bit program

Taking the value simulation conclusion as the basis of construction plan and through computation,the geometric shape and the drill and blast plan of the partial excavation were determined.

温福铁路琯头岭隧道在DK280+950～DK281+100段下穿同三高速公路琯头岭隧道,在将数值模拟结论作为施工方案制定依据的基础上,通过计算确定分部开挖几何形状及钻爆方案,并将监控量测数据作为施工过程控制的第一手资料,确保铁路隧道下穿公路隧道顺利完成。

The optimization of branch numbers, branch angle and branch length and simulation drilling plan of fishbone-branch well are also researched in the paper.

面对大庆还没有开展鱼骨井钻井试验的现状,通过调研国内外鱼骨井钻井完井技术,结合大庆外围特低丰度薄差油层的地质特点,针对鱼骨井钻柱摩阻/扭矩预测、悬空侧钻、鱼骨井主井眼与分支井眼轨迹控制、鱼骨井主井眼完井管柱安全下入等四大技术难点,对分支井眼数量、分支井眼角度及分支井眼长度进行优化设计,开展鱼骨井模拟钻井工程设计及钻井方案研究,最终形成一套适应于大庆外围特低丰度油田薄差油层的鱼骨井钻井完井配套技术。