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公开(公告)号：US5572416A
公开(公告)日：1996-11-05
申请号：US255624
申请日：1994-06-09
IPC分类号： H02M7/06 , H02M1/00 , H02M1/42 , H02M3/155 , H02M3/156 , H02M7/12 , H02M7/217 , H03F1/34 , H02M7/04 , G05F1/625
CPC分类号： H02M1/4225 , H02M3/156 , H02M2001/0009 , Y02B70/126 , Y02P80/112
摘要： A converter for enhancing power factor utilizes a line sense winding magnetically coupled to sense a voltage across a line inductor in the input of a high power factor power converter. This winding in the illustrative embodiment is typically a single turn. This winding provides a measurement of the derivative (with respect to time) of the line current, and a specially designed integrator connected to the winding provides the estimate of the line current. An integrator is operative to accurately estimate the current by using known properties of this current to prevent mismeasurement due to reconstructing the "constant of integration" and any small biases in the integrator which normally cause errors.
摘要翻译： 用于增强功率因数的转换器利用磁耦合的线路感测绕组来感测高功率因数功率转换器输入端的线路电感器上的电压。 在说明性实施例中的该绕组通常是单回转。 该绕组提供线路电流的导数（相对于时间）的测量，并且连接到绕组的专门设计的积分器提供线路电流的估计。 积分器可以通过使用该电流的已知属性来准确地估计电流，以防止由于重建“积分常数”而导致的误测量以及通常导致误差的积分器中的任何小偏差。
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公开(公告)号：US06646895B1
公开(公告)日：2003-11-11
申请号：US10057326
申请日：2001-10-25
申请人： Mark E. Jacobs , Robert J. Murphy, Jr. , Ramanujam Ramabhadran , Thomas G. Wang , Shashank S. Wekhande
发明人： Mark E. Jacobs , Robert J. Murphy, Jr. , Ramanujam Ramabhadran , Thomas G. Wang , Shashank S. Wekhande
IPC分类号： H02M3335
CPC分类号： H02M3/33561 , H02M3/33569 , H02M2001/0006
摘要： A bias supply circuit and a method of operating a bias supply circuit for use with a switching power supply employing a main switch and an auxiliary switch and having an input voltage and a voltage across a clamp capacitor coupled to a transformer. In one embodiment, the bias supply circuit includes a bias supply winding associated with the transformer and configured to provide a first voltage dependent on at least one of the input voltage and the voltage across the clamp capacitor during a conduction period of the main switch or the auxiliary switch. Additionally, the bias supply circuit further includes a bias supply storage capacitor coupled to the bias supply winding and configured to provide a second voltage dependent on at least another of the input voltage and the voltage across the clamp capacitor during a conduction period of another of the main switch or the auxiliary switch. A sum of the first voltage and the second voltage provides a bias supply voltage.
摘要翻译： 一种偏置电源电路和一种用于与采用主开关和辅助开关的开关电源一起使用并具有耦合到变压器的钳位电容器两端的输入电压和电压的偏置电源电路的方法。 在一个实施例中，偏置电源电路包括与变压器相关联的偏置电源绕组，并且被配置为在主开关的导通时段期间提供取决于钳位电容器两端的输入电压和电压中的至少一个的第一电压， 辅助开关 此外，偏置电源电路还包括耦合到偏置电源绕组的偏置电源存储电容器，并且被配置为在另一个的另一个的导通周期期间提供取决于钳位电容器两端的输入电压和电压中的至少另一个的第二电压 主开关或辅助开关。 第一电压和第二电压的总和提供偏置电源电压。
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公开(公告)号：US5677478A
公开(公告)日：1997-10-14
申请号：US642774
申请日：1996-05-03
CPC分类号： F16K17/162 , Y10T137/1714
摘要： A replaceable primary rupture disk placed in the main body of a cylindrical test chamber functions as a safety device and ruptures to relieve pressure from the chamber when the pressure exceeds a selected maximum value. A free piston that is moveable within the cylindrical to separate the chamber into two variable volume compartments is equipped with a replaceable secondary rupture disk that limits the pressure differential across the piston. The secondary disk ruptures at a pressure differential lower than that required to rupture the primary disk. The maximum pressure that can be contained in any chamber is a pressure equal to the sum of the secondary and primary rupture pressures. The maximum pressure that can be contained in one compartment, if the other is at atmospheric pressure, is the burst pressure of the secondary disk. Threaded end caps are provided with seals that disengage before the threads disengage to bleed down any trapped pressure in the chamber while simultaneously holding the caps to the chamber. Radial spanner wrench openings extending through the cap end are used for tightening and removing the cap and as handling attachment points when the chamber is hot.
摘要翻译： 放置在圆柱形测试室的主体中的可替换的初级破裂盘用作安全装置，并且当压力超过所选择的最大值时，破裂以释放来自腔室的压力。 可在圆柱体内移动以将腔室分离成两个可变容积的隔间的自由活塞装备有可更换的次级破裂盘，其限制活塞两端的压力差。 次级盘在低于破裂主盘所需的压差的压差下破裂。 任何室中可以容纳的最大压力是等于次级和初级破裂压力之和的压力。 如果另一个在大气压下，可以容纳在一个隔室中的最大压力是次级盘的爆破压力。 螺纹端盖设置有在螺纹脱离之前脱离的密封件，以便同时将盖子保持在室中，从而排出腔室中的任何捕获的压力。 通过帽端延伸的径向扳手开口用于紧固和拆卸盖子，以及当室内热时处理附着点。
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公开(公告)号：US06584833B1
公开(公告)日：2003-07-01
申请号：US10162795
申请日：2002-05-30
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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公开(公告)号：US5703278A
公开(公告)日：1997-12-30
申请号：US642716
申请日：1996-05-03
CPC分类号： G01N9/04
摘要： A conventional fluid density balance beam measurement instrument used for measuring fluid density at atmospheric pressure is converted for use to measure fluid density at super-atmospheric pressure. The conversion is made without modifying the structure of the conventional instrument. A pressure lid, placed over the open mouth of the instrument's sample cup, is held in place by a removable retaining structure that wraps around the base of the cup. A screw ring at the top of the retainer applies a retaining pressure against the lid. Pressure is applied to the cup through a check valve stem extending through the lid. An adjustable flange on the rim of the lid permits the lid to advance into the cup to change the cup volume for sizing the cup to obtain a precisely known volume for measurement. A counterweight is removably connected to the balance beam to compensate for the weight added by the lid and retaining structure. A weight compartment in the counterweight permits the addition of small amounts of weight to calibrate the balance beam. The lid, retaining structure and counterweight are removable to return the instrument to its conventional configuration for normal atmospheric measurements.
摘要翻译： 用于测量大气压下的流体密度的常规流体密度平衡光束测量仪器被转换用于在超大气压力下测量流体密度。 在不改变常规仪器的结构的情况下进行转换。 放置在仪器样品杯的开口上的压力盖通过围绕杯底部的可移除的保持结构保持在适当的位置。 保持架顶部的螺纹环对盖子施加保持压力。 压力通过延伸穿过盖子的止回阀杆施加到杯子上。 在盖的边缘上的可调节法兰允许盖进入杯中以改变杯体积以调整杯的尺寸，以获得精确的已知体积用于测量。 配重可拆卸地连接到平衡梁以补偿由盖子和保持结构添加的重量。 配重中的重量隔间允许添加少量重量来校准平衡梁。 盖子，保持结构和配重是可移除的，以将仪器返回其常规配置，用于正常大气测量。
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公开(公告)号：US06543276B2
公开(公告)日：2003-04-08
申请号：US09861362
申请日：2001-05-18
IPC分类号： G01N1504
CPC分类号： G01N15/08
摘要： A method and apparatus for determining the effectiveness and reaction time of a breaker fluid in breaking a filter cake on the wall of a wellbore penetrating a subterranean formation is disclosed. The method comprises employing an apparatus, such as for example the apparatus of the invention with a filter medium and the capability of applying differential pressure or dynamic conditions to form a filter cake on the filter medium with drilling mud. Breaker fluid is then substituted for the drilling mud, preferably without damage to the filter cake. The quantity of breaker fluid passing across the filter medium under static conditions is monitored over time. An increase in the rate of fluid passing across or through the medium indicates break-up of the filter cake.
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公开(公告)号：US4571988A
公开(公告)日：1986-02-25
申请号：US631237
申请日：1984-07-16
摘要： The present invention is directed to an apparatus and method for measuring the viscosity of a fluid. This apparatus and method is particularly useful for the measurement of the viscosity of a liquid in a harsh environment characterized by high temperature and the presence of corrosive or deleterious gases and vapors which adversely affect conventional ball or roller bearings. The apparatus and method of the present invention employ one or more flexural or torsional bearings to suspend a bob capable of limited angular motion within a rotatable sleeve suspended from a stationary frame.
摘要翻译： 本发明涉及一种用于测量流体粘度的装置和方法。 该装置和方法特别适用于在恶劣环境中测量液体的粘度，其特征在于高温和存在对常规滚珠或滚子轴承产生不利影响的腐蚀性或有害气体和蒸气。 本发明的装置和方法采用一个或多个弯曲或扭转轴承来悬挂悬挂在固定框架上的可旋转套筒内能够进行有限角动作的摆锤。
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8.发明授权公开(公告)号：US06906535B2
公开(公告)日：2005-06-14
申请号：US10137681
申请日：2002-05-02
CPC分类号： C09K8/36 , G01N27/92 , G01N33/2823
摘要： A method is provided for characterizing emulsion stability to evaluate suitability of the emulsion for use as a drilling fluid in drilling subterranean boreholes. The method provides a supplement or alternative to the standard method of determining Electrical Stability of the emulsion. In the method of the invention, Breakdown Energy is calculated. Breakdown Energy can be measured at the same test point as Electrical Stability. A digital storage oscilloscope and a computer are used in addition to an electrical stability meter.
摘要翻译： 提供了一种用于表征乳液稳定性以评估用于钻井地下钻孔中的钻井液的乳液的适用性的方法。 该方法提供了确定乳液电气稳定性的标准方法的补充或替代方法。 在本发明的方法中，计算击穿能量。 击穿能量可以在与电气稳定性相同的测试点测量。 使用数字存储示波器和计算机以及电气稳定度计。
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公开(公告)号：US06604852B1
公开(公告)日：2003-08-12
申请号：US09733825
申请日：2000-12-09
IPC分类号： G01N2504
CPC分类号： G01N25/147 , G01N21/532 , G01N21/8507 , G01N25/04
摘要： An apparatus and method for determining the crystallization point of high pressure fluids comprising brine are disclosed. The apparatus comprises a temperature probe and an optical fiber probe to determine the temperature of formation and dissolution of crystals during cooling and warming cycles. The apparatus further comprises a pressurization source, preferably a positive displacement pump or connection to a positive displacement pump for pressurizing the sample. The apparatus further preferably includes a jacket for circulating coolant or heat transfer fluid to facilitate cooling of the sample. The method of the invention uses the apparatus of the invention to determine crystallization point of fluid samples.
摘要翻译： 公开了一种用于确定包含盐水的高压流体的结晶点的装置和方法。 该装置包括温度探针和光纤探针，以确定在冷却和加热循环期间晶体形成和溶解的温度。 该装置还包括加压源，优选为容积式泵或与用于对样品加压的容积式泵的连接。 该装置还优选地包括用于使冷却剂或传热流体循环以便于冷却样品的护套。 本发明的方法使用本发明的装置来确定流体样品的结晶点。
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公开(公告)号：US4606891A
公开(公告)日：1986-08-19
申请号：US625771
申请日：1984-06-28
CPC分类号： G01N17/02
摘要： The present invention is directed to an apparatus and method for holding one or more test electrodes of precisely known exposed surface area. The present invention is particularly useful in a device for determining the corrosion properties of the materials from which the test electrodes have been formed. The present invention relates to a device and method for holding the described electrodes wherein the exposed surface area of the electrodes is only infinitesimally decreased. Further, in the present invention the exposed, electrically conductive surface area of the contact devices is small relative to the test electrode surface area. The holder of the present invention conveniently comprises a device for contacting and engaging each test electrode at two point contacts infinitesimally small in relation to the exposed surface area of the electrodes.
摘要翻译： 本发明涉及一种用于保持具有精确已知的暴露表面积的一个或多个测试电极的装置和方法。 本发明特别可用于确定已形成测试电极的材料的腐蚀性能的装置。 本发明涉及一种用于保持所述电极的装置和方法，其中电极的暴露表面积仅仅是微不足道地减小。 此外，在本发明中，接触装置的暴露的导电表面积相对于试验电极表面积较小。 本发明的保持器方便地包括用于在两个点接触处接触和接合每个测试电极的装置，其极小地相对于电极的暴露表面积。
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