某孔设计深度350米,倾角83度。钻进到244.11米时,井内突然涌水,每分钟涌水量为120公升,破坏了泥浆质量,而且钻孔75至82米、220米处发生两层坍塌,井内流砂及坍塌物颗粒,大的如鸡蛋,小的如黄豆、小米,两层积达百米之多,捞出井外的竟有十余吨,为我队建队以来施工千余个钻孔中最复杂 A hole design depth of 350 meters, tilt 83 degrees. Drilling to 244.11 meters, the sudden water in the wells, water inflow of 120 liters per minute, undermining the quality of the mud, and drilling 75 to 82 meters, 220 meters at the collapse occurred in two layers, well sand and slump particles, such as large Eggs, small, such as soybeans, millet, two layers of up to as many as 100 meters out of the well as much as more than ten tons of construction team since I build more than a thousand holes in the most complex