The Evaluation Of Efficiency Of Rock Breaking Of N₁j In Keshen Block

N₁j group of Kuche piedmont has poor drillability,slow ROP,single bit footage short,resulting in long Kuqa piedmont drilling cycle,rock breaking efficiency of Rock drilling site has important theoretical significance and the value of the works.Taking Keshen piedmont blocks N₁ j group for the study,combined with rock features of N₁ j,which has a gravel layers sandwich slow drilling rate and low efficiency of rock breaking.First,the layers of rock drill ability conduct research on regional structural and stratigraphic studies of the selected block,evaluate the drill ability of the block formation under dynamic loading conditions and how they affect the rock-breaking efficiency.Besides the establishment of the existing drilling rate equation,most consider WOB formation characteristics,speed,water,power and other static conditions,the establishment of ROP equation is under static conditions.According to the site measurement data,the role of this article in the form of statistical analysis of downhole vibration and its effect during the drilling process.According to analyze field test data,focuses on the impact of the bottom hole assembly vibration on the rock breaking efficiency under dynamic loading conditions,mainly focus on drilling vibration acceleration and vibration frequency.In the drilling process by controlling the drilling parameters change,so that the bottom of the vibration at a stable vibration.Keshen block three open ground speed control in 90-140 r / min,lateral acceleration 1-4g,longitudinal acceleration 1-2g.Underground holding steady vibration,stick-slip vibration to avoid the generation of stick-slip vibration and reduce as much as possible,so that the relative increase of ROP,improve the efficiency of rock breaking.