弱降斜钻具组合在大斜度井眼中的应用效果分析  

Application of Weak Drop off Bottom-Hole Assembly in High Angle Well

作　　者：史玉才[1] 艾中华[2] 管志川[1] 党军[3] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东东营257061 [2]中国石化国际石油勘探开发有限公司,北京100083 [3]长庆石油勘探局钻井工程总公司,陕西西安710021

出　　处：《石油钻探技术》2008年第1期13-15,共3页Petroleum Drilling Techniques

摘　　要：为了能够更好地在大斜度井眼中选择和使用钻具组合,提高大斜度井段钻井速度及井眼轨迹控制效率,应用纵横弯曲连续梁方法,分析了降斜钻具组合在大斜度井眼中的力学特性及井眼轨迹控制效果。理论研究及现场实践都表明,常用的弱降斜钻具组合在大斜度井眼中可能出现强降斜效果,在井眼轨迹控制过程中值得注意;缩短第一稳定器与钻头之间钻铤的长度或适当提高钻压等,能够减弱其降斜效果,提高轨迹控制效率。In order to optimize the bottom-hole assemblies in high angle well to enhance the rate of penetration and the wellbore trajectory control efficiency, mechanics characteristics of weak dropping bottom-hole assembly and its trajectory control efficiency in high angle hole were analyzed using the continuous beam theory. Theoretical study and field application indicate that the weak drop assembly might behave strong dropping trend in high angle deviated wells, which should be noticed. In addition, drop off rate can be reduced by shortening the drill collar length between the bit and the first stabilizer or by increasing weight on bit, and thus enhance well path control efficiency.

关 键 词：大角度斜井 井眼轨迹 井斜控制 钻具组合 效果 分析 

分 类 号：TE243[石油与天然气工程—油气井工程]