THE ANALYSIS OF ROCK STRESS AND DISPLACEMENT OF THE SURROUNDING WALL OF INCLINED WELLBORE

Because of the well size shrink caused by rock creeping,the drillstem,casing and log instrument can’t be run into the bottom of the hole freely.The analysis of the rock stress and displacement of the surrounding wall of the inclined wellbore is prasented.The relation formula of the radial displacement,inclination,azimuth,stabilizing cycle and fluid density is derived with the theory of rheology.The formula between the fluid density and stabilizing cycle is given out under the given condition.The conclutions have guiding significance for the well desing and drilling operation.