Fluid packing assembly with alternating diverse seal ring elements

Abstract From the Canadian patent

A fluid packing comprises a stacked assembly of V-ring seal elements, special backup/energizing rings interspersed between the seal elements and a spring energized lip seal ring that is retained in functional position by an adapter ring having a generally T-shaped cross-sectional configuration. This assembly is radially compressed to establish an initial seal between the stem or screw in the chamber wall when installed in a stem packing chamber of the valve or choke or in a packing chamber of a wellhead lockdown screw. The assembly is capable of creating additional compression and deformation to fill annular spaces that may exist between the seal elements when the assembly is subjected to …