FREUDENBERG OIL & GAS, LLC Patent applications |
Patent application number | Title | Published |
20140060805 | Fluid Seal with Swellable Material Packing - The present disclosure provides a casing seal for a wellhead, including a casing with an internal surface having an annular groove therein. A fluid seal is disposed in the annular groove and includes an internal bead for sealing against a cylindrical surface of an inner case or tube. A swellable material is disposed within the annular groove and surrounds the fluid seal. An energizing port is in communication with the annular groove for delivering fluid to the swellable material to cause the swellable material to expand and further load the fluid seal. | 03-06-2014 |
20110260411 | Unitized Bi-Directional Seal Assembly - A seal assembly is provided including a pair of end rings axially spaced from one another. A pair of annular seals are each engaged with a respective one of the pair of end rings. A locking ring is engaged with each of the pair of annular seals to connect the opposing end rings and annular seals in a unitized bi-directional seal assembly. | 10-27-2011 |