摘要
砾石层段气体钻井时,易在井壁形成台阶和凸起,使套管下入过程中容易遇阻。此时套管柱就成为一个具有超长细比特征的连续体遇阻问题,一旦遇阻载荷突然释放,将会在套管中形成动态冲击载荷。在干法固井(井筒内为气体)的条件下,钻机的额定悬重余量很小,这种附加动载将会造成很大的作业风险。文章在连续体及多自由度管柱振动分析的基础上,考虑干法固井特点,推导了套管柱振动的解析模型,分析了套管纵向振动的振型及动态载荷特征,研究了参数影响规律,得出了附加动载计算模型。这对于指导实际套管下入参数控制,保证固井作业安全具有十分重要的意义。
When drilling through the conglomerate formation with gas,stages or protruding points are often formed,affecting the casing running later on.Normally the method of reducing the suspension weight is used to improve the force on the obstacles by casing end and so to remove the obstacles.The running becomes a continuous running resisting problem with a super high length-diameter ratio casing string.Once the force of resistance is released,a dynamic impact load will be exerted on the casing string.When cementing in only-gas-filled dry holes,the rated suspension weight allowance is very small,this additional dynamic load will result in extremely high risk.In this paper,taking the boundary condition into consideration,based on the analysis of continuum vibration and multi-freedom vibration,the analytical solution of casing vibration is derived.Then the vertical vibration mode,the dynamic load and the influence parameters are studied,and the calculation model for additional dynamic load is established.This has an important significance for casing running parameter control,ensuring a safe cementing operation.
作者
李宁
狄勤丰
滕学清
王文昌
张权
张涛
杨沛
娄尔标
LI Ning;DI Qinfeng;TENG Xueqing;WANG Wenchang;ZHANG Quan;ZHANG Tao;YANG Pei;LOU Erbiao(PetroChina Tarim Oilfield Company,Korla,Xinjiang 841000,China;Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University,Shanghai 200072,China)
出处
《钻采工艺》
CAS
北大核心
2018年第5期5-8,131,共5页
Drilling & Production Technology
基金
国家自然科学基金联合基金重点支持项目"超深井钻柱非线性动力学及动态安全性基础理论研究"(编号:U1663205)
国家自然科学基金青年基金项目"气体钻井中预弯底部钻具组合控斜的非线性动力学机制"(编号:51704191)
上海市青年科技英才扬帆计划"复杂载荷环境下油井管螺纹接头三维力学特性高效计算方法研究"(编号:17YF1428000)
上海市重点学科建设项目(编号:S30106)资助
关键词
气体钻井
干法固井
下入遇阻
振动响应
附加动载
gas drilling
dry cementing
running resistance
vibration response
additional dynamic force
作者简介
李宁(1970-),高级工程师,1994年毕业于石油大学钻井工程专业,主要从事钻井工程技术的研究和管理工作。地址:(841000)新疆库尔勒石化大道26号塔指小区老办公楼B706,E-mail:Lining-tlm@petrochina.com.cn。
