the housing via a bushing or locking ring that match a profile on the inner surface of the segmented tube to lockingly engage the bushing and segmented tube retain a lower inner seal in place and support an upper inner seal the segmented design of the segmented tube allows for smaller diameter members to be used and minimizes leak paths application_number US 201113281526 A description fig1 shows a partial sectional view of an embodiment of a seal assembly 10 of the invention installed between an outer member 12 and an inner member 14 in this embodiment outer member 12 may be a valve bonnet alternatively outer member may also be a wellhead housing or other type of housing where a seal assembly 10 could be used in this embodiment inner member 14 may be a valve stem alternatively inner member 14 may also be a hanger such as a casing hanger referring to fig2 an enlarged sectional view of the seal assembly 10 of fig1 is shown in this embodiment outer member or bonnet 12 has a bore 13 that may slidingly engage an outer surface 15 of the inner member or valve stem 14 o ring type seal 20 is located at an interface between outer member 12 and an outer surface of seal assembly 10 further o ring type seal 22 is located at an interface between upper member 16 and an outer surface of seal assembly 10 an additional seal 24 is located at a top portion of the outer member 12 seals 20 22 24 provide sealing at leak paths created by interfaces between parts a locking device 30 is located at an interface between bore 13 of outer member and outer surface 15.