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national coupling company | 287 |
hunting energy services | 12 |
national coupling company | 47 |
national coupling company | 47 |
Title of patent family (most common patent title) |
Family members |
Filing year |
---|---|---|
forbedret dummy undersjøisk hydraulisk koplingselement | 20 | 2012 |
improved pressure-energized probe seal for female hydraulic coupling member | 17 | 2008 |
method for autonomous control of a chemical injection system for oil and gas wells | 16 | 2007 |
probe seal having pressure-energized sealing elements for female hydraulic coupling memb… 🛈 | 16 | 2008 |
method and apparatus for piston-actuated elastomer probe seal in a hydraulic coupling me… 🛈 | 15 | 2008 |
subsea bop control system with dual-action check valve | 14 | 2015 |
metal reinforced seal plate for pilot actuated spool valve | 14 | 2012 |
hydraulic coupling member with pressure-relieving poppet valve | 11 | 2011 |
hydraulic coupling with smooth bore poppet valve | 10 | 2008 |
fault-tolerant chemical injection system for oil and gas wells | 10 | 2008 |