扭转式机械振荡器的研制与应用效果评价  

Development and Application Evaluation of Torsional Mechanical Oscillator

作　　者：王方祥 杨鑫 任健偲 蔡晓伟 张建山 张乾 WANG Fangxiang;YANG Xin;REN Jiancai;CAI Xiaowei;ZHANG Jianshan;ZHANG Qian(Downhole Technology Service Company,CNPC Bohai Drilling Engineering Co.,LTD.Tianjin 300283,China;NO.2 Drilling Engineering Company,CNPC Bohai Drilling Engineering Co.,LTD.,Langfang,Hebei 065007,China;Oil Testing Engineering Operation Department of Downhole Operation Branch,CNPC Bohai Drilling Engineering Co.,LTD.,Renqiu,Hebei 061450,China;Second Mud Logging Branch,CNPC Bohai Drilling Engineering Co.,LTD.,Renqiu,Hebei 062550,China)

机构地区：[1]中国石油渤海钻探工程公司井下技术服务公司 [2]中国石油渤海钻探工程有限公司第二钻井工程分公司 [3]中国石油渤海钻探井下作业分公司试油工程作业部 [4]中国石油渤海钻探工程公司第二录井分公司

出　　处：《钻采工艺》2021年第5期83-87,共5页Drilling & Production Technology

基　　金：国家科技重大专项“页岩气水平井压后裂缝参数评价”(编号:2016ZX05060001-032);中国石油科技开发项目“长宁页岩气深层工厂化压裂提效技术推广”(编号:2020T-002-007);中国石油开发项目“连续管作业技术专项推广(二期)”(编号:2017B-4107)。

摘　　要：为了解决连续油管在长水平井段因螺旋变形而自锁无法下至预定深度的问题,利用弹簧蓄能和齿形交错结构,研制了一种扭转式机械振荡器并分析了其结构及工作原理。基于冲击动力学理论建立了工具冲击载荷的计算模型,结合管柱的螺旋屈曲摩阻模型,计算了不同管柱结构下连续油管在水平段的极限推进深度,最后开展了页岩气井的现场试验。计算结果表明,安装扭转式机械振荡器后,同工况下推进深度相对光管柱提高了94.7%,相对安装水力振荡器的管柱提高了78.1%,极限推进深度可达2700 m以上。现场应用验证了连续油管极限推进深度理论计算的准确可靠性,并且表明该工具设计合理,可极大降低管柱间的摩擦力,有效解决连续油管在长水平井段的自锁问题,增加其在水平井段的推进深度。The coiled tubing is often self-locked due to spiral deformation when it is used in the long horizontal interval,then it cannot reach the predetermined position.Based on the spring energy storage and tooth staggered structure,a kind of torsional mechanical oscillator was designed,and its structure and working principle was analyzed.The calculation model of impact load was established by using the theory of impact dynamics,and the extreme advancing depth of different structure in the same working condition were calculated respectively combined with the helical buckling friction model.Finally,the field application in shale gas wells was carried out.The calculation results show that the extreme advancing depth of the mechanical oscillator can reach more than 2700 m,which is increased by 94.7%compared with the smooth pipe and increased by 78.1%compared with the hydraulic oscillator.The field application verifies the accuracy and reliability of the theoretical calculation of the extreme advancing depth,and shows that the tool can greatly reduce the friction between the tubing strings,effectively solves the problem of self-locking of coiled tubing in long horizontal well sections,and increases its depth of advancement in horizontal well sections.

关 键 词：连续油管 机械振荡器 冲击载荷 管柱摩阻 极限推进深度 降阻效果 现场应用 

分 类 号：TE93[石油与天然气工程—石油机械设备]