保证了水泥浆返出地面，有利于提高固井质量。
It can ensure the slurry returning to surface, thus improve the cementing quality.
返出泥浆减少。
这种射流洗井器应用射流原理进行设计，利用高压注入水作动力液，抽汲地层液返出。
The device is designed by means of the jetting principle, and it takes the high-pressure injected water as power fluid to drive the formation fluid returning to the surface.
返出的岩屑需要处理，而且不能回收利用，这不仅加大了泥浆损失，还增加了处理成本。
The cuttings require disposal and cannot be recovered, which results in mud loss as well as disposal costs.
在下入表层套管且注水泥之前，方井同样接受从井眼内返出的、必须被泵回到地表泥浆设备中的泥浆。
Prior to setting surface casing, the cellar also takes mud returns from the well, which are pumped back to the surface mud equipment.
对石油钻井过程中岩石破碎的分形机理及形成过程进行了研究，提出了一种以井底返出的岩屑为对象测试岩石可钻性的新方法。
This method takes the detritus returned from bottom hole as the studying object. The fractal mechanism and forming process of broken rock during drilling were studied.
对石油钻井过程中岩石破碎的分形机理及形成过程进行了研究，提出了一种以井底返出的岩屑为对象测试岩石可钻性的新方法。
This method takes the detritus returned from bottom hole as the studying object. The fractal mechanism and forming process of broken rock during drilling were studied.
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