The effect of tool joint must be considered in analysis of drillstring strength to reduce drillstring failure and keep safety in drilling process.
在计算钻柱强度时，应考虑接头对钻杆弯曲应力的影响，以实现安全钻井。
The effect of tool joint must be considered in analysis of drillstring strength to reduce drillstring failure and keep safety in drilling process.
在计算钻柱强度时，应考虑接头对钻杆弯曲应力的影响，以实现安全钻井。
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