hard formation

Tangible Results Achieved in Hard Formation Drilling with Percussion Type Wire Rope Coring Tools

绳索取心冲击回转钻具钻进硬岩效果显著

A new type bottom hole assembly is provided for high angle deviated and hard formation.

为大倾角硬地层易斜区防斜打快提供了一种新型的钻具组合类型.

Study on Impregnated Diamond Bit's Optimal Design for Hard Formation

适合坚硬地层孕镶金刚石钻头优化设计研究

A new synthetic diamond impregnated matrix for drill bit used in hard formation is designed.

针对软硬交错、研磨性高的地层设计了一种新型人造金刚石混合孕镶块。

Because of the low penetration rate and loss of fault in block 32 and 53 in YEMEN, the problem of loss was successfully salved by adopting the foam drilling fluid and accelerated the drilling speed in hard formation by applying the air hammer.

也门32区块和53区块地层可钻性差、存在断层漏失，采用泡沫钻井液有效地解决了井漏问题，应用空气锤钻井加快了硬地层的钻进速度；

Application of sidetracking methods in directional well of hard formation

硬地层定向井中几种侧钻方法的灵活应用