浅谈大井眼钻井技术

Discussion on the big hole drilling technology

大井眼(Φ311.1mm及以上尺寸)钻井由于受钻头尺寸大、破碎面积大、钻头类型单一、机械及水力能量不足等因素的影响,钻井速度慢,成本高,从地层可钻性研究及钻头选型、PDC钻头的使用、强化机械及水力参数、优化钻具组合、采用先进工具及工艺等方面提出了提高大井眼钻井速度的途径,在风城地区、呼图壁储气库的应用表明,能显著提高机械钻速,缩短钻井周期。

Limited by the drilling bit size,broken area of big hole size(311.1 mm and above) is large,and it has the problems of single bit type,mechanical and hydraulic energy shortage,slow drilling speed,high cost,.From the angle of formation drill ability and bit selection,the use of PDC bits,improved mechanical and hydraulic parameters,optimization of assembly,the use of advanced tools and process is put forward for improvement of the big hole drilling speed.In the windy city district,hutubi gas storage application shows that it can significantly improve the mechanical drilling rate,shorten the drilling cycle.