小井眼钻井88.9 mm钻杆特殊扣连接性能研究  

STUDY OF SPECIAL CONNECTION PERFORMANCE ON 88.9 MM DRILL STRING IN SLIM HOLE DRILLING

作　　者：况雨春 王宏君 刘建勋[1] 林海 

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]南充合能压缩天然气有限责任公司,南充637000

出　　处：《机械强度》2017年第6期1474-1479,共6页Journal of Mechanical Strength

基　　金：国家油气重大专项(2016ZX05038005-001)资助~~

摘　　要：在小井眼开窗侧钻中,88.9 mm直径直连型钻杆,可以有效降低沿程压耗,提高携岩能力,也可以有效传递扭矩,进行旋转钻进以提高钻进效率。为满足实际需要,为提高小井眼钻井用88.9 mm钻杆接头的承载能力,提出一种矮牙双台肩特殊扣螺纹,通过三维有限元分析,对螺纹的连接性能进行了研究,包括不同载荷下的螺纹三维应力特征以及不同轴向拉伸载荷条件下的极限工作扭矩,并绘制出钻具接头的极限工作扭矩曲线,形成不同拉力下钻具接头极限工作扭矩快速确定的方法。研究对于指导钻具接头的选用与优化设计、分析钻具接头的承载极限、确定极限钻进深度具有十分重要的意义。In slim hole sidetracking drilling,88. 9 mm diameter direct type drill pipe can effectively reduce the pressure loss along the path and increase the rock carrying,also can transfer torque effectively,rotary drilling to improve drilling efficiency. In order to meet the actual needs,improving the carrying capacity of 88. 9 mm drill pipe joint in slim hole drilling,this paper presents a low tooth-double shoulder-special thread. By 3 D Finite Element analysis,the performance of thread connection were studied,including the stress in three-dimension under different loads and the limit torque under different axial tensile loads. And draw out the limit torque curve of the tool joint. Forming a quickly method to determine the tool joint limit torque under different tension. The research is of great significance for guiding the selection and optimization of the drill pipe joint,analyzing the limit load of the drill pipe joints and determining the the limit drill depth.

关 键 词：小井眼开窗侧钻 钻杆特殊扣 三维有限元分析 应力特征 极限工作扭矩曲线 

分 类 号：TH131.3[机械工程—机械制造及自动化]