For the extended well, high angle drilling, horizontal drilling and deep well drilling, or in the well section of large dogleg severity, or the long open hole, casing wear often happens.
在大位移井、大斜度井、水平井和深井钻井中，或者在狗腿严重度较大的井段，或者在技术套管下入后的长裸眼钻井过程中，常常出现套管磨损问题。
Causes of casing wear and its effects on casing strength in drilling operations of deep well, ultra-deep well, extended reach well and horizontal well are analyzed in this paper.
分析了在深井、超深井、大位移井和水平井钻井施工中套管磨损的原因及对套管强度的影响。
Wear of casing and too large torque are problems which can't be ignored when drill deep and super deep well, horizontal well and deviated well.
套管磨损和扭矩过大是钻深井、超深井、水平井和大位移井时一个不容忽视的问题。
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