SYSTEM-A CORE BARREL
Besson metric system-a corebarrels are manufactued from “a” size to “h” size by usıng core barrel heads, tubes, reaming shells, core lifter cases and core lifters produced under iso 3551-1 iso standart.
System-A core barrel AWM, AWG, BWM, BWG, NWM, NWG, HWG are manufactured as.
SYSTEM-B CORE BARREL
Besson metric system-b corebarrels are manufactued from 46 mm size to 101 mm size by using core barrel heads, tubes, reaming shells, core lifter cases, core lifters and extension tubes produced according to iso 3552-1 iso stan¬dart for both “t” and “b” type.
System-B core barrel T46, B46, T56, B56, T66, B66, T76, B76, T86, B86, T101, B101 are manufactured as.