Abstract:

The study provides a new approach to improve the penetration rate and reduce the collapse pressure by researching the impact between the drilling mud component and the compressive strength from the standpoint of choosing the excellent optimization of the drilling fluid system and components.The experiment choose the different concentrations of inorganic salt,the musingly of agent and polyethylene glycol ether to compound various drilling liquids,test the compressive strength of rock with the triaxial rock strength tester RTR-1000,inspect the effect of the drilling mud component and the compressive strength.The experiment shows that adding the inorganic salt to the drilling liquid can highly improve the compressive strength value.Adding the mssingle of agent that provides the softening particle to the drilling liquid can increase the residual strength of rock and the compressive strength.Adding polyethylene glycol ether to the drilling liquid that makes the same compressive strength of the original shape and the excellent stop up effect can not only verify the obvious existence of the sealing ability of cloud point,can also effectively improve the compressive strength.With the fact that the experiment and theory study,experimental consequences obtained the affecting factor and law of the compressive strength and a new approach to reduce the collapse pressure and improve the penetration rate.

Key words: triaxial test, compressive strength, treatment agent, borehole stability