Method and apparatus for measuring the flow speed and the gas volume proportion of a liquid metal stream
RF Admittance apparatus and method for monitoring the contents of a pipe
Volumetric flow rate determination in conduits not directly accessible
Fluid-gauging probes and their manufacture
Cross correlation flowmeter
Liquid level sensor
ApplicationNo. 713226 filed on 06/11/1991
US Classes:73/861.08By measuring electrical or magnetic properties
ExaminersPrimary: Chilcot, Richard E. Jr.
Assistant: Dougherty, Elizabeth L.
Attorney, Agent or Firm
International ClassG01F 001/56
Foreign Application Priority Data1991-03-21 GB
AbstractA device (30) for sensing fluid behavior, e.g. flow, in a conduit (34) such as downhole in a well, comprises a tool (36) having two or more spaced sensors (38,40) for interacting with a medium within the conduit to produce data signals. The sensor data signals may be compared to determine movement of the medium within the conduit and about the device. The device is particularly suited for determining movement of multi-phase fluid.
Field of SearchBy measuring swirl rate imparted by static means
Reflection or scattering of acoustic waves
By measuring electrical or magnetic properties
With autocorrelation or cross-correlation detection
Having fringing field coupling
Including a guard or ground electrode
Including a probe type structure