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January 2000
Volume 52    Issue 1

Effect of additives on drilling in hard rock

Mining Engineering, 2000, Vol. 52, No. 1, pp. 29-33
El-Shall, H.; Haecker, R.; Somasundaran, P.; Gupta, S.


ABSTRACT:
Improving drilling efficiency is of prime importance to the mineral and oil industries. Drilling is technically a material-disintegration process and is carried out by subjecting materials to different types of stresses, depending on the drilling bit and applied forces. As with any rock comminution process, drilling is inefficient as far as energy consumption is concerned. Therefore, a cost-effective improvement in the drilling rate is needed. Reported data in the literature indicate that the addition of chemical additives may produce beneficial drilling and grinding effects (Somasundaran and Lin, 1972; El-Shall, 1980; El-Shall and Somasundaran, 1984; Somasundaran and Shrotri, 1995). In addition, there could be unavoidable effects (both beneficial and detrimental) that arise from difficulties in controlling the chemical composition of the environment during drilling.


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