Inventor · Pearland, TX, US

Justin Kellner

42Patents
8h-index
33Co-inventors
71Inventor score

Filing activity: Dec 22, 2008 → Jun 14, 2021

Most-cited inventions

PatentTitleAreaCited byStatus
US9976381B2 Downhole tool with an expandable sleeve Fixed Constructions 59 Active
US7644772B2 Ball seat having segmented arcuate ball support member Fixed Constructions 56 Active
US9133671B2 Wireline supported bi-directional shifting tool with pumpdown feature Fixed Constructions 37 Active
US8555960B2 Pressure actuated ported sub for subterranean cement completions Fixed Constructions 21 Active
US9016388B2 Wiper plug elements and methods of stimulating a wellbore environment Fixed Constructions 20 Active
US10408012B2 Downhole tool with an expandable sleeve Fixed Constructions 15 Active
US9359865B2 Pressure actuated ported sub for subterranean cement completions Fixed Constructions 14 Active
US10156119B2 Downhole tool with an expandable sleeve Fixed Constructions 9 Active
US10683728B2 Float sub with pressure-frangible plug Fixed Constructions 8 Active
USRE46137E1 Pressure actuated ported sub for subterranean cement completions General 8 Active
US8662162B2 Segmented collapsible ball seat allowing ball recovery Fixed Constructions 8 Active
US11396787B2 Downhole tool with ball-in-place setting assembly and asymmetric sleeve Fixed Constructions 7 Active
US8910717B2 Frangible pressure control plug, actuatable tool including the plug, and method thereof Fixed Constructions 5 Active
US10920523B2 Ball drop wireline adapter kit Fixed Constructions 5 Active
US10422202B2 Linearly indexing wellbore valve Fixed Constructions 4 Active
US8365829B2 Tubular seat and tubular actuating system Mechanical Engineering; Lighting; Heating 4 Active
US11261683B2 Downhole tool with sleeve and slip Fixed Constructions 3 Active
US10337285B2 Time-delayed downhole tool Fixed Constructions 3 Active
US10829995B2 Downhole tool for generating vibration in a tubular Fixed Constructions 3 Active
US10174590B2 Toe valve Fixed Constructions 3 Active
US10718178B2 Packer with pivotable anti-extrusion elements Fixed Constructions 3 Active
US11454074B2 Back pressure valve Fixed Constructions 2 Active
USD916937S1 Downhole tool including a swage General 2 Active
US10119360B2 Slip segment for a downhole tool Performing Operations; Transporting 2 Active
US11125039B2 Deformable downhole tool with dissolvable element and brittle protective layer Fixed Constructions 2 Active

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