Efficiency increase of hard rock destruction with the use of eccentric pulses

19th International Scientific Symposium in honor of Academician M.A. Usov "Problems of Geology and Subsurface Development"

Pushmin, P.^1 ; Romanov, G.^1

Institute of Mineral Resources Management and Processing, Irkutsk National Research Technical University, Lermontov str., 83, Irkutsk

664074, Russia^1

关键词: Borehole deviation;    Design features;    Efficiency increase;    Impact loadings;    Mechanical drilling speed;    Rock destruction;    Rotary drilling;    Rotation axis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/27/1/012052/pdf
DOI  :  10.1088/1755-1315/27/1/012052

来源: IOP

【 摘 要 】

The increase of efficiency of expendable well-drilling directly depends on the mechanism of rock destruction. The depth of hole coverage should be at the maximum possible value and equal along the whole contact area. The design features of performing rock- destruction tool in rotary drilling prevent the cutters, located on different distance from rotation axis, from working with equal intensity. The application of the shock pulses to a boring tool increases the mechanical drilling speed and sinking per revolution. One of the techniques for the efficiency increase is the application of impactor machines. On the other hand, the high values of mechanical drilling speed require the high values of impact energy which results in high power inputs energy consumption. The use of eccentric impact loading instead of central one can provide the enhancement of rock destruction efficiency, lower the power inputs, and decrease the risk of borehole deviation.