When drill hole in sandy soil the desander should be timely turned on to reduce the sand content and ensure the drilling progressing and stability of the hole.
在砂土层中钻进时，要及时开启泥
器，降低含砂率，保
钻进速度和孔壁
。
When drill hole in sandy soil the desander should be timely turned on to reduce the sand content and ensure the drilling progressing and stability of the hole.
在砂土层中钻进时，要及时开启泥器，降低含砂率，保钻进速度和孔壁。
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