Abstract: A seal is formed from one or more elastomeric materials having a low glass transition temperature for high pressure, and both high and low temperature sealing applications. In an exemplary embodiment, the glass transition temperature (Tg) of the material may be ?35° C. or lower. The seal is adapted to repeatedly form and maintain a seal across a temperature range from 0° C. or lower to +122° C. or greater at pressures up to 15,000 p.s.i.g. or greater. The invention has numerous applications, such as for land-based use, marine surface and marine subsea uses. An anti-extrusion device may circumscribe the upper and lower edges of the material body. The invention also comprises fabrication methods for elastomer or polymeric seals.

Abstract: A diverter body having an upper portion, a central portion and a lower portion is secured to the upper end of a riser and lands in a housing. The central portion has lateral flow openings that axially align with a lateral flowline outlet in the housing. A pair of identical gallery seals locate above and below the lateral flowline outlet. The upper gallery seal is located between the upper portion, the central portion and the housing. The upper gallery seal has upper and lower metal rings and a central elastomer sandwiched therebetween. An outer diameter of the elastomer seals against the housing bore. The rings are symmetric and are mated to the elastomer along interfaces which are S-shaped in cross-section to form shoulders. The shoulders face radially inward. An annular cavity and a pair of flexible annular lips are formed along the inner diameter portion of the elastomer. A passage extends through the diverter bodies and communicates with the cavity.

Abstract: A diverter body having an upper portion, a central portion and a lower portion is secured to the upper end of a riser and lands in a housing. The central portion has lateral flow openings that axially align with a lateral flowline outlet in the housing. A pair of identical gallery seals locate above and below the lateral flowline outlet. The upper gallery seal is located between the upper portion, the central portion and the housing. The upper gallery seal has upper and lower metal rings and a central elastomer sandwiched therebetween. An outer diameter of the elastomer seals against the housing bore. The rings are symmetric and are mated to the elastomer along interfaces which are S-shaped in cross-section to form shoulders. The shoulders face radially inward. An annular cavity and a pair of flexible annular lips are formed along the inner diameter portion of the elastomer. A passage extends through the diverter bodies and communicates with the cavity.