摘要
介绍了一种采用扶正器使探管居中、锥面准直发射伽马射线和锥面准直接收散射伽马射线的小直径双源距新型密度测井仪。
Thepaper introduced a new type of small diame-ter and double source-detector separation den-sity logging tool.This tool is placed in mid-dle of broehole by the centralizer and emitsthe gamma rays and recives the scattered gam-ma rays directionally by the cone collimatedimplement.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
1990年第6期54-60,共7页
Coal Geology & Exploration
