应用压力平衡原理钻进厚坡积层的尝试

A Trial Boring into a Thick Sliderock by Using Pressure Equilibrium Principle

本文以探究钻孔坍塌的起因——力的不平衡为主导思想,试用PHP泥浆孔口补液的方法,收到了护壁堵漏的效果,维护了井壁的稳定.

It is considered that the cause of hole caving is due to the nonequilibrium of forces. Guilding by this idea, a liquid infusion method was adopted by supplying the PHP mud from thee hole top. Test results indicate that this method is very effective for hole wall protecting and thief zone plugging and keeps the mud cake stable on hole wall.