为了评价位于哈萨克斯坦地区的里海沿岸凹地含盐地层的油气远景,于1961年末开始站进1号超深井。目前已钻进3750米。设计井深为7000米。钻进分两个阶段进行:第一阶段,用起重量为200吨的“3-59”型钻探装置钻进到5000米;第二阶段用起重量为300吨的“－300”型的特制装置和超强度的工具钻进到7000米。 In order to evaluate the prospect of oil and gas in the salt-bearing formations of the Caspian Sea in the Kazakhstan region, it began to station into No. 1 ultra-deep well at the end of 1961. Has now drilled 3750 meters. Design depth of 7000 meters. Drilling is carried out in two stages: In the first stage, a “3-59” type drilling rig with a lifting capacity of 200 tons was used to drill to 5000 meters. In the second stage, a “-300” model with a capacity of 300 tons Installation and super tools to drill to 7000 meters.