A possibility of the efficient use of rotary percussive drilling to provide drilling smaller diameter holes (40-70 mm) both in mining and prospecting is disclosed herein. A new construction designed for the nipple thread connection is described. The relative amplitude variation, change of power pulse time and energy in their propagation throughout the drilling tool are determined. A possibility of the efficient power pulse transfer along the drill string to the rock destruction tools with new nipple connections which allow automating the make-up and breakout system of drill pipe was supported by experiments.
|Страницы (с... по...)||245-249|
|Журнал||International Journal of Mining Science and Technology|
|Статус публикации||Опубликовано - 1 янв 2014|
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Energy Engineering and Power Technology
- Geochemistry and Petrology