偏置工具后置式旋转导向系统导向性能分析  

Steering ability of rotary steering drilling system with rear-mounted bias tool.

作　　者：孙铭新[1] 于波[1] 李静[2] 

机构地区：[1]胜利石油管理局钻井工艺研究院 [2]中石化石油勘探开发研究院

出　　处：《石油机械》2002年第10期4-5,15,共3页China Petroleum Machinery

摘　　要：对新提出的偏置工具后置式旋转导向系统的导向机理、导向性能及其影响因素等做了理论分析 ,由此得出 5点结论 :(1)偏置工具后置导向的造斜能力随钻压的增加而减小 ,通过控制钻压可在一定程度上控制工具的造斜率 ;(2 )偏置工具后置导向的底部钻具组合中 ,应使偏置工具与近钻头稳定器间的距离保持在 6m以上 ,按常规钻具选配 ,其间可接 1根 (约 9m)钻铤 ;(3)不论增斜还是降斜 ,偏置工具后置的导向能力远优于前置方式 ;(4)近钻头处的钻压、弯矩、冲击、振动等是整个底部钻具组合中最强的 ,将偏置工具安放于工作环境相对较好的后置位置 ,可改善偏置工具的工作条件 ,减少其非正常损坏的几率 ;(5 )偏置工具后置在非导向状态下 ,其柔性钻铤以下的底部钻具组合相当于一套稳斜或微增斜钻具组合 ,符合导向钻具组合的施工需要。A rotary steering drilling (RSD) mode with bias tool rear-mounted is put forward. The steering mechanism and steering ability of the RSD system are analyzed. Conclusions are drawn as follows: (1) the angle-buildup ability of the RSD system decreases with the increase of the bit load, therefore the angle-building ability can be control to a certain degree by controlling the bit weight; (2) in the BHA of the system, the space between the bias tool and the stabilizer near the bit should be kept above 6 m; (3) the steering ability of the rear-mounted bias tool is higher than that of the front-mounted tool whether in increasing or decreasing the well deviation; (4) the working conditions of the bias tool can be improved when rear mounted; (5) under non-steering condition, the steering mode can meet the requirements of on-site operation of BHA.

关 键 词：偏置工具 后置式 石油钻井 旋转导向系统 导向性能 

分 类 号：TE921.2[石油与天然气工程—石油机械设备]