天津市为了合理开采地下热水资源，在有限的地面施工受控定向井，使地下采水井段与邻近的TR-3号井采水井段距离加大到1000m，决定施工一口TR-6号定向井，又称对井（姊妹井）。天津市第一勘探大队承担了这项任务，于4月22日顺利钻成了这口定向深井，井深达到2120m，这在我国地热钻探史上还是第一次。 In order to reasonably exploit underground hot water resources, Tianjin constructed controlled directional wells on limited ground so that the distance between the underground aquifer section and the adjacent well TR-3 was increased to 1000m, and decided to construct TR-6 To the well, also known as the well (sister wells). Tianjin First Exploration Brigade undertook this task, successfully drilled this directionally oriented deep well on April 22, well depth reached 2120m, which is the first time in geothermal drilling history of our country.