启封透孔偏斜的原因及处理措施

Cause of Deflection in Unsealing and the Treatment Measures

摘要:

煤田地质钻探对已竣工钻孔进行启封透孔取心可揭露封孔的真实情况，对封闭段质量作出全面评价。但由于竣工钻孔到启封透孔施工间隔时间较长，如果施工方法不当易造成将孔透斜。为提高启封透孔成功率，应根据实际情况进行分析研究，制订预防透孔偏斜的措施。在分析启封透孔偏斜的主要原因的基础上提出了预防措施，总结了处理透孔偏斜的技术措施，并用实例说明了这些措施的可行性。

Abstract:

In geological drilling of coalfield, the borehole condition is revealed by unsealing the grouted horehole, but because of the long interval between construction and unsealing, sometimes deflection will occur. The paper analyzed the main cause of the deflection with prevention measures put forward, summarized the treatment on borehole unsealing deflection with successful field cases.