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公开(公告)号：EP2771541B8
公开(公告)日：2017-09-20
申请号：EP12844402.3
申请日：2012-10-29
发明人： PONS, Victoria, M.
CPC分类号： F04B49/065 , E21B43/127 , E21B47/0008 , E21B2043/125 , F04B47/022 , F04B49/20 , F04B51/00 , F04B2201/121 , F04B2201/1211 , G05B13/042
摘要： Diagnosing a pump apparatus having a downhole pump disposed in a deviated wellbore characterizes axial and transverse displacement of a rod string with two coupled non-linear differential equations of fourth order, which include axial and transverse equations of motion. To solve the equations, derivatives are replaced with finite difference analogs. Initial axial displacement of the rod string is calculated by assuming there is no transverse displacement and solving the axial equation. Initial axial force is calculated using the initial axial displacement and assuming there is no transverse displacement. Initial transverse displacement is calculated using the initial axial force and the initial axial displacement. Axial force and friction force are calculated using the initial displacements, and the axial displacement at the downhole pump is calculated by solving the axial equation with the axial force and the friction force. Load at the downhole pump is calculated so a downhole card can be generated.
摘要翻译： 泵装置具有布置在井眼中的井下泵，并且在井筒的表面处具有马达，井下泵通过由马达操作地移动的杆柱在井筒中往复运动。 指示井下泵的负载和位置的卡片是使用表面测量和具有阻尼因子或两个阻尼因子的波动方程模型产生的。 实际流体载荷线由井下卡确定井下泵的上行和下行行程，并根据井下数据的载荷分布计算流体载荷线。 将实际的流体载荷线与计算出的流体载荷线进行比较，使得泵装置的至少一个参数可以基于该比较进行修改。 例如，可以调整波动方程模型的阻尼，以便可以生成另一个井下卡。
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公开(公告)号：EP2771541A2
公开(公告)日：2014-09-03
申请号：EP12844402.3
申请日：2012-10-29
发明人： PONS, Victoria, M.
CPC分类号： F04B49/065 , E21B43/127 , E21B47/0008 , E21B2043/125 , F04B47/022 , F04B49/20 , F04B51/00 , F04B2201/121 , F04B2201/1211 , G05B13/042
摘要： Diagnosing a pump apparatus having a downhole pump disposed in a deviated wellbore characterizes axial and transverse displacement of a rod string with two coupled non-linear differential equations of fourth order, which include axial and transverse equations of motion. To solve the equations, derivatives are replaced with finite difference analogs. Initial axial displacement of the rod string is calculated by assuming there is no transverse displacement and solving the axial equation. Initial axial force is calculated using the initial axial displacement and assuming there is no transverse displacement. Initial transverse displacement is calculated using the initial axial force and the initial axial displacement. Axial force and friction force are calculated using the initial displacements, and the axial displacement at the downhole pump is calculated by solving the axial equation with the axial force and the friction force. Load at the downhole pump is calculated so a downhole card can be generated.
摘要翻译： 泵装置具有设置在井筒中的井下泵，并且在井筒的表面具有马达，井下泵通过由马达可操作地移动的杆串在井眼中往复运动。 使用表面测量和具有阻尼因子或两个阻尼因子的波动方程模型来产生指示井下泵的载荷和位置的卡。 实际的流体载荷线由井下卡的井下泵的上行程和下行程确定，以及从井下数据的载荷分布计算出的流体载荷线。 将实际流体负载管线与计算的流体负荷管线进行比较，使得可以基于比较来修改泵装置的至少一个参数。 例如，可以调整波动方程模型的阻尼，从而可以产生另一个井下卡。
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公开(公告)号：EP2771541B1
公开(公告)日：2017-08-09
申请号：EP12844402.3
申请日：2012-10-29
发明人： PONS, Victoria, M.
CPC分类号： F04B49/065 , E21B43/127 , E21B47/0008 , E21B2043/125 , F04B47/022 , F04B49/20 , F04B51/00 , F04B2201/121 , F04B2201/1211 , G05B13/042
摘要： Diagnosing a pump apparatus having a downhole pump disposed in a deviated wellbore characterizes axial and transverse displacement of a rod string with two coupled non-linear differential equations of fourth order, which include axial and transverse equations of motion. To solve the equations, derivatives are replaced with finite difference analogs. Initial axial displacement of the rod string is calculated by assuming there is no transverse displacement and solving the axial equation. Initial axial force is calculated using the initial axial displacement and assuming there is no transverse displacement. Initial transverse displacement is calculated using the initial axial force and the initial axial displacement. Axial force and friction force are calculated using the initial displacements, and the axial displacement at the downhole pump is calculated by solving the axial equation with the axial force and the friction force. Load at the downhole pump is calculated so a downhole card can be generated.
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