底部钻具组合和屈曲建模.ppt

Torque Drag Buckling Soft vs Stiff Soft-string model does not estimate properly contact side forces on the drill string (Casing Wear !) Up to 50 % of difference at some locations Buckling Modeling 屈曲建模 λ =2 2 = 2.83............ChenCheatham λ =2(2 2 ?1) =3.65...DawsonPaslay λ =4 2 =5.65............Mitchell EIωsin(Inc) r Fc = 2 Sinusoidal正弦的 Helical螺旋形的 EIωsin(Inc ) r Fc= λ Buckling Standard Buckling Criteria ? Rotation, Friction and Dog Legs have a great effect on Buckling Buckling Standard Buckling Criteria Idealized Case 理想化标准屈曲的情况 Advanced Buckling Modeling Field Conditions 先进屈曲模型场条件 旋转、摩擦和狗腿对屈曲产生巨大的影响 Buckling屈曲 Laboratory Validation实验证明 0 2 4 6 8 10 12 14 16 0 -0.005 -0.01 -0.015 0.015 0.01 0.005 0 -0.005 -0.01 -0.015 Z Y X Buckling Laboratory Validation ABIS Model / NO ROTATION ABIS模型/不旋转 ABIS Model / ROTATION ABIS模型/旋转 Lab Test / NO ROTATION 实验室测试/不旋转 0.015 0.01 0.005 SPE 102850 Buckling Backward Whirling at Low RP 在低转速下的向后旋转 PerfectWellBoreGeometry 理想井眼 ActualWellboreGeometry 实际井眼 NoFriction/NoRotation 没有摩擦/没有旋转 LiteratureEquations:Correct 方程:正确 NumericalModelRequired 需要数值模型 Friction/NoRotation LiteratureEquations:Correct NumericalModelRequired NoFriction/Rotation LiteratureEquations?? NumericalModelRequired Friction/Rotation NumericalModelRequired NumericalModelRequired TaperedStrings/ToolJoint锥形杆/工具接头 LiteratureEquations?? NumericalModelRequired Buckling Standard Equations Verification EIωsin(Inc ) r Fc= λ Standard Equation标准方程 Numerical Approach数值方法 Gyroscope Measurement inside buckled DP 有扣的dp钻头内部的陀螺仪的测量 Buckling Modeling Results 屈曲建模结果 Buckling Shape屈曲形状 Bending Stress弯曲应力 Contact Forces接触力 Buckling Full-scale Buckling Validation Full-scale Buckling Test 全面的屈曲试验 Ulrigg Test (Norway) Various WOB on DP DP 钻头上的各种钻压 500 m 1000 m CoPilot (test2) CoPilot (test1) 1500 m WOB钻压 Deformed drill string measured by the gyroscop用陀螺仪测量