我队在某矿区施工CK409号孔时,在灰岩、砂岩及磁铁矿中遇到很厚的石膏夹层.钻进中,从井内返上的泥浆,粘度及失水量迅速增大,泵送困难,泥皮也变得厚而疏松,井内事故不断出现,在中南矿冶学院探矿专业师生的大力帮助下,我们参阅了胜利油田关于钻井泥浆的有关资料,用南京野生植物试验厂生产的花香果栲胶,试制了花香果盐 During the construction of hole No. CK409 in a certain mining area, our team encountered a very thick gypsum interlayer in limestone, sandstone and magnetite. During drilling, the mud, viscosity and water loss returning from the well rapidly increased and the pumping difficulty , The mud skin also became thick and loose, and accidents in the well continued to occur. With the help of the prospective teachers and students of Zhongnan Mining and Metallurgical Institute, we have read the information about drilling mud in Shengli Oilfield, the flowers produced by the Nanjing Wild Plant Experiment Plant Jujube plastic, trial of floral salt