公开(公告)号：US5201220A

公开(公告)日：1993-04-13

申请号：US942005

申请日：1992-09-08

申请人： Oliver C. Mullins ,  Daniel R. Hines ,  Masaru Niwa ,  Kambiz A. Safinya

发明人： Oliver C. Mullins ,  Daniel R. Hines ,  Masaru Niwa ,  Kambiz A. Safinya

IPC分类号： E21B47/10 ,  E21B49/10 ,  G01N21/43

CPC分类号： G01N21/43 ,  E21B47/102 ,  E21B49/10

摘要： A borehole apparatus detects the presence of gas within a formation fluid sample. A light source transmits light rays to an interface between the fluid sample and the flow line. The interface reflects the light rays toward a detector array. The detector array detects light rays having angles of incidences extending from less than the Brewster angle to more than the critical angle for gas. A data base stores information concerning the Brewster angle and critical angle of gas for a plurality of gas volume categories. A processor determines the percentage of gas present in the formation fluid sample and categorizes the fluid sample as high as, medium gas, low gas, and no gas based on the signal from the detector array and the information from the data base.

摘要翻译： 井眼装置检测地层流体样品中气体的存在。 光源将光线传输到流体样品和流动管线之间的界面。 该界面将光线朝向检测器阵列反射。 检测器阵列检测从小于布鲁斯特角延伸到大于气体临界角的发生角度的光线。 数据库存储关于多个气体体积类别的布鲁斯特角和气体临界角的信息。 处理器确定存在于地层流体样品中的气体的百分比，并且基于来自检测器阵列的信号和来自数据库的信息将流体样品分类为高达，中等气体，低气体和无气体。

公开(公告)号：US6111340A

公开(公告)日：2000-08-29

申请号：US290316

申请日：1999-04-12

申请人： Bikash K. Sinha ,  Masaru Niwa ,  Noriyuki Matsumoto ,  Yukio Sudo

发明人： Bikash K. Sinha ,  Masaru Niwa ,  Noriyuki Matsumoto ,  Yukio Sudo

IPC分类号： G01L9/00 ,  H01L41/08

CPC分类号： G01L9/0022

摘要： A dual-mode thickness-shear quartz pressure transducer includes a unitary piezoelectric crystal resonator and cylindrical housing structure wherein the resonator is located on a median radial plane of the housing and the exterior of the housing is provided with a pair of parallel flat surfaces which are located at an angle relative to the X" axis of the resonator. According to the presently preferred embodiment, the transducer is made from an SC-cut or a WAD-cut solid quartz crystal cylinder which is ultrasonically milled to form a plano-convex or bi-convex resonator disk in the medial radial plane of a hollow cylinder and the pair of exterior flats. The wall thickness of the cylinder is altered at the location of the flats such that stresses at the center of the resonator disk are anisotropic. According to the invention, the ratio of the stresses at the center of the resonator disk along the X" and Z" axes are optimized such that the pressure sensitivity of the third thickness harmonic of C mode vibration is maximized. Optimization of the ratio of the stresses along the X" and Z" axes is accomplished in particular by altering the (azimuthal) angle of the flats. According to a presently preferred embodiment of the invention, the flats are located at an azimuthal angle of approximately 134.degree. relative to the X" axis of a WAD-cut resonator.

摘要翻译： 双模式厚度剪切石英压力传感器包括单一压电晶体谐振器和圆柱形壳体结构，其中谐振器位于壳体的中间径向平面上，并且壳体的外部设置有一对平行的平坦表面， 相对于谐振器的X'轴成一定角度。 根据目前的优选实施例，换能器由SC切割或WAD切割的固体石英晶体圆柱体制成，其被超声磨削以在中空圆筒的中间径向平面中形成平凸或双凸共振器圆盘 和一对外部单位。 气缸的壁厚在平面的位置处改变，使得谐振器盘的中心处的应力是各向异性的。 根据本发明，谐振器盘沿X“和Z”轴的中心处的应力比被优化，使得C模式振动的第三厚度谐波的压力灵敏度最大化。 通过改变平面的（方位角）角度，可以优化沿X“和Z”轴的应力比例的优化。 根据本发明的当前优选实施例，平面相对于WAD切割谐振器的X“轴位于大约134度的方位角。

公开(公告)号：US5167149A

公开(公告)日：1992-12-01

申请号：US574317

申请日：1990-08-28

申请人： Oliver C. Mullins ,  Daniel R. Hines ,  Masaru Niwa ,  Kambiz A. Safinya

发明人： Oliver C. Mullins ,  Daniel R. Hines ,  Masaru Niwa ,  Kambiz A. Safinya

IPC分类号： E21B47/10 ,  E21B49/10 ,  G01N21/43

CPC分类号： E21B47/102 ,  E21B49/10 ,  G01N21/43

摘要： A borehole apparatus detects the presence of gas within a formation fluid sample. A light source transmits light rays to an interface between the fluid sample and the flow line. The interface reflects the light rays toward a detector array. The detector array detects light rays having angles of incidences extending from less than the Brewster angle to more than the critical angle for gas. A data base stores information concerning the Brewster angle and critical angle of gas for a plurality of gas volume categories. A processor determines the percentage of gas present in the formation fluid sample and categorizes the fluid sample as high gas, medium gas, low gas, and no gas based on the signal from the detector array and the information from the data base.