Inventor · disambiguated record
Chidirim Enoch Ejim
Also filed as: EJIM CHIDIRIM ENOCH
43 granted patents·10 pending applications·122 citations·filing 2015–2024
96Inventor score
Top patents by PatentIndex Score
53 records- 0197US11525348B2Downhole solids handling in wellsSAUDI ARABIAN OIL CO·Filed 2020·Granted Dec 13, 2022·7 cites·13 claims
- 0297US10378322B2Prevention of gas accumulation above ESP intake with inverted shroudSAUDI ARABIAN OIL CO·Filed 2017·Granted Aug 13, 2019·25 cites·14 claims
- 0397US10287853B2Well debris handling systemSAUDI ARABIAN OIL CO·Filed 2017·Granted May 14, 2019·13 cites·18 claims
- 0497US10138885B2Equal-walled gerotor pump for wellbore applicationsSAUDI ARABIAN OIL CO·Filed 2016·Granted Nov 27, 2018·10 cites·21 claims
- 0595US11851974B1Resettable packer system for pumping operationsSAUDI ARABIAN OIL CO·Filed 2022·Granted Dec 26, 2023·4 cites·20 claims
- 0695US10941778B2Motorized pumpSAUDI ARABIAN OIL CO·Filed 2020·Granted Mar 9, 2021·5 cites·34 claims
- 0795US10533558B2Centrifugal pump with adaptive pump stagesSAUDI ARABIAN OIL CO·Filed 2017·Granted Jan 14, 2020·11 cites·22 claims
- 0894US10947813B2Systems and methods for preventing sand accumulation in inverted electric submersible pumpSAUDI ARABIAN OIL CO·Filed 2018·Granted Mar 16, 2021·11 cites·23 claims
- 0994US10337312B2Electrical submersible pumping system with separatorSAUDI ARABIAN OIL CO·Filed 2017·Granted Jul 2, 2019·9 cites·17 claims
- 1093US10844701B2Balancing axial thrust in submersible well pumpsSAUDI ARABIAN OIL CO·Filed 2019·Granted Nov 24, 2020·5 cites·14 claims
- 1193US10578111B2Wellbore debris handler for electric submersible pumpsSAUDI ARABIAN OIL CO·Filed 2017·Granted Mar 3, 2020·9 cites·19 claims
- 1292US11268520B2Centrifugal pump with adaptive pump stagesSAUDI ARABIAN OIL CO·Filed 2020·Granted Mar 8, 2022·3 cites·9 claims
- 1388US11773703B2Anti-backspin device for electrical submersible pumpsSAUDI ARABIAN OIL CO·Filed 2021·Granted Oct 3, 2023·2 cites·18 claims
- 1487US10927643B2Operating a subsurface safety valve using a downhole pumpSAUDI ARABIAN OIL CO·Filed 2019·Granted Feb 23, 2021·4 cites·25 claims
- 1585US11661809B2Logging a wellSAUDI ARABIAN OIL CO·Filed 2020·Granted May 30, 2023·2 cites·26 claims
- 1682US11965396B1Thrust force to operate control valveSAUDI ARABIAN OIL CO·Filed 2022·Granted Apr 23, 2024·1 cites·20 claims
- 1779US11268519B2Centrifugal pump with adaptive pump stagesSAUDI ARABIAN OIL CO·Filed 2020·Granted Mar 8, 2022·1 cites·20 claims
- 1874US11767741B2Motorized pumpSAUDI ARABIAN OIL CO·Filed 2022·Granted Sep 26, 2023·0 cites·20 claims
- 1973US11788391B2Motorized pumpSAUDI ARABIAN OIL CO·Filed 2021·Granted Oct 17, 2023·0 cites·14 claims
- 2071US11988082B2Downhole solids handling in wellsSAUDI ARABIAN OIL CO·Filed 2022·Granted May 21, 2024·0 cites·5 claims
- 2169US11686312B2Balancing axial thrust in submersible well pumpsSAUDI ARABIAN OIL CO·Filed 2021·Granted Jun 27, 2023·0 cites·9 claims
- 2267US11359472B2Balancing axial thrust in submersible well pumpsSAUDI ARABIAN OIL CO·Filed 2020·Granted Jun 14, 2022·0 cites·11 claims
- 2364US2020056462A1Motorized pumpSAUDI ARABIAN OIL CO·Filed 2018·Application pending·0 cites
- 2463US12398617B1Gas-activated vent valve below packer for stable electrical submersible pump (ESP) operation in gassy wellsSAUDI ARABIAN OIL CO·Filed 2024·Granted Aug 26, 2025·0 cites·20 claims
- 2563US2020056615A1Motorized pumpSAUDI ARABIAN OIL CO·Filed 2018·Application pending·0 cites
- 2662US10794151B2Well debris handling systemSAUDI ARABIAN OIL CO·Filed 2019·Granted Oct 6, 2020·0 cites·16 claims
- 2762US10711575B2Well debris handling systemSAUDI ARABIAN OIL CO·Filed 2019·Granted Jul 14, 2020·0 cites·14 claims
- 2861US12473805B2Inverted shroud field assembly for gas accumulation prevention above ESPs and method of useSAUDI ARABIAN OIL CO·Filed 2023·Granted Nov 18, 2025·0 cites·10 claims
- 2961US12258838B2Flow regulating valveSAUDI ARABIAN OIL CO·Filed 2022·Granted Mar 25, 2025·0 cites·20 claims
- 3060US2025283396A1Re-start of well after a well kill operationSAUDI ARABIAN OIL CO·Filed 2024·Application pending·0 cites
- 3158US11326607B2Balancing axial thrust in submersible well pumpsSAUDI ARABIAN OIL CO·Filed 2019·Granted May 10, 2022·0 cites·5 claims
- 3257US11486218B1Split riser lubricator to reduce lifting heights during tool installation and retrievalSAUDI ARABIAN OIL CO·Filed 2021·Granted Nov 1, 2022·0 cites·19 claims
- 3355US12055021B2Sand shield for protecting inverted electric submersible pump at shutdownSAUDI ARABIAN OIL CO·Filed 2022·Granted Aug 6, 2024·0 cites·20 claims
- 3454US12091961B2Methods and systems for a downhole sand level deviceSAUDI ARABIAN OIL CO·Filed 2022·Granted Sep 17, 2024·0 cites·20 claims
- 3554US11091988B2Downhole system and method for selectively producing and unloading from a wellSAUDI ARABIAN OIL CO·Filed 2019·Granted Aug 17, 2021·0 cites·19 claims
- 3653US11767850B2Electrical submersible pump with liquid-gas homogenizerSAUDI ARABIAN OIL CO·Filed 2020·Granted Sep 26, 2023·0 cites·23 claims
- 3751US12276184B1Reviving a well using through-tubing cable-deployed pumpSAUDI ARABIAN OIL CO·Filed 2023·Granted Apr 15, 2025·0 cites·23 claims
- 3851US12012831B2Solids bypass device for inverted electric submersible pumpSAUDI ARABIAN OIL CO·Filed 2022·Granted Jun 18, 2024·0 cites·20 claims
- 3951US11913321B2Downhole gas-liquid separatorSAUDI ARABIAN OIL CO·Filed 2022·Granted Feb 27, 2024·0 cites·10 claims
- 4051US11566507B2Through-tubing simultaneous gas and liquid production method and systemSAUDI ARABIAN OIL CO·Filed 2020·Granted Jan 31, 2023·0 cites·16 claims
- 4150US12196050B2Logging a deviated or horizontal wellSAUDI ARABIAN OIL CO·Filed 2022·Granted Jan 14, 2025·0 cites·16 claims
- 4250US11499563B2Self-balancing thrust diskUNIV KING FAHD PET & MINERALS·Filed 2020·Granted Nov 15, 2022·0 cites·19 claims
- 4349US12044101B2Method and system for power generation and useSAUDI ARABIAN OIL CO·Filed 2022·Granted Jul 23, 2024·0 cites·22 claims
- 4447US11215032B2Devices and methods to mitigate pressure buildup in an isolated wellbore annulusSAUDI ARABIAN OIL CO·Filed 2020·Granted Jan 4, 2022·0 cites·20 claims
- 4547US2025060078A1Pressure boosting system for multi-phase crude oilSAUDI ARABIAN OIL CO·Filed 2022·Application pending·0 cites
- 4646US11591899B2Wellbore density meter using a rotor and diffuserSAUDI ARABIAN OIL CO·Filed 2021·Granted Feb 28, 2023·0 cites·28 claims
- 4745US2018172020A1Wellbore tools including smart materialsSAUDI ARABIAN OIL CO·Filed 2017·Application pending·0 cites
- 4845US2019234209A1Measuring fluid density in a fluid flowSAUDI ARABIAN OIL CO·Filed 2018·Application pending·0 cites
- 4945US2019085667A1Electric submersible pump configurationSAUDI ARABIAN OIL CO·Filed 2017·Application pending·0 cites
- 5044US10989025B2Prevention of gas accumulation above ESP intakeSAUDI ARABIAN OIL CO·Filed 2017·Granted Apr 27, 2021·0 cites·21 claims
Showing the top 50 of 53 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →