本文介绍的采用套管钻进和潜孔锤钻进相结合的复合性钻进工艺，有效地解决了在卵砾石层中钻进的难题。
Difficulties are encountered in drilling in boulder formation are efficiently eliminated by using of a combined drilling technique which combines casing drilling with DTH drilling method.
采用组合钻具进行跟管钻进，通过随钻跟入的套管保护孔壁，解决因钻孔垮塌导致钻探效率和岩心采取率低等技术难题。
The problems of low drilling efficiency and low core recovery due to borehole collapse were solved with pulling in casing while drilling through using combined BHA with casing.
本方法与书本上所述的套管护壁跟管钻进方法有反向思维操作概念。
This is a reversal thinking operation concept against the pipe drilling method of casing pipe wall protection described in conventional books.
描述比标准方法钻进的井眼尺寸大大缩小的井眼(与套管程序有关)的一种不很精确的术语，通常井眼直径小于6英寸。
An inexact term describing a borehole (and associated casing program) significantly smaller than a standard approach, commonly a wellbore less than 6 in. in diameter.
振动击打：用于松散的砂、卵石、碎石地层的钻进及下套管等。
C. Vibration strike: it is used in drilling and casing with loosen sand, cobble stone and gravel layer etc.
超深探井在钻进过程中出现套管挤毁、井漏而常规封堵无效等复杂问题，影响了下一步正常钻进，短回接尾管固井技术能很好地解决该技术难题。
The short liner cementing technique can successfully solve some difficult technical problems, such as casing collapse, loss circulation during ultra deep exploratory well drilling operations.
提高绳索取心钻进效率要做到：一是根据孔深、钻孔孔径、钻孔所遇地层及其岩性的完整程度、构造特点、风化带发育深度等选择套管的直径及下入深度；
To raise wire-line drilling efficiency need to: 1. Select casing diameter and depth according to drilling depth, diameter, strata drilled and rock integrity, structure features, weathered layer depth;
当安放在离钻头较近的位置时，无需常规的第二趟钻进行口袋扩眼，井眼条件可得到极大的改善，套管可以更快下到位。
When placed near the bit, the traditional second rathole reaming run is eliminated, wellbore conditions are improved, and casing can be run that much faster.
当安放在离钻头较近的位置时，无需常规的第二趟钻进行口袋扩眼，井眼条件可得到极大的改善，套管可以更快下到位。
When placed near the bit, the traditional second rathole reaming run is eliminated, wellbore conditions are improved, and casing can be run that much faster.
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