摘要
对连续油管进行了摩阻和受力分析。为尽可能减少测量误差，对水平井数据进行了最小二乘平滑处理；为便于数值计算，又进行了三次样条函数插值，把水平井各离散点数据转化为在整个井深具有Ｃ～２连续的分段连续曲线；建立了空间曲线井眼轨迹管柱摩阻模型，对模型进行处理后得出分段微分方程，采用四阶 Ｌｕｎｇｅ— Ｋｕｔｔａ法求解该方程，进而得出管柱各截面的力、力矩和内力。
This paper analyzes the friction and other forces exerted on the coiled tubing. To reduce largely measuring errors, the data from the horizontal well have been processed by means of the method of least squares; for the convenient of numerical calculation, the cubic spline function has been introduced, and thus the separated point data of the well became a C^2 continuous curve. The frictional resistance model of 3 - D curve locus has been established. After a series of deduction, a differential equation that can be solved by four orders Longe-Kutta method has been acquired. Thus, the sections' forces, moments and stresses of coiled tubing are obtained.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
1999年第3期61-64,共4页
Oil Drilling & Production Technology
关键词
水平井
油管
连续油管
摩擦
受力
数学模型
horizontal well
coiled tubing
friction loss
force analysis
mathematical model
