公开(公告)号：US4917349A

公开(公告)日：1990-04-17

申请号：US329930

申请日：1989-03-29

申请人： Jim B. Surjaatmadja ,  Mark C. Ehlert

发明人： Jim B. Surjaatmadja ,  Mark C. Ehlert

IPC分类号： F16K31/122 ,  G05D16/20

CPC分类号： G05D16/2013 ,  F16K31/1226 ,  Y10T137/7761

摘要： A set point pressure control circuit is disclosed for controlling pressure in a high pressure environment. The circuit includes a high pressure communicating, low pressure actuated valve. The valve includes a housing in which a valve member is disposed. The valve member has an axial passageway defined therethrough for communicating a high pressure port across a piston of the valve member to an opposite high pressure chamber which is placed in communication with a low pressure port when the valve member is in an open position.

公开(公告)号：US4622846A

公开(公告)日：1986-11-18

申请号：US795290

申请日：1985-11-05

申请人： John J. Moon, Jr. ,  Jim B. Surjaatmadja ,  Mark C. Ehlert

发明人： John J. Moon, Jr. ,  Jim B. Surjaatmadja ,  Mark C. Ehlert

IPC分类号： G01N11/14

CPC分类号： G01N11/14

摘要： An appartus and method for testing characteristics of a substance, such as a cement slurry to be used within an oil or gas well, are provided. The apparatus includes a single drive motor which can be actuated in either a dynamic mode or a static mode to measure, in the preferred embodiment, either consistency or static gel strength of the substance. A single display is switchably connectible to one of two scaling circuits which scale a single transducer output signal to provide the desired measurement.

摘要翻译： 提供了一种用于测试物质特性的方法，例如在油或气井内使用的水泥浆。 该装置包括可在动态模式或静态模式下被致动的单个驱动马达，在优选实施例中，测量该物质的一致性或静态凝胶强度。 单个显示器可切换地连接到两个缩放电路中的一个，其缩放单个换能器输出信号以提供期望的测量。

公开(公告)号：US4829811A

公开(公告)日：1989-05-16

申请号：US179164

申请日：1988-04-08

申请人： Mark C. Ehlert ,  James W. Mueller

发明人： Mark C. Ehlert ,  James W. Mueller

IPC分类号： G01N11/14

CPC分类号： G01N11/14

摘要： A fluid testing apparatus comprises a container for holding a fluid to be tested and a member disposed within the container so that the member is rotatable within a fluid to be tested within the container. The container has a wall defining a cavity into which the member extends. A magnetically responsive rotor is mounted on this end of the member. Immediately adjacent the outside surface of this wall, a plurality of stator poles are secured so that a field generated in the stator poles directly interacts with the rotor across the wall to rotate the member. The rotor and stator poles are preferably of a stepper motor.

摘要翻译： 流体测试装置包括用于保持要测试的流体的容器和设置在容器内的构件，使得构件可在容器内待测试的流体内旋转。 该容器具有限定一个空腔的壁，该构件延伸到该腔中。 一个磁响应转子安装在该构件的这一端上。 紧邻该壁的外表面，固定多个定子极，使得在定子极中产生的场直接与转子相互作用，跨过壁旋转构件。 转子和定子极优选为步进电动机。