建立了一个描述＂U＂型管式地热井下换热器在导热型地温梯度场内热性能的数学模型。
A pure conduction model is used for modelling the performance of "U"shape downhole heat exchangers (DHEs).
井下随钻流量监测技术具有很高的监测精度，能够对井眼压力进行更加精细的控制，还能够对压力梯度范围很好的确定。
The technology of monitoring well bottom while drilling has high precision, which can control borehole pressure more precise, but also the scope of the pressure gradient is well established.
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