Friction reduction measurement for a coiled tubing working in a marine riser
Friction reduction measurement for a coiled tubing working in a marine riser
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在海洋立管中工作的连续油管的减摩测量
DOI：
10.1016/j.measurement.2015.01.008
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发表时间：
2015-04-01
期刊：
影响因子：
5.6
通讯作者：
Xiong, Minghao
中科院分区：
文献类型：
--
作者：
Chen, Yingchun;Zhang, Shimin;Xiong, Minghao
由于摩擦损失，施加在连续油管（CT）上的注射力将无法完全传递到其末端。在这种情况下，CT可能会卡在立管中，最终导致操作失败。本文对如何减小连续油管与隔水管之间的摩擦力进行了试验和计算研究，以保证连续油管与隔水管之间的安全可靠运行。结果表明，随着环空间隙的增大，内管轴向力传递效率降低，而喷射速度对内管轴向力传递特性几乎没有影响。因此，为了使内管将更多的轴向力传递到其底端，在操作过程中应使用较大直径的CT。上述研究为CT在海洋中的应用提供了重要的理论支持。(C)2015爱思唯尔有限公司版权所有。
Due to friction loss, the injection force applied on the Coiled Tubing (CT) would be unable to completely transfer onto its end. In that case, CT might be stuck in the riser which would finally make the operation failed. This paper proceeded experimental and computational study on ways to reduce friction between CT and riser to ensure the safety and reliability of the operation. Results show that inner pipe's axial force transfer efficiency will decrease with the increasing of annular clearance, but injection velocity has almost no effect on inner pipe's axial force transfer behavior. Thus in order to make the inner pipe transfer more axial force to its bottom end, CT with bigger diameter should be used during the operation. The research done above might provide important theoretical supports for the marine application of CT. (C) 2015 Elsevier Ltd. All rights reserved.