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
时，要及时开启泥浆
离器，降低含砂率，保
速度和孔壁的稳定。
孔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.
在砂土层时，要及时开启泥浆离器，降低含砂率，保速度和孔壁的稳定。
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