The aerated foam mud fluids can used in negative drilling, and enlarge the life of drilling bits for its low density, and low sap pressure.
充气泡沫泥浆由于比重低，液柱压力低，实现了负压钻进，能大幅度提高机械钻进，延长钻头寿命。
2
It is shown from the study that aerated-concrete product made from red-mud has eligible quality and can satisfy our need. It is a new way of a kind of comprehensive utilization of red-mud.