Core barrel blockage usually occurs in the unconsolidated and broken sand formation coring.If this is not detected in time then the core will be worn out easily, and the data will be lost.

• 在疏松及破碎砂岩地层取心时,经常会遇到的问题是堵心或卡心,若没有及时发现容易磨心,使资料丢失。