A Visual Test Apparatus for Flushing Fluid Evaluation and the Evaluation Method
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摘要: 目前,国内外对冲洗液冲洗效率的评价没有统一的方法和手段,近年来也有一些评价装置的研制与使用,但不能真实模拟现场,不能定量评价冲洗液性能。中原固井公司结合现场实际应用,设计了一种冲洗液评价装置与方法,该装置主要由储液罐、循环泵、流量调节阀、流量计、模拟井筒、回流管、温控加热器、排液口、滚轮等组成,能够模拟现场冲洗液的配比、冲洗时间、冲洗流速等技术参数,同时,井筒采用透明玻璃管,实现冲洗效果可视化。其可以根据目视结果更加准确地确定冲洗时间,同时也便于调整并确定达到最佳冲洗效果的临界流速,是一种既能定量又很直观地评价冲洗效果的装置,能够充分满足现场需要。Abstract: In flushing fluid evaluation,no standardized methods are available;some evaluation apparatus developed in recent years are not able to simulate the real situation of field operation,and quantitatively evaluate the performance of flushing fluid.A new visual test apparatus for flushing fluid evaluation has recently been developed,which consists of fluid storage tank,circulation pump,flow rate controller,flow meter,simulated wellbore,backflow conduit,heating device,liquid drain,and roller.This apparatus is able to simulate the formulation of flushing fluid,flushing time and flow rate etc.,and the flushing performance can be visually checked because a transparent glass pipe is used as the simulated borehole.The flushing time can be determined by visualization and the critical flow rate can be determined for optimum flushing.As a quantitative,visual evaluation apparatus,it is able to satisfy the needs for field application.
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Key words:
- Well cementing /
- Flushing fluid /
- Flushing efficiency /
- Visual evaluation apparatus
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