中空转子螺杆钻具外特性存在问题的讨论  

Problems with performance characteristic of screwrill with hollow rotor

作　　者：苏义脑[1] 王家进[1] 

机构地区：[1]石油勘探开发科学研究院,北京石油勘探开发科学研究院

出　　处：《石油机械》1996年第5期14-17,共4页China Petroleum Machinery

摘　　要：讨论了中空转子螺杆钻具转速软特性和中空分流功率损失的外特性问题，指出速度刚度与过载失速是评价中空转子螺杆钻具转速软特性的两个重要参数，同时分析了造成中空转子螺杆钻具转速特性变软的原因。通过计算某型中空转子螺杆钻具的额定失速、过载失速和额定功率损失，从量上分析了中空转子螺杆钻具转速特性软的程度及螺杆钻具高启动压降所带来的不利影响，进而说明中空转子螺杆钻具的转速特性有待于改进。The soft characteristic of the rotary speed and the power loss resulting from flow divergence of the scredrill with hollow rotor are analyzed.It is pointed out that rotary speed stiffness and overload stall are two important parameters for evaluating the soft characteristic Of the speed of the screwdrill,and the cause of the softening of speed characteristic are discussed.By calculating the rated stall,overload stall and power loss of a certain screwdrill,the disadvantages resulting from the softness of the rotary speed characteristic and the high starting pressure dtoP are quantitatively analyzed.

关 键 词：螺杆钻具 转速 功率 效率 钻井 

分 类 号：TE921[石油与天然气工程—石油机械设备]