引用本文: 冯定, 鄢标, 王鹏, 卢汉斌, 张红, 魏世忠, 涂忆柳. 深水套管切割力学模型[J]. 力学与实践, 2015, 37(5): 622-625.
FENG Ding, YAN Biao, WANG Peng, LU Hanbin, ZHANG Hong, WEI Shizhong, TU Yiliuy. MECHANICAL MODEL OF CASING CUTTING IN DEEPWATER[J]. MECHANICS IN ENGINEERING, 2015, 37(5): 622-625.
 Citation: FENG Ding, YAN Biao, WANG Peng, LU Hanbin, ZHANG Hong, WEI Shizhong, TU Yiliuy. MECHANICAL MODEL OF CASING CUTTING IN DEEPWATER[J]. MECHANICS IN ENGINEERING, 2015, 37(5): 622-625.

## MECHANICAL MODEL OF CASING CUTTING IN DEEPWATER

• 摘要: 针对深水套管切割力学模型单一、切割泵冲选择困难等问题, 利用长杆铣削模型, 建立了深水套管切割力学模型, 计算出钻柱切割扭矩和切割允许的最大泵冲, 得出了切割扭矩占井口驱动扭矩的比例与作业水深之间的关系, 对深水弃井作业中套管割断判断指标的形成具有指导意义. 结合南海某两口井套管切割的现场数据, 验证了模型的正确性, 其计算结果可以为深水弃井作业中合理的泵冲参数选择提供理论参考, 为深水弃井作业提供技术保证, 进一步提高切割效率, 具有很好的应用价值.

Abstract: A mechanical model of casing cutting in deepwater is proposed based on the model of long pole milling. Through this model, the cutting torque of drill string and the maximum permitted pump stroke can be obtained. It is concluded that the relationship between the proportion of the cutting torque in the drive torque and the depth of water during operating provides some guidance for forming the judge index to determine whether the casing pipe is cut off completely in the deep water. Combined with the field data of two wells in the South China Sea, the model is verified. The results can be used for providing a theoretical reference for selecting the appropriate pump stroke and a technical guarantee for deepwater abandonment operations to improve the cutting speed and the time eficiency.

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