Patent assignee · DK · COMPANY

WELLTEC A/S

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118Patents
117Active
118Granted
61Portfolio score

Filing activity: Oct 24, 2002 → Jun 28, 2024 · 4 expiring within 5 years

Most-cited patents

PatentTitleAreaCited byStatus
US9206645B2 Navigation system Fixed Constructions 35 Active
US9458687B2 Stimulation method Fixed Constructions 33 Active
US9328577B2 Wireless downhole unit Fixed Constructions 19 Active
US9726005B2 Positioning method and tool for determining the position of the tool in a casing downhole Physics 15 Active
US9359884B2 Positioning tool Physics 13 Active
US9145761B2 Subsea well intervention module Fixed Constructions 8 Active
US9353607B2 Inflow control in a production casing Fixed Constructions 7 Active
US9206666B2 Annular barrier with external seal Fixed Constructions 6 Active
US9080415B2 Annular barrier and annular barrier system Fixed Constructions 6 Active
US9725980B2 Annular barrier with pressure amplification Fixed Constructions 5 Active
US9518439B2 Annular barrier with a self-actuated device Fixed Constructions 5 Active
US9359860B2 Annular barrier Fixed Constructions 4 Active
US8316965B2 Drilling tool with fluid cleaner Fixed Constructions 4 Active
US9926773B2 Expandable drop device Fixed Constructions 4 Active
US10724328B2 Downhole tool string for plug and abandonment by cutting Mechanical Engineering; Lighting; Heating 3 Active
US9447651B2 Sealing system Fixed Constructions 3 Active
US9708862B2 Annular barrier with axial force mechanism Fixed Constructions 3 Active
US9359869B2 Stimulation method Fixed Constructions 3 Active
US11542810B2 Downhole tool for determining laterals Fixed Constructions 3 Active
US9127533B2 Well completion Fixed Constructions 3 Active
US10337323B2 Dual function downhole tool Fixed Constructions 3 Active
US10267144B2 Downhole sensor system Fixed Constructions 2 Active
US10526845B2 Downhole tool string Fixed Constructions 2 Active
US10316602B2 Downhole machining system and method Performing Operations; Transporting 2 Active
US7588084B2 Method for releasing cables from an attached well tool and apparatus for exercising the method Fixed Constructions 2 Expired

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.