另一种可能更有前途，就是制造页岩油钻井设备的。如BHI， CRR等，CRR制造把页岩搞裂后不让裂缝闭合的陶瓷珠，去年到现在涨4倍。因为页岩油钻井量大大增加。
Figure 1. US Active rigs engaged in oil drilling, according to Baker Hughes.
Active rigs in North Dakota have also increased greatly. (These rigs are include both oil and natural gas, but with the Bakken and Eagle Ford plays in North Dakota, it seems as though most would be oil rigs.)
Figure 2. Active drilling rigs in North Dakota, according to Baker Hughes.
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