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空间碎片协委会代码 | WOB (千牛/毫米) | RPM (r/min) | 适用的地层 | |||
437/447/435 | 0.35~0.9 | 240~70 | 抗压强度低、可钻性高的非常软的地层,如粘土、泥岩、白垩、石膏、盐、软石灰石、 等。 | |||
517/527/515 | 0.35~1.0 | 220~60 | 抗压强度低、可钻性高的软地层,如泥岩、石膏、盐、软石灰石等。 | |||
537/547/535 | 0.45~1.0 | 220~50 | 具有低抗压强度的软到中等地层,如中等、软页岩、中等软石灰岩、中等软砂岩、 具有较硬和磨蚀性夹层等的介质形成。 | |||
617/615 | 0.45~1.1 | 200~50 | 具有高压缩强度的中等硬质地层,如硬页岩、石灰岩、砂岩、白云岩。等等 | |||
637/635 | 0.5~1.1 | 180~40 | 抗压强度高的硬质地层,如砂岩、石灰石、白云石、硬石膏、大理石等。 | |||
注意: 上表中的WOB和RPM的上限不应同时使用 |
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