Using cement slurry to support theholewalls and plug the leaky zones is one of the effective ways in drilling construction to deal with the troublesome zones.
水泥浆护壁堵漏是钻探施工对付复杂地层的有效方法之一。
2
The mechanic affection on the blast holewalls is simply analysed and cracking propagation caused by shaped charge is explained in this paper.
简单分析了聚能爆破装药在孔内爆破的力学效应,阐明了聚能爆破对岩石定向破裂的控制机理。
3
They fired Ecstasy Theater gas, and explosion inthe building the walls of a hole.