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由于我队浅孔所遇岩石绝大部分是6～7级泥质灰岩，深孔大部分是8级矽质灰岩、磷块岩及9～10级燧石灰岩，因而如何更好地解决钻粒钻进问题是提高我队钻探效率的关键。以前我队使用的钻粒钻头只限于弧形水口一种，现在我们在全国蓬勃开展技术革新运动的鼓舞下，以敢想、敢说、敢作，大胆创举和试验的精神。大胆试验了几种不同水口的钻粒钻头，并取得了一定效果，现将试验情况及其优缺点介绍如下：
Since most of the rocks encountered by the shallow holes in our team are Grade 6 to Grade 6 argillaceous limestone, most of the deep holes are grade 8 siliceous limestone, phosphorous block and grade 9 to 10 feldspathic limestone, so how to better solve this problem Drilling grain drilling problem is to improve the drilling efficiency of our team the key. In the past, the drilling bits used by our team were limited to arc-shaped nozzles. Now, inspired by the vigorous technological innovation movement in China, we dare to think, dare to say, dare to be bold, pioneer and test the spirit. Dare to test several different nozzle drill bits, and achieved some results, the test situation and its advantages and disadvantages are described below: