摘要
结合牙轮钻头的结构、性能、工作条件，分析了大口径组合牙轮钻头在使用中出现的问题。
Based on the practical cases undertaken by author,some problems in application of large diameter combined cone bits are discussed Suggestions on improvement of the bits are proposed in this paper
出处
《地质科技情报》
CAS
CSCD
北大核心
1999年第S1期22-23,共2页
Geological Science and Technology Information
关键词
大口径组合牙轮钻头
凿岩
建议
large diameter combined cone bit,drilling in rock,suggestion
