Construction Technology of Coring Drilling in Medium-deep Hole in Complex Formation of Sijiaying Iron Mine

Abstract:

Improving drilling efficiency in medium-deep hole is key point for coring drilling construction, especially for the medium-deep holes of 500-1000m. With the deep drilling case of Sijiaying iron mine, the paper discussed the construction method and the experience.

Key words:medium-deep hole; coring drilling; drilling efficiency; borehole wall protection; case