Inventor · Katy, TX, US

Robert S. O'Brien

57Patents
11h-index
52Co-inventors
81Inventor score

Filing activity: Jun 21, 2000 → Feb 20, 2020

Most-cited inventions

PatentTitleAreaCited byStatus
US6371208B1 Variable downhole choke Fixed Constructions 45 Expired
US7644854B1 Bead pack brazing with energetics Fixed Constructions 37 Active
US8291982B2 Multi-position valve for fracturing and sand control and associated completion methods Fixed Constructions 23 Active
US7585002B2 Expandable tubular connection Mechanical Engineering; Lighting; Heating 19 Expired
US7971646B2 Multi-position valve for fracturing and sand control and associated completion methods Fixed Constructions 19 Active
US7552768B2 Swelling packer element with enhanced sealing force Fixed Constructions 16 Active
US9879501B2 Multizone retrieval system and method Fixed Constructions 14 Active
US7681652B2 Packer setting device for high-hydrostatic applications Fixed Constructions 14 Active
US8171994B2 Multi-position valve for fracturing and sand control and associated completion methods Fixed Constructions 13 Active
US7757758B2 Expandable wellbore liner Fixed Constructions 13 Active
US7891434B2 Packer setting device for high hydrostatic applications Fixed Constructions 12 Active
US9334702B2 Selectively disengagable sealing system Fixed Constructions 11 Active
US7096938B2 Slip energized by longitudinal shrinkage Fixed Constructions 10 Expired
US7708060B2 One trip cemented expandable monobore liner system and method Emerging Cross-Sectional Technologies 9 Active
US8201623B2 Reduced wear position indicating subterranean tool Fixed Constructions 8 Active
US7380604B2 One trip cemented expandable monobore liner system and method Fixed Constructions 8 Expired
US7370699B2 One trip cemented expandable monobore liner system and method Fixed Constructions 6 Expired
US7458422B2 One trip cemented expandable monobore liner system and method Fixed Constructions 6 Active
US10253594B2 Interventionless pressure operated sliding sleeve Fixed Constructions 5 Active
US7255176B2 Method for reducing diameter reduction near ends of expanded tubulars Fixed Constructions 5 Expired
US7367390B2 Slip energized by longitudinal shrinkage Fixed Constructions 4 Active
US7987905B2 One trip cemented expandable monobore liner system and method Emerging Cross-Sectional Technologies 3 Active
US8393396B2 Subterranean valve operated by string relative movement Fixed Constructions 2 Active
US8104505B2 Two-way actuator and method Emerging Cross-Sectional Technologies 2 Active
US9574408B2 Wellbore strings containing expansion tools Fixed Constructions 2 Active

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