Inventor · Tulsa, OK, US

Robert Charles De Long

23Patents
3h-index
23Co-inventors
63Inventor score

Filing activity: Feb 6, 1997 → Sep 28, 2023

Most-cited inventions

PatentTitleAreaCited byStatus
US5957656A Pump mounted thrust bearing Mechanical Engineering; Lighting; Heating 21 Expired
US5779434A Pump mounted thrust bearing Mechanical Engineering; Lighting; Heating 16 Expired
USRE43363E1 Abrasion resistant pump thrust bearing General 4 Active
US11066921B1 Fluid flow condition sensing probe Fixed Constructions 2 Active
US11460038B2 Hybrid magnetic radial bearing in an electric submersible pump (ESP) assembly Mechanical Engineering; Lighting; Heating 2 Active
US8887802B2 Torque absorbtion anchor system and method to assemble same Emerging Cross-Sectional Technologies 1 Active
US11739617B2 Shielding for a magnetic bearing in an electric submersible pump (ESP) assembly Mechanical Engineering; Lighting; Heating 1 Active
US11162348B2 Methods to improve fluid flow of a multi-phase mixture, methods to separate fluids of a multi-phase mixture, and multi-phase fluid mixture systems Fixed Constructions 1 Active
US11512707B2 Hybrid magnetic thrust bearing in an electric submersible pump (ESP) assembly Mechanical Engineering; Lighting; Heating 1 Active
US11220904B2 Fluid flow condition sensing probe Fixed Constructions 1 Active
US12129747B2 Hybrid permanent magnet motor Electricity 1 Active
US12424844B2 Current-controlled circuit breaker for electrical submersible pump motor leads Electricity 0 Active
US12281654B2 Permanent magnet motor Electricity 0 Active
US11828136B2 Wax removal in a production line Fixed Constructions 0 Active
US12385770B2 System and method of determining reservoir fluid flow condition and composition downhole Physics 0 Active
US11746641B2 Methods to improve fluid flow of a multi-phase mixture, methods to separate fluids of a multiphase mixture, and multi-phase fluid mixture systems Fixed Constructions 0 Active
US11916450B2 Axial flux submersible electric motor Electricity 0 Active
US12158157B2 Shielding for a magnetic bearing in an electric submersible pump (ESP) assembly Mechanical Engineering; Lighting; Heating 0 Active
US12331641B2 Pulsed-power drilling system with integrated power and communication coiled tubing conveyance Fixed Constructions 0 Active
US11378474B2 Predict brake horsepower for a pump for viscous applications Mechanical Engineering; Lighting; Heating 0 Active
US11739619B2 Oil circulation in an electric submersible pump (ESP) electric motor Mechanical Engineering; Lighting; Heating 0 Active
US11391096B2 Inductive coupling for electric power transfer to electric submersible motor Electricity 0 Active
US11916451B2 Axial flux submersible electric motor Electricity 0 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.