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介绍了用绳索取心技术钻进中深孔的经验:①通过使用优质泥浆、控制孔内激动压力,减少提钻次数,以稳定孔壁,实现深井裸眼钻进;②增大钻具与孔壁间的通水闻隙,减少泥浆固相含量,控制泵量与转速,以降低泵压;③选用优质钻头,钻具,根据孔深、岩性合理改变工艺参教,以获得高时效;加大回次进尺和提钻间隔,以减少辅助时间。
The experience of drilling middle-deep hole with rope coring technique is introduced: ① Through the use of high-quality mud, the excitement pressure in the hole can be controlled and the number of drilling can be reduced to stabilize the hole wall to realize deep hole drilling. The wall of the water smell gap to reduce the mud solid content, control the pump speed and speed, to reduce the pump pressure; â ’¢ selection of high quality drill, drill, according to the hole depth, lithology reasonably change the process of reference to obtain high aging; Increase the footage and pull-in interval to reduce auxiliary time.