US Patent 10053946 Full bore compression sealing method

An annular seal, in certain embodiments, includes a top seal section, a bottom seal section, and a core seal section including non-orthogonal top and bottom faces relative to a radial axis of the core seal section disposed between the top seal section and the bottom seal section. The core seal section is configured to expand radially when an axial load is applied to the top and bottom faces of the core seal section such that the top and bottom faces are deformed into an orthogonal alignment relative to the radial axis of the core seal section.