Once the correct starter drill pipe, hammer and bit are in place, it’s a matter of simply adjusting the airflow to set the frequency and you are ready to drill. Products for any type of directional drilling conditions. The cprda was tested on two wells drilled in hard rock formation. The results of dynamics modeling and stress computation showed that the cprda induces more shear stresses in rock formations compared to axial percussion drilling and axial percussion-rotary drilling.
), alteration, and joint dip, are included in the model along with two operational parameters of the rotary drill, bit rotational speed and thrust. This research was supported by the key program of national natural science foundation of china (contract no. With our teamalloy drill string, customers truly understand value.