The Design And Research On Downhole Float Flow-mete

In crude oil mining process, in order to determine various oil wells from the crude oil, the natural gas output, understood the stratumhydrocarbon content and the stratal configuration change, needs todeliver in the fluid to the oil well each level to deliver the current capacity, carries on the continual measurement and provides the real-time measurement data, optimizes the production parameter, enhances the recovery ratio. However, at present delivers in the section plane oil well logging in the production log, the current capacity mainly carries on the survey with the turbine meter, thet urbine meter has the start displacement high, has the rotation components, the survey the viscosity influence, the installment and the service quality flaw and so on human factor influence, regarding survey smaller current capacity then is helpless, but the present mineshaft oil layer actually has very many is the small current capacity oil layer. In the center small flow measurement, the float flow-meteris playing the count for much role. The float flow meter survey keylies in to the float position precision measuring.At present in domestic uses in the small flow measurement float flow-meter introduction product and the domestically produced product, mostly uses the cam mechanism to carry on the current capacity computation. This way existence machinery wears, the precision low and sluggish and so on the flaw, causes the small current capacity signal survey the error to be bigger.This article studies one kind to be suitable for the small fluid signal examination float flow-meter, this flow-meter based on the helical tube coil type self inductance sensor principle, through thefloat connection armature, the change which moves the float transform sthrough the mutual inductance into the voltage change to accurately reflects the float the position, again through electric cable signalling ground, thus in scene accurate reflection mine shaft various oil layers liquid current capacity.