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公开(公告)号：EP0513718A3
公开(公告)日：1993-11-10
申请号：EP92107932.3
申请日：1992-05-12
发明人： Angehrn, Jorg A.
CPC分类号： H04N7/185 , E21B47/0002 , G01V1/52
摘要： A method is disclosed for improving the signal-to-noise ratio of reflected echo signals produced by an acoustic transducer in a borehole televiewer. An array of acoustic receivers is used in close enough proximity to the transducer to receive the reflected echo signals as directly reflected signals. The array of receivers can be arranged both above and below the transducer, either rotating synchronously with the transducer or being stationary. The signals received by the receivers are analyzed to determine the true amplitude and angle of reflection of the reflected echo signals, and to determine the rugosity of the borehole wall.
摘要翻译： 公开了一种用于提高由井眼电视收音机中的声换能器产生的反射回波信号的信噪比的方法。 一组声学接收器被用在足够靠近传感器的位置，以便将反射回波信号作为直接反射的信号接收。 接收器阵列可以布置在换能器的上方和下方，与换能器同步旋转或静止。 分析由接收器接收的信号以确定反射回波信号的真实振幅和反射角度，并确定井壁的粗糙度。
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2.发明公开Method and apparatus for determining changes in length of a well logging cable 失效Verfahren und Apparat zur Determinierung vonLängeänderungeneines Bohrlochmesskabels。
公开(公告)号：EP0251671A2
公开(公告)日：1988-01-07
申请号：EP87305609.7
申请日：1987-06-24
发明人： Graebner, Peter , Sie, Swan A. , Angehrn, Jorg A.
CPC分类号： E21B47/04 , G01B11/043 , G01B11/161
摘要： A method and apparatus for determining the amount of stretch in a well logging cable is disclosed. An optical fibre (10) is run into a well with a logging cable (11) and looped back to the surface. A second optical fibre (14) of nominal length is maintained on the surface. A beam of monochromatic light from a source (17) is split and passed through both fibres and recombined. As the well logging tool (1) is raised and lowered into the wellbore, the number of interference fringes passing a fixed point is determined. The change in length of the optical fibre and, therefore, the cable will be equal to 1/2 the number of interference fringes passing a fixed point times the wavelength of light is used. A precise determination of vertical location of the well logging tool (1) can then be made when this information is combined with information from a surface mounted length measurement device, such as an odometer. This information further allows a precise determination of interval bulk density or other formation parameters in which it is important to know the depth of a tool.
摘要翻译： 公开了一种用于确定测井电缆中的拉伸量的方法和装置。 光纤（10）通过测井电缆（11）进入井并环回到表面。 标称长度的第二光纤（14）保持在表面上。 来自源（17）的单色光束被分裂并通过两根纤维并重新组合。 当测井工具（1）升高并降低到井筒中时，确定通过固定点的干涉条纹的数量。 光纤的长度变化，因此电缆的变化将等于使用光波长通过固定点的干涉条纹的数量的1/2。 然后，当将该信息与来自表面安装长度测量装置（例如里程表）的信息组合时，可以对测井工具（1）的垂直位置进行精确确定。 该信息进一步允许精确确定间隔体积密度或其它形成参数，其中重要的是知道工具的深度。
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公开(公告)号：EP0513718A2
公开(公告)日：1992-11-19
申请号：EP92107932.3
申请日：1992-05-12
发明人： Angehrn, Jorg A.
CPC分类号： H04N7/185 , E21B47/0002 , G01V1/52
摘要： A method is disclosed for improving the signal-to-noise ratio of reflected echo signals produced by an acoustic transducer in a borehole televiewer. An array of acoustic receivers is used in close enough proximity to the transducer to receive the reflected echo signals as directly reflected signals. The array of receivers can be arranged both above and below the transducer, either rotating synchronously with the transducer or being stationary. The signals received by the receivers are analyzed to determine the true amplitude and angle of reflection of the reflected echo signals, and to determine the rugosity of the borehole wall.
摘要翻译： 公开了一种用于提高由井眼电视收音机中的声换能器产生的反射回波信号的信噪比的方法。 一组声学接收器被用在足够靠近传感器的位置，以便将反射回波信号作为直接反射的信号接收。 接收器阵列可以布置在换能器的上方和下方，与换能器同步旋转或静止。 分析由接收器接收的信号以确定反射回波信号的真实振幅和反射角度，并确定井壁的粗糙度。
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4.发明授权Method and apparatus for determining changes in length of a well logging cable 失效用于确定井眼电缆长度变化的方法和装置
公开(公告)号：EP0251671B1
公开(公告)日：1991-12-18
申请号：EP87305609.7
申请日：1987-06-24
发明人： Graebner, Peter , Sie, Swan A. , Angehrn, Jorg A.
CPC分类号： E21B47/04 , G01B11/043 , G01B11/161
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5.发明公开Method and apparatus for determining changes in length of a well logging cable 失效用于确定井眼电缆长度变化的方法和装置
公开(公告)号：EP0251671A3
公开(公告)日：1989-07-05
申请号：EP87305609.7
申请日：1987-06-24
发明人： Graebner, Peter , Sie, Swan A. , Angehrn, Jorg A.
CPC分类号： E21B47/04 , G01B11/043 , G01B11/161
摘要： A method and apparatus for determining the amount of stretch in a well logging cable is disclosed. An optical fibre (10) is run into a well with a logging cable (11) and looped back to the surface. A second optical fibre (14) of nominal length is maintained on the surface. A beam of monochromatic light from a source (17) is split and passed through both fibres and recombined. As the well logging tool (1) is raised and lowered into the wellbore, the number of interference fringes passing a fixed point is determined. The change in length of the optical fibre and, therefore, the cable will be equal to 1/2 the number of interference fringes passing a fixed point times the wavelength of light is used. A precise determination of vertical location of the well logging tool (1) can then be made when this information is combined with information from a surface mounted length measurement device, such as an odometer. This information further allows a precise determination of interval bulk density or other formation parameters in which it is important to know the depth of a tool.
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