Inventor · disambiguated record
Daniel George Purkis
Also filed as: PURKIS DANIEL · PURKIS DANIEL G · PURKIS DANIEL GEORGE
60 granted patents·9 pending applications·980 citations·filing 1998–2022
98Inventor score
Files withWEATHERFORD TECH HOLDINGS LLC17PETROWELL LTD16PURKIS DANIEL10WELL SENSE TECH LIMITED9WEATHERFORD UK LTD6
Top patents by PatentIndex Score
69 records- 0197US6273189B1Downhole tractorHALLIBURTON ENERGY SERV INC·Filed 1999·Granted Aug 14, 2001·296 cites·76 claims
- 0296US8833469B2Method of and apparatus for completing a wellPURKIS DANIEL·Filed 2008·Granted Sep 16, 2014·59 cites·29 claims
- 0395US10018015B2Downhole apparatus and methodWEATHERFORD TECH HOLDINGS LLC·Filed 2015·Granted Jul 10, 2018·18 cites·30 claims
- 0493US11168543B2Optical fibre deploymentWELL SENSE TECH LIMITED·Filed 2017·Granted Nov 9, 2021·8 cites·19 claims
- 0592US11761282B2Through-bore spool apparatusWELL SENSE TECH LIMITED·Filed 2022·Granted Sep 19, 2023·2 cites·20 claims
- 0691US8701776B2Downhole actuating apparatusPETROWELL LTD·Filed 2012·Granted Apr 22, 2014·14 cites·56 claims
- 0789US11346172B2Through-bore spool apparatusWELL SENSE TECH LIMITED·Filed 2019·Granted May 31, 2022·4 cites·19 claims
- 0889US9488046B2Apparatus and method for downhole communicationPURKIS DANIEL·Filed 2010·Granted Nov 8, 2016·14 cites·29 claims
- 0989US6585051B2Hydraulically operated fluid metering apparatus for use in a subterranean well, and associated methodsWELLDYNAMICS INC·Filed 2001·Granted Jul 1, 2003·93 cites·48 claims
- 1089US6575237B2Hydraulic well control systemWELLDYNAMICS INC·Filed 1999·Granted Jun 10, 2003·113 cites·23 claims
- 1187US9416643B2Selective fracturing systemPETROWELL LTD·Filed 2013·Granted Aug 16, 2016·11 cites·19 claims
- 1287US6567013B1Digital hydraulic well control systemHALLIBURTON ENERGY SERV INC·Filed 2000·Granted May 20, 2003·68 cites·45 claims
- 1387US6179052B1Digital-hydraulic well control systemHALLIBURTON ENERGY SERV INC·Filed 1998·Granted Jan 30, 2001·97 cites·23 claims
- 1485US11851964B2Fibre spooling apparatusWELL SENSE TECH LIMITED·Filed 2020·Granted Dec 26, 2023·2 cites·16 claims
- 1585US10428621B2ChokeWEATHERFORD TECH HOLDINGS LLC·Filed 2014·Granted Oct 1, 2019·7 cites·27 claims
- 1685US10041335B2Switching device for, and a method of switching, a downhole toolWEATHERFORD TECH HOLDINGS LLC·Filed 2017·Granted Aug 7, 2018·2 cites·6 claims
- 1783US11469823B2Optical communication systemWELL SENSE TECH LIMITED·Filed 2019·Granted Oct 11, 2022·3 cites·14 claims
- 1883US10519747B2Pressure operated valve assemblyWEATHERFORD UK LTD·Filed 2015·Granted Dec 31, 2019·4 cites·27 claims
- 1982US11161712B2Optical fibre spoolWELL SENSE TECH LIMITED·Filed 2018·Granted Nov 2, 2021·2 cites·27 claims
- 2082US10053958B2Downhole apparatus and methodWEATHERFORD TECH HOLDINGS LLC·Filed 2015·Granted Aug 21, 2018·3 cites·26 claims
- 2180US10087725B2Telemetry operated tools for cementing a liner stringWEATHERFORD TECH HOLDINGS LLC·Filed 2014·Granted Oct 2, 2018·7 cites·24 claims
- 2279US9359890B2Method of and apparatus for completing a wellPETROWELL LTD·Filed 2015·Granted Jun 7, 2016·2 cites·31 claims
- 2378US9115573B2Remote actuation of a downhole toolPURKIS DANIEL·Filed 2005·Granted Aug 25, 2015·19 cites·32 claims
- 2474US11156078B2Downhole communicationWEATHERFORD TECH HOLDINGS LLC·Filed 2018·Granted Oct 26, 2021·1 cites·18 claims
- 2574US7798208B2Wellhead assembly and methodPETROWELL LTD·Filed 2006·Granted Sep 21, 2010·14 cites·38 claims
- 2673US10287852B2Method and apparatus for actuating downhole toolsWEATHERFORD TECH HOLDINGS LLC·Filed 2014·Granted May 14, 2019·3 cites·95 claims
- 2773US7013980B2Hydraulically actuated control system for use in a subterranean wellWELLDYNAMICS INC·Filed 2003·Granted Mar 21, 2006·39 cites·29 claims
- 2871US10753177B2Method and apparatus for actuating downhole toolsWEATHERFORD TECH HOLDINGS LLC·Filed 2018·Granted Aug 25, 2020·1 cites·37 claims
- 2971US7145471B2Sequential hydraulic control system for use in a subterranean wellWELLDYNAMICS INC·Filed 2000·Granted Dec 5, 2006·31 cites·25 claims
- 3070US12487104B2Method, device and system for range findingWELL SENSE TECH LIMITED·Filed 2021·Granted Dec 2, 2025·0 cites·20 claims
- 3169US12009863B2Optical communication systemWELL SENSE TECH LIMITED·Filed 2022·Granted Jun 11, 2024·0 cites·13 claims
- 3269US11879312B2ScreensWEATHERFORD UK LTD·Filed 2021·Granted Jan 23, 2024·0 cites·21 claims
- 3369US9739127B2Method and system for operating a downhole tool, for fracturing a formation and/or for completing a wellborePETROWELL LTD·Filed 2013·Granted Aug 22, 2017·3 cites·39 claims
- 3467US10077633B2Downhole apparatus and methodWEATHERFORD TECH HOLDINGS LLC·Filed 2015·Granted Sep 18, 2018·1 cites·35 claims
- 3567US9945211B2Leak-off assembly for gravel pack systemMCNAMEE STEPHEN·Filed 2015·Granted Apr 17, 2018·2 cites·27 claims
- 3667US9103197B2Switching device for, and a method of switching, a downhole toolPURKIS DANIEL·Filed 2009·Granted Aug 11, 2015·7 cites·18 claims
- 3765US8191570B2Bi-directional flapper valvePURKIS DANIEL·Filed 2007·Granted Jun 5, 2012·8 cites·20 claims
- 3864US8490691B2PlugPURKIS DANIEL·Filed 2005·Granted Jul 23, 2013·7 cites·23 claims
- 3962US10753196B2Downhole communicationWEATHERFORD TECH HOLDINGS LLC·Filed 2019·Granted Aug 25, 2020·0 cites·13 claims
- 4062US9194197B2Mechanical counterPETROWELL LTD·Filed 2012·Granted Nov 24, 2015·2 cites·24 claims
- 4161US10724333B2ChokeWEATHERFORD TECH HOLDINGS LLC·Filed 2019·Granted Jul 28, 2020·0 cites·16 claims
- 4261US9085954B2Method of and apparatus for completing a wellPETROWELL LTD·Filed 2013·Granted Jul 21, 2015·1 cites·9 claims
- 4360US10883343B2Downhole screen assemblyWEATHERFORD UK LTD·Filed 2019·Granted Jan 5, 2021·0 cites·13 claims
- 4460US9194227B2Systems, assemblies and processes for controlling tools in a wellboreSNIDER PHILIP M·Filed 2008·Granted Nov 24, 2015·5 cites·45 claims
- 4559US10890053B2ScreensWEATHERFORD UK LTD·Filed 2018·Granted Jan 12, 2021·0 cites·19 claims
- 4659US8839872B2Tree plugPURKIS DANIEL·Filed 2007·Granted Sep 23, 2014·4 cites·62 claims
- 4758US2018306003A1Downhole apparatus and methodWEATHERFORD TECH HOLDINGS LLC·Filed 2018·Application pending·0 cites
- 4857US9631458B2Switching device for, and a method of switching, a downhole toolPETROWELL LTD·Filed 2015·Granted Apr 25, 2017·0 cites·26 claims
- 4955US10808508B2Telemetry operated tools for cementing a liner stringWEATHERFORD TECH HOLDINGS LLC·Filed 2018·Granted Oct 20, 2020·0 cites·20 claims
- 5054US2019010803A1Wellbore devices and methodsWELL SENSE TECH LIMITED·Filed 2016·Application pending·0 cites
Showing the top 50 of 69 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →