公开(公告)号：EP3118409A1

公开(公告)日：2017-01-18

申请号：EP16179811.1

申请日：2016-07-15

申请人： Weatherford Technology Holdings, LLC

发明人： PONS, Victoria M. ,  ALLISON, Anthony P. ,  GOMES, Jeremy

IPC分类号： E21B43/12 ,  E21B47/00

CPC分类号： E21B47/0007 ,  E21B43/127 ,  E21B47/0008 ,  F04B47/022 ,  F04B49/065 ,  F04B49/22 ,  F04B2201/0201 ,  F04B2201/0601 ,  F04B2201/121 ,  G05B19/042 ,  G05B2219/43193 ,  G05D7/0676

摘要： Techniques and apparatus are provided for improved diagnostics of downhole dynamometer data for control and troubleshooting of reciprocating rod lift systems. A method for pump fillage determination for a reciprocating rod lift system is provided. The method generally includes measuring downhole data during a pump cycle, wherein the downhole data comprises a first plurality of data points associated with an upstroke of the pump cycle and a second plurality of data points associated with a downstroke of the pump cycle, each data point comprising a rod position value and an associated rod load value; converting the data points to non-dimensional data points, calculating non-dimensional slope values between non-dimensional data points; and determining pump fillage based, at least part, on the calculated non-dimensional slope values.

摘要翻译： 提供了用于改进的，用于控制和往复杆提升系统的故障诊断井下测力计数据的诊断技术和装置。 本发明提供一种用于泵送填充率判定为一个往复杆升降系统的方法。 该方法的基因集会包括泵送周期期间测量的井下数据，worin井下数据包括数据点的第一多个与泵送循环和与所述泵送循环的冲程相关联的数据点的第二多个，每个数据点的上冲程相关联 包括杆位置值和在相关联的杆的负载值; 转换数据点到无量纲的数据点，在计算无量纲的数据点之间的无量纲的斜率值; 和确定性采矿泵填充率基于，至少部分地基于所计算出的无量纲的斜率值。

公开(公告)号：EP2776714A1

公开(公告)日：2014-09-17

申请号：EP12855283.3

申请日：2012-10-29

申请人： Weatherford/Lamb, Inc. ,  Pons, Victoria M.

发明人： PONS, Victoria M.

IPC分类号： F04B43/12

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.