The Analysis of Use Condition of Foam Drilling Fluid

With the development of drilling technology,the effect to the use of foam drilling fluid to improve the drilling rate is more obvious.Therefore,it becomes more and more important in the drilling engineering.But how to determine what kind of deep well under the conditions of the use of foam drilling fluid is the emphasis and difficulty of drilling engineering.This paper aims at exterminating the largest depth and pressure during the implementation of foam drilling.The largest depth and pressure can be measured by changing the drilling pressure and drilling hole depth.Experimental results represent that during the foam drilling,the largest depth is 4500m, extreme pressure is 20MPa.