Si richiedono prezzi delle seguenti punte a forare Tricone Drilling bit 12 1/4" dia for medium hard / soft formation Tricone Drilling bit 17 1/2" dia for medium hard / soft formation Tricone Drilling bit 12 1/4" dia for extremely hard formation (Button bit) Tricone Drilling bit 17 1/2" dia for extremely hard formation (Button bit) Tricone Drilling bit 10" dia for extremely hard formation (Button bit) Tricone Drilling bit 7 7/8" dia for extremely hard formation (Button bit) DTH bit with Hammer 10" dia DTH bit with Hammer 12" dia Drilling pipe 4 3/4" FJ 4 1/2" tool joint 6 M long