本文介绍地下油管放射性示踪检漏方法及

ϕ

110mm球形检漏仪。这种检漏方法具有简便、经济、灵敏度高等特点，能探测到漏油率为每小时两升的漏洞。目前，

ϕ

110mm球形检漏仪适用于直径为六英寸、长度为五公里以内的地下输油管道的检漏。已经在四个现场准确地找到六个漏洞部位。

We have developed a method of locating leaks in buried oil pipelines

which is based on the use of radioactive tracers. A spherical detection instrument with the outer diameter of 110mm has been designed. The method is simple

economical and sensitive. It is possible for the instrument to find out a leak with the leak-rate not less than 2 litres per hour. At present the instrument is suitable for the buried oil pipelines with a diameter of≥6 inches and a length of≤5 kilometres. So far there are six leaks have been accurately located in four different field tests.