Inventor · disambiguated record
Dwayne Leismer
Also filed as: LEISMER DWAYNE · LEISMER DWAYNE D
32 granted patents·1 pending application·1,089 citations·filing 1988–2023
98Inventor score
Top patents by PatentIndex Score
33 records- 0196US9988894B1System and method for installing a power line in a wellACCESSESP UK LTD·Filed 2015·Granted Jun 5, 2018·20 cites·21 claims
- 0293US6433991B1Controlling activation of devicesSCHLUMBERGER TECHNOLOGY CORP·Filed 2000·Granted Aug 13, 2002·130 cites·49 claims
- 0392US6247536B1Downhole multiplexer and related methodsCAMCO INT·Filed 1998·Granted Jun 19, 2001·148 cites·43 claims
- 0484US11105160B2Low profile, pressure balanced, oil expansion compensated downhole electrical connector systemACCESSESP UK LTD·Filed 2017·Granted Aug 31, 2021·9 cites·24 claims
- 0584US6308783B2Wellbore flow control deviceSCHLUMBERGER TECHNOLOGY CORP·Filed 2000·Granted Oct 30, 2001·56 cites·35 claims
- 0681US6491102B2Downhole multiplexer and related methodsCAMCO INT·Filed 2001·Granted Dec 10, 2002·53 cites·62 claims
- 0780US6296061B1Pilot-operated pressure-equalizing mechanism for subsurface valveCAMCO INT·Filed 1999·Granted Oct 2, 2001·86 cites·70 claims
- 0878US5310004AFail safe gas bias safety valveCAMCO INT·Filed 1993·Granted May 10, 1994·66 cites·6 claims
- 0977US5167284ASelective hydraulic lock-out well safety valve and methodCAMCO INT·Filed 1991·Granted Dec 1, 1992·65 cites·15 claims
- 1075US11525311B1System and method for well bore isolation of a retrievable motor assemblyACCESSESP UK LTD·Filed 2016·Granted Dec 13, 2022·2 cites·14 claims
- 1175US4838355ADual hydraulic safety valveCAMCO INC·Filed 1988·Granted Jun 13, 1989·46 cites·16 claims
- 1274US5323853AEmergency downhole disconnect toolCAMCO INT·Filed 1993·Granted Jun 28, 1994·66 cites·13 claims
- 1372US5984006AEmergency release toolCAMCO INT·Filed 1997·Granted Nov 16, 1999·60 cites·67 claims
- 1471US12276163B2Method and apparatus for testing of the downhole connector electrical system during installationACCESSESP UK LTD·Filed 2023·Granted Apr 15, 2025·0 cites·19 claims
- 1570US11821266B2Method for testing of the downhole connector electrical system during installationACCESSESP UK LTD·Filed 2023·Granted Nov 21, 2023·0 cites·7 claims
- 1670US11572743B2Method and apparatus for testing of the downhole connector electrical system during installationACCESSESP UK LTD·Filed 2019·Granted Feb 7, 2023·2 cites·6 claims
- 1770US6789627B2Control line cutting tool and methodSCHLUMBERGER TECHNOLOGY CORP·Filed 2001·Granted Sep 14, 2004·36 cites·20 claims
- 1868US11293273B2Method and apparatus for downhole heatingACCESSESP UK LTD·Filed 2019·Granted Apr 5, 2022·1 cites·9 claims
- 1968US6732801B2Apparatus and method for completing a junction of plural wellboresSCHLUMBERGER TECHNOLOGY CORP·Filed 2002·Granted May 11, 2004·31 cites·31 claims
- 2068US6237683B1Wellbore flow control deviceCAMCO INT·Filed 1998·Granted May 29, 2001·41 cites·16 claims
- 2168US4976317AWell tool hydrostatic release meansCAMCO INT·Filed 1989·Granted Dec 11, 1990·36 cites·6 claims
- 2266US12345101B2System and method for well bore isolation of a retrievable motor assemblyACCESSESP UK LTD·Filed 2022·Granted Jul 1, 2025·0 cites·4 claims
- 2366US5101897ASlip mechanism for a well toolCAMCO INT·Filed 1991·Granted Apr 7, 1992·43 cites·2 claims
- 2463US6241015B1Apparatus for remote control of wellbore fluid flowCAMCO INT·Filed 1999·Granted Jun 5, 2001·43 cites·31 claims
- 2560US6712149B2Apparatus and method for spacing out of offshore wellsSCHLUMBERGER TECHNOLOGY CORP·Filed 2002·Granted Mar 30, 2004·21 cites·43 claims
- 2655US7543652B2Subsurface annular safety barrierSCHLUMBERGER TECHNOLOGY CORP·Filed 2006·Granted Jun 9, 2009·4 cites·6 claims
- 2754US11118404B2System and method for reverse Y-tool bypassACCESSESP UK LTD·Filed 2019·Granted Sep 14, 2021·0 cites·24 claims
- 2845US5348090AExpanded slip well anchorCAMCO INT·Filed 1993·Granted Sep 20, 1994·17 cites·13 claims
- 2944US10934789B2System and method for terminating cableACCESSESP UK LTD·Filed 2018·Granted Mar 2, 2021·0 cites·20 claims
- 3042US10530143B2Stress control cones for downhole electrical power system tubing encapsulated power cablesACCESSESP UK LTD·Filed 2018·Granted Jan 7, 2020·0 cites·38 claims
- 3137US2005161212A1System and Method for Utilizing Nano-Scale Filler in Downhole ApplicationsSCHLUMBERGER TECHNOLOGY CORP·Filed 2005·Application pending·0 cites
- 3236US7140447B2Subsurface annular safety barrierSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted Nov 28, 2006·1 cites·5 claims
- 3332US6209649B1Selective re-entry tool for multiple tubing completions and method of usingCAMCO INT·Filed 1999·Granted Apr 3, 2001·6 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →