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It is considered that fatigue crack is early produced on drill pipes, because the vibration load of drilling tools in air drilling is more severe than that in mud drilling. Fatigue cracks easily occur under alternating vibration. Because the current wellhead detecting instruments can not be used to reflect the change of pump pressure produced after drill pipe piercement timely and accurately, effective measures can not be taken in time to prevent the expansion of fatigue cracks. As a result, drill pipe fracture accidents occur.

失效分析表明,钻杆属于早期疲劳断裂,断裂主要原因是在空气钻井过程中钻具受到的震动载荷远大于钻井液钻井过程中的震动载荷,在交变的震动载荷作用下,钻具容易产生疲劳裂纹;由于现有的井口检测仪表不能精确及时反映钻杆刺穿之后产生的泵压变化,无法及时采取预防措施,疲劳裂纹不断扩展,最终导致了钻杆断裂失效。

It is considered that fatigue crack is early produced on drill pipes, because the vibration load of drilling tools in air drilling is more severe than in mud drilling. Fatigue cracks easily occur under alternating vibration. Because the current wellhead detecting instruments can not be used to reflect the change of pump pressure produced after drill pipe piercement timely and accurately, effective measures can not be taken in time to prevent the expansion of fatigue cracks. As a result, drill pipe fracture accidents occur.

失效分析表明,钻杆属于早期疲劳断裂,断裂主要原因是在空气钻井过程中钻具受到的震动载荷远大于钻井液钻井过程中的震动载荷,在交变的震动载荷作用下,钻具容易产生疲劳裂纹;由于现有的井口检测仪表不能精确及时反映钻杆刺穿之后产生的泵压变化,无法及时采取预防措施,疲劳裂纹不断扩展,最终导致了钻杆断裂失效。

推荐网络例句

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了,请告诉我,我会帮助你摆脱困境,真的,请联系我啦!

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放,就是一个这样的例子。

Well, Jerry would rattle off all the details of that movie.

那么,杰瑞会急促背诵那部电影所有细节。