白云岩在较高围压下表现屈服塑性，在低围压下表现脆性破坏。
Limstone reflects yielding plastic character in high confining pressure, in low confining pressure reflects brittleness character.
倒装钟摆钻具组合是一种新型的直井防斜钻具组合，在小井斜角高钻压下表现出了较好的防斜特性。
Pendulum assembly is a kind of BHA for hole straightening, which is applied widely in drilling practice.
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