... TimeAccording to the amount of your requirementCangzhou Great Drill Co., Ltd specializes in drill bits, tricone bits, pdc bits bit size ... 3 7/8"to 26", cover most of IADC codes. Drill pipe, Mud pump and stabilizers for water well, oil field, construction ... for oil filed, waterwell. Including tricone bits, PDC bits and drill pipe. Various of model and dimension available. Good condition and reasonable ...