... interbedded sand 砂岩夹层 interbedded formation 交互层 interbedded strata 互层 ; 互生岩层 ; 互层土 ...
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This paper presents the PDC bits with the satisfactory testing result in the multi-interbedded formation.
介绍了一种复合式PD C钻头，该钻头在多夹层地层钻井施工中取得了较好的试验效果。
According to the optimization design, a new type of PDC bit was produced and got better result when it was used in the multi-interbedded formation.
根据该设计制造的一种新型复合式PDC钻头在多夹层地层中取得了较好的应用效果。
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。
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