| |
| 地层 | 极软地层
含粘性夹层和低抗压强度 | 软地层
低抗压强度
高可粘性 | 软至中硬
低抗压强度的均质夹层地层 | 软至中硬
低抗压强度的
非均质夹层地层 | 中至硬地层
中等抗压强度，含少量研磨性夹层的地层 | 硬及致密地层，高抗压强度无研磨性 | 硬及致密地层，高抗压强度研磨性 | 极硬和研磨性地层 | | 岩性 | 强粘土
粘土
泥灰岩 | 泥灰岩
盐岩
石膏岩
页岩
砂岩 | 页岩
砂岩
白垩岩 | 页岩
砂岩
灰岩 | 页岩
砂岩
灰岩 | 粉砂
砂岩
灰岩
白云岩 | 砂岩
页岩 | 火成岩 | | PDC钻头 | G574, AG574, G554, AG554, BD554, STR554, R574, G604 | AG574, AG526, BD535, G605P,G526, BD605, STR605, G505, GS605F, G544P, STR535 | AG527, BD536P, BD506XL, G545, G536, STR434, G405, GS605T, G535, G605, G544H, STR426, G605KG, STR325, G435 | G535, G536XL, G545H, BD536, BD445, G445XL, G406, G407, BD406, GS606, STR434, STR445, STR335, G536X, BD606, BD506XL, BD606KG, BD445ZT, G506 | G447XL, G535, BD447, STR447, STR386, BD449, BD606KG, G408, BD407, BD408 | G447XL, G449XL, BD447, BD449, STR447, STR386, BD409, STR382 | STR386, BD308 | STR386, BD308 | | 巴拉斯钻头 | ---- | ---- | ---- | S225, S725 | S226, S248, S725 | S725, S278, S280, S279, S281 | S278, S280, S790, S281 | S279, S280, S281 | | 天然金刚石钻头 | ---- | ---- | ---- | D331, D41 | D41, D24 | D24 | ---- | ---- | | 牙轮钻头分级 | 111-126
417 | 116-126
417-447 | 126-127
417-447 | 417-447 | 437-517 | 517-547 | 547-637 | 647-837 |
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