“压不弯钻铤”究竟错在哪里?  

"Unbending Drill Collar" What Went Wrong?

作　　者：韩志勇[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东东营257061

出　　处：《石油钻探技术》2010年第6期1-4,共4页Petroleum Drilling Techniques

摘　　要：从理论上对文献[1-3]提出的关于"压不弯钻铤"的三种模型进行了详细分析,认为"柔索空心管模型"的原理是正确的,但"液压内管模型"和"带中心管的液压内管模型"在理论上都是不能成立的。同时对文献[3]中的"液压内管模型"室内试验数据进行了分析,认为该试验的最大轴向载荷没有超过承压外管的临界屈曲载荷,所以其室内试验结论是虚假的,不真实的。由于"液压内管模型"在理论上就是不正确的,因而文献[3]中5口井的现场应用结果无法证明"压不弯钻铤"的正确性。The three models given by reference were discussed in detail.The ＂soft-string and tube model＂ is right principally.While ＂the model of inside tube borne hydraulic pressure＂ and ＂the model of inside tube with a central tube borne hydraulic pressure＂ were wrong theoretically.The experimental data of ＂the model of inside tube borne hydraulic pressure＂ from reference[3] were analyzed.It shows that the maximum axial load is less than critical buckling load,therefore the conclusion from its laboratory tests is wrong.Because ＂the model of inside tube borne hydraulic pressure＂ is wrong theoretically,the 5 well field application mentioned in reference[3] can not prove the ＂unbending drill collar＂.

关 键 词：压不弯钻铤 真实轴向力 有效轴向力 虚力 管柱力学 

分 类 号：TE21[石油与天然气工程—油气井工程]