and housing 42 define chamber 82 which is in communication with interior volume 50 via fluid passageway 84 in housing 42 fluid pressure from inside interior volume 50 enters chamber 82 downwardly urging floating piston 80 floating piston 80 is downwardly urged due to the difference between the hydraulic force exerted on surface 86 and the hydraulic force exerted on surface 88 surface 86 extends between inner diameter 90 of floating piston 80 and outer diameter 92 of housing 42 surface 88 extends between inner diameter 90 of floating piston 80 and outer diameter 94 of housing 42 which is greater than outer diameter 92 of housing 42 floating piston 80 downwardly urges seal assembly 72 to stretch seal assembly 72 and to further ensure that seal element 74 and seal element 78 do not interfere with the drilling operation above and below chamber 82 and between floating piston 80 and housing 84 are annular seals 96 such as o rings even though fig3 shows seal assembly 72 as sliding axially relative to housing 42 it should be understood by one skilled in the art that seal assembly 72 may slide rotatably about housing 42 probe 52 may be inserted into interior volume 50 as shown in fig2 after probe 52 is inserted into mandrel 44 the fluid pressure within interior volume 50 downwardly urges mandrel 44 as mandrel 44 slides downward relative to housing 42 fluid port 98 of mandrel 44 aligns with fluid passageway 100 of housing 42 allowing fluid pressure from interior volume 50 to inflate seal element 74 by traveling between seal assembly 72 and housing 42 fluid pressure from interior volume 50 also travels through fluid passageway 102 in floating member 76 in order to inflate seal element 78 once seal element 74 and seal.