由于钻井深度不断增加和钻机水功率这两个因素,需用4(1/2)英寸或5英寸钻杆钻达完井深度。对于钻杆为什么会在被卡瓦咬合的部位被咬坏(尤其在承受较大的载荷时),正引起人们的注意。 经分析表明,钻柱被卡瓦咬坏是由多种因素所引起的。再则,不论在何种情况下,使用合适的工具和操作技术能使这类损坏减到最小。 有关钻杆损坏的结论和理论计算的结果证实: Depth of completion needs to be drilled with 4 (1/2) in or 5 in. Drill rods due to both increasing drilling depth and rig water power. Why drill pipe is bitten in the area of ​​the snap bite (especially when subjected to a larger load), is attracting people’s attention. The analysis shows that the drill string by snap slipping is caused by a variety of factors. Again, in any case, the use of suitable tools and operating techniques can minimize such damage. The conclusions of the drill pipe damage and theoretical calculations confirm: