Umzimba okanye i-mandrel:
I-Mandrel iyona nxalenye ephambili ye-packer equlethe uxhulumaniso lokugqibela kwaye ibonelela nge-conduit nge-packer. Iphantsi kokuvezwa ngokuthe ngqo kulwelo oluqukuqelayo yiloo nto ukukhetha kwayo imathiriyeli kusisigqibo esibaluleke kakhulu. Eyona nto isetyenziswayo yi-L80 Type 1, 9CR, 13CR, 9CR1Mo.