KQC series of air hammers used in gas drilling can solve certain problems, such as lower ROP(Rate of Penetration) and well deviation, which occurred in mud drilling in above medium hard formation.
在油田气体钻井中使用KQC系列空气锤，解决了泥浆钻井在中硬以上地层中钻速慢、易井斜的难题。
Suitable for medium hard formation.
适应于中等硬度地层。
Suitable for soft to medium hard Non-abrasive formation.
适应于软到中硬非研磨性地层。
Suitable for medium to medium hard formations such as sandstone, limestone and dolomite.
适用于中至中硬地层中使用，如砂岩、石灰岩及白云岩。
Suitable for medium hard formations. It allows to be used in a wide variety of formations.
适用于中硬地层，是适应性较广的取芯钻头之一。
So the rock cuttabilities are divided into three levels as soft, medium soft and medium hard, based on which the rock cuttabilities along the tunnel is recognized.
因此，将岩石可切割性划分为软、中软及中硬三个级别，对掘进过程中岩石的可切割性进行识别。
Medium-magnesium cast steel is brittle and suitable for crushing low or medium hard ores Its abrasion-resistance is 2.45 as high as that of the high-magnesium steel under non-heavy impact conditions.
中锰耐磨铸钢属脆性材料，在非强烈冲击条件下使用，是高锰钢耐磨性的2.45倍，适用于破碎中低硬度的矿石。
PDC bits have been used to drill the homogeneous formation from soft to medium-hard, but they are not suitable for drilling in gravel and multi-interbedded formation.
PD C钻头用于软到中硬的均质地层钻进具有钻速高、寿命长等特点，但不适合含砾石地层和软硬交错地层。
For small rotary rock drill bits and rotary prospecting bits to cut soft, medium-hard rock.
用于中小规格冲击钻及旋转勘探钻具，凿进软岩层、中硬岩层。
For small rotary rock drill bits and rotary prospecting bits to cut soft, medium-hard rock.
用于中小规格冲击钻及旋转勘探钻具，凿进软岩层、中硬岩层。
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