实体膨胀管的膨胀力有限元数值模拟及其应用  

Finite Element Numerical Simulation of Expansive Force on Solid Expandable Tube and Its Application

作　　者：于洋[1] 周伟[1] 刘晓民[1] 付建红[2] 郑江莉[3] 

机构地区：[1]中国石化西北油田分公司工程技术研究院,新疆乌鲁木齐830011 [2]西南石油大学石油工程学院,四川成都610500 [3]中国石化西北油田分公司工程监督中心,新疆轮台841600

出　　处：《石油钻探技术》2013年第5期107-110,共4页Petroleum Drilling Techniques

基　　金：国家科技重大专项"大型油气田及煤层气开发"课题"碳酸盐岩缝洞型油藏钻井技术完善与推广"(编号:2011ZX05049-02-02)资助

摘　　要：针对塔河油田深井侧钻井巴楚组和桑塔木组地层泥岩垮塌难题，优选φ139．7mm实体膨胀管对复杂泥岩段进行机械封隔。根据弹塑性有限元理论，利用有限元数值模拟研究了φ139．7mm实体膨胀管的膨胀特性，探讨了膨胀率、屈服强度、摩擦系数和膨胀锥锥角对膨胀力的影响规律。在塔河油田TK6—463CH并进行了实体膨胀管的现场施工应用，将该井膨胀锥锥角设计为10°，预测膨胀力为603-607kN，与实际计算结果相比误差小于8％，表明该方法具有合理可行性，为深井侧钻井膨胀管设计及膨胀管施工提供了技术支持。View of the mudstone collapse encountered in Bachu and Sangtamu formations in deep sidetracking wells of Tahe Oilfield, the solid expandable tube with 5.5 inch OD was selected to seal the mudstone mechanically. According to the theory of elastoplasticity, finite element numerical simulation was adopted to study the expansion characteristics of the solid expandable tube, the expansion ratio, yield strength,friction coefficient and the impact on the expansion force by expansion cone angle were analyzed. The expandable tube was used in Well TK6-463CH of Tahe Oilfield,which was designed with an expansion cone angle of 10°, expected expansion force of 603-607 kN,with a simulation error of less than 8%. The resuits show that the method is feasible, providing reference for expandable tube design and operation in deep well sidetracking.

关 键 词：实体膨胀管 膨胀力 有限元 数学模型 膨胀锥锥角 

分 类 号：TE921.9[石油与天然气工程—石油机械设备]