73型找水仪是在69型找水仪的基础上经改进研制成功的。它是测量油井分层产液量和分层含水量的一次仪表，是了解油井地下动态的一种主要下井仪器。该仪器自1974年全面投产以来，已测试找水18920井次。1978年以后，基本实现了每口油井年测试找水一次的目标（非自喷井和有分层配产管柱的井除外）。随着油田进入中、高含水期， 73-type water meter is based on the 69-type water meter developed by the successful development. It is a measure of stratified production of oil wells and stratified water content of the instrument, is to understand the underground dynamic well of a major downhole instrument. The instrument has been put into operation for 18920 wells since it was fully operational in 1974. After 1978, the goal of finding water once per well was basically achieved (except for non-self-spraying wells and wells with stratification and distribution pipelines). With the oilfield entering the high water cut period,