Inventor · disambiguated record
Donald H. Perkins
Also filed as: PERKINS DONALD · PERKINS DONALD H · PERKINS DONALD HERBERT
18 granted patents·787 citations·filing 1982–2014
96Inventor score
Files withOTIS ENG CO10HALLIBURTON ENERGY SERV INC2WRIGHT ADAM D2HALLIBURTON ENERGY SERVICES INC1RINGGENBERG PAUL D1
Top patents by PatentIndex Score
18 records- 0195US8322426B2Downhole actuator apparatus having a chemically activated triggerWRIGHT ADAM·Filed 2010·Granted Dec 4, 2012·76 cites·20 claims
- 0293US7458273B2Fiber optic differential pressure sensorWELLDYNAMICS B V·Filed 2006·Granted Dec 2, 2008·28 cites·13 claims
- 0393US4981173AElectric surface controlled subsurface valve systemOTIS ENG CO·Filed 1989·Granted Jan 1, 1991·119 cites·28 claims
- 0489US5293551AMonitor and control circuit for electric surface controlled subsurface valve systemOTIS ENG CO·Filed 1992·Granted Mar 8, 1994·127 cites·29 claims
- 0588US8235103B2Well tools incorporating valves operable by low electrical power inputWRIGHT ADAM D·Filed 2009·Granted Aug 7, 2012·27 cites·8 claims
- 0687US4886114AElectric surface controlled subsurface valve systemOTIS ENG CO·Filed 1988·Granted Dec 12, 1989·81 cites·44 claims
- 0785US4798247ASolenoid operated safety valve and submersible pump systemOTIS ENG CO·Filed 1987·Granted Jan 17, 1989·69 cites·33 claims
- 0883US5275038ADownhole reeled tubing inspection system with fiberoptic cableOTIS ENG CO·Filed 1991·Granted Jan 4, 1994·93 cites·28 claims
- 0977US10006270B2Subsea mechanism to circulate fluid between a riser and tubing stringHALLIBURTON ENERGY SERVICES INC·Filed 2014·Granted Jun 26, 2018·5 cites·22 claims
- 1076US9593546B2Well tools incorporating valves operable by low electrical power inputWRIGHT ADAM D·Filed 2012·Granted Mar 14, 2017·4 cites·10 claims
- 1176US7159468B2Fiber optic differential pressure sensorHALLIBURTON ENERGY SERV INC·Filed 2004·Granted Jan 9, 2007·15 cites·68 claims
- 1270US4582134AWell packerOTIS ENG CO·Filed 1984·Granted Apr 15, 1986·34 cites·9 claims
- 1367US5070595AMethod for manufacturing electrIc surface controlled subsurface valve systemOTIS ENG CO·Filed 1990·Granted Dec 10, 1991·46 cites·8 claims
- 1462US4512399AWell packerOTIS ENG CO·Filed 1983·Granted Apr 23, 1985·27 cites·14 claims
- 1555US4413677ADual string well packerOTIS ENG CO·Filed 1982·Granted Nov 8, 1983·21 cites·16 claims
- 1654US8960998B2System and method of mixing a formation fluid sample in a downhole sampling chamber with a magnetic mixing elementHALLIBURTON ENERGY SERV INC·Filed 2013·Granted Feb 24, 2015·0 cites·17 claims
- 1744US4738431ABall valve structureOTIS ENG CO·Filed 1986·Granted Apr 19, 1988·15 cites·28 claims
- 1843US8997881B2Pressure bearing wall and support structure thereforRINGGENBERG PAUL D·Filed 2010·Granted Apr 7, 2015·0 cites·23 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →