Laser welding thin wall bit is characterized by high welding strength of bit teeth, no falling out of the teeth and mass production by non water dry drilling.

激光焊接薄壁钻头的显著特点是钻齿焊接强度高，不掉齿，可以用于无水干钻，便于实现大批量规模化生产。

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For bedrock drilling ordinary hard alloy driller can be adopted for vertical core-drilling with the addition of clear water during rotation. for overburden dry drilling process can be adopted.

基岩钻探方法以采取普通硬质合金清水回转垂直取心钻进，覆盖层采用干钻。

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Meanwhile, in Kenya, which has long lorded it over its poorer neighbour, exploration firms keep drilling dry holes, to Ugandans’ delight.

与此同时，使乌干达感到欣慰的是，肯尼亚，这个老是把乌干达看作穷邻居而抬举自己的国家，石油公司在那里一直只能钻出干井，还没能见到半点石油。

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Chesapeake Energy tacked on 6.3% after the natural-gas producer said it plans to further reduce dry-gas drilling activity by 50% and to curtail its gross gas production by about 8% in response to a drop in natural-gas prices.

WSJ: Dow Breaks Its Win Streak

By 1967 he was broke, having sunk all his cash into wildcat wells, drilling mostly dry holes.

FORBES: Magazine Article

Mr Kloppers said the writedown on the Fayetteville assets was also a reflection of BHP's decision to change course and shift drilling from dry gas to liquid-rich fields.

BBC: BHP Billiton in $3.3bn writedown as gas prices plunge