apparatus for single run cutting of well casing and forming subsurface lateral passages from a wellJELSMA HENK H·Filed 2011·Granted Nov 26, 2013·6 cites·14 claims
- 0671US4928767AMethod and apparatus for setting and retrieving a deflection toolBAROID TECHNOLOGY INC·Filed 1989·Granted May 29, 1990·44 cites·5 claims
- 0769US8789607B2Method and apparatus for subsea wellhead encapsulationJELSMA HENK H·Filed 2012·Granted Jul 29, 2014·7 cites·17 claims
- 0869US8770316B2Method and apparatus for high pressure radial pulsed jetting of lateral passages from vertical to horizontal wellboresJELSMA HENK H·Filed 2009·Granted Jul 8, 2014·12 cites·6 claims
- 0964US11193332B2Slider compensated flexible shaft drilling systemSCHLUMBERGER TECHNOLOGY CORP·Filed 2019·Granted Dec 7, 2021·1 cites·20 claims
- 1041US2014008129A1Multidirectional wellbore penetration system and methods of useJELSMA HENK H·Filed 2013·Application pending·0 cites
- 1135US2007095530A1Steam energized heavy oil production systemJELSMA HENK H·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →