自热耗散式油井注入液体流速传感器

结合油田井下流速测量的特点，论述了一种适用于井下测量的低流速、高粘度油井注入液体流速检测的新型传感器。该传感器采用ＰＴＣＲ自热耗散原理检测油井注入液体流速。解决了井下空间狭窄、流体粘度大、工作温度偏高、环境压力偏大等测量难题。设计并制造了井下ＰＴＣＲ热耗散式流速传感器。实验和试用结果表明，该传感器具有良好的重复性和可靠性，对石油测井具有很大使用价值。

Based Self-Heating Dissipation Flow Velocity Sensor of the Liquid Injected into the Oil Well

Taking into consideration the characteristics of the under-well measurement of flow velocity, this paper discusses a new sensor for measurement of flow velocity of the injected liquid into the oil well that is low in velocity and high in viscosity, suitable for the under-well measurement. This sensor is based the theory on self-heating dissipation of PTCR. It solved the measurement problem that is little under-well space, high liquid viscosity and high operation temperature. We designed and made the entire under-well PTCR heated dissipation velocity sensor. Experiment states this sensor is good in performance, and there are great useful value for oil produce.