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1. 发明授权

US06584833B1 Apparatus and method for analyzing well fluid sag 有权
标题翻译：用于分析井下流体凹陷的装置和方法
公开(公告)号：US06584833B1
公开(公告)日：2003-07-01
申请号：US10162795
申请日：2002-05-30
申请人： Dale E. Jamison , Robert J. Murphy, Jr.
发明人： Dale E. Jamison , Robert J. Murphy, Jr.
IPC分类号： G01N3340
CPC分类号： E21B49/005 , G01N15/04 , G01N2011/0053 , G01N2203/0025 , G01N2203/0676
摘要： An apparatus and method are disclosed for measuring or analyzing dynamic and static sag caused by settling of weighting materials in drilling fluids or other solids bearing fluid. The apparatus comprises a tube and shear shaft assembly that allows for a controlled rate of shear to be applied to a sample of the fluid for testing. During a test, the assembly is placed on a pivotal holder at an angle. The assembly has pistons at the pivot center of the assembly which accommodate expansion and contraction of the test fluid due to changes in temperature and pressure, thereby allowing the test fluid to be heated, cooled and pressurized to simulate subterranean wellbore conditions without changing the center of mass of the test fluid. When weight material settles down the inclined assembly, the center of mass of the assembly changes resulting in changing torque or moment about the pivotal holder. The resultant moment is measured by energizing external coils arranged to provide a uniform magnetic field. The bulk average settling rate is determined using the measured coil current rate of change.
摘要翻译：公开了一种用于测量或分析由钻井液或其他固体载体流体中的称重材料沉降引起的动态和静态下垂的装置和方法。该装置包括管和剪切轴组件，其允许将受控的剪切速率施加到用于测试的流体样品。在测试期间，组件以一定角度放置在枢转保持器上。该组件在组件的枢转中心处具有活塞，其适应由于温度和压力的变化引起的测试流体的膨胀和收缩，从而允许测试流体被加热，冷却和加压以模拟地下井眼条件而不改变测试流体的中心质量的测试流体。当重量材料沉降在倾斜组件上时，组件的质心发生变化，从而导致枢转保持器周围的扭矩或力矩发生变化。所得到的时刻是通过激励设置成提供均匀磁场的外部线圈来测量的。使用测量的线圈电流变化率确定体积平均建立速率。

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