摘要
为了解决中深部地层钻头机械钻速低、单只钻头累计进尺少等问题,对PDC钻头进行优化设计。由试验数据回归出岩石抗压强度与可钻性级值间的计算式,并得到PDC钻头刀翼数、切削齿数与可钻性级值间的计算式。主要从冠部形状、切削齿、刀翼、保径和水力结构5个方面进行个性化设计,设计出六刀翼、双排齿、直线-圆弧-抛物线中锥型冠部形状、短螺旋保径、6个水眼+中心水眼和大排屑流道的M1666SS型PDC钻头。使用结果表明:钻速和单只钻头进尺比同区块同深度处最高纪录分别提高了35.4%和44%。
In order to solve such problems as low penetration rate and little single bit drilling foot- age, which often occur during drilling, when PDC bits drill the Medium-Deep to Deep Formations, PDC bits used in this area are optimized. By the test data, the formulas between compressive strength and drillability value can be regressed, and then the calculation model between blade number,cutter number and drillability value can be obtained. From five aspects including crown, cogging,blade,gauge and hydraulic composition,a new PDC called M1666SS PDC bit was devel- oped and put forward, which has six blades, double row teeth, straight line-arc-paracurve middle- parabolic crown shape,short spiral gauge,six nozzles plus central nozzle and big junk slot. Field experiment has found that the average penetration rate and single bit drilling footage have in- creased by 35.4% and 44% respectively compared with the offset well maximum record in the same depth.
出处
《石油矿场机械》
2013年第2期75-78,共4页
Oil Field Equipment
基金
"十二五"国家重大专项"碳酸盐岩
火成岩及酸性气藏高效安全钻井技术"(2011zx05021-002)资助
关键词
PDC钻头
结构
优化设计
数学模型
PDC bit
structure
optimizing design
mathematical model
