小井眼卡钻现象分析  

The Analysis of Undergauge Hole Sticking

作　　者：田相元[1] 王相磊[2] 曹庆和[1] 沈献良[3] 张古森[4] 

机构地区：[1]中原油田分公司工程监督中心 [2]中原石油勘探局钻井二公司 [3]中原石油勘探局钻井一公司 [4]中原石油勘探局钻井三公司

出　　处：《断块油气田》2002年第6期79-82,共4页Fault-Block Oil & Gas Field

摘　　要：应用弹性力学和材料力学有关理论 ,对钻井过程中的小井眼卡钻现象进行了分析 ,建立了小井眼卡钻的力学模型 ,并对影响小井眼卡钻的各种因素 (下放速度、遇阻吨位、井壁摩擦系数、地层因素、钻具几何尺寸及缩径严重程度等 )进行了定量分析 ,在此基础上 。This paper analyzes a kind of sticking-undergaugehole sticking, and establishes the mechanical model.According to the model, the main factors that affect thiskind of sticking are the velocity of running the drilling string, the tonnage of touching down the expanding formation section, wall friction coefficient, formation properties, the geometric size of drilling string, the serious degree of formation expanding and so on. In the meanwhile, it calculated the required pulling force that make the stuck pipe free. On the basis of this calculations,it carried out abstractive measures that preclude and deal with this kind of sticking.

关 键 词：小井眼卡钻 力学模型 下放速度 遇阻吨位 钻井液 石油钻井 

分 类 号：TE28[石油与天然气工程—油气井工程]