摘要
Based on the analysis of difficulties encountered in drilling large diameter base rock hole and comparison of various coring methods.The author put forward solution and designed the rudimental configuration of new type bit.
Based on the analysis of difficulties encountered in drilling large diameter base rock hole and comparison of various coring methods.The author put forward solution and designed the rudimental configuration of new type bit.
出处
《西部探矿工程》
CAS
2000年第1期95-95,共1页
West-China Exploration Engineering
