IADC | 113,114,115,117,127,137,214,215,216,227 237,314 315,316,317,325,326,327,415,425,435,445,417,427 437,517,527,537,515,525,617,627,637,615,625,732,832 |
牙轮钻头尺寸 | 3 1/2,3 7/8,4 1/2,5 1/2,6,6 1/2,7 1/2,8 1/2,8 3/4,9 1/2, 9 5/8,10 5/8,11/4,13 3/4,14 3/4,15 1/2, 16, 171/2, 20, 22,23,24,26 |
