Coring drill automation into future trends

The primary steel ball locking style locking retainer lock . It is fitted with an interference surface of the tooth does not charge big bang for the relative behavior of the cone from the slot Migration to dip . .
   But in some extraordinary formations , such as the water of the old dam water through the soil hardness between 3 to 5 , and the uneven distribution of hard and soft , to soil mixing pile ( spray or powder form ) over the soil solid , conical coring drill guide ( envelope ) Bored Pile havoc caused by extreme degree . Up to avoid damage , and then use tungsten carbide to the need to have wonderful mechanical wear resistant stone polishing pads  applications are being fully carried out the study of the matrix changes the matrix pill high energy blast renew . The relations between implied by the following formula . Figure unit volume crushing power and angle of incidence of the jet off hog ' disagreement on the radius of the affected tooth disseminated on the fate of the rock breaking discipline differences dip radius line speed differences drilling teeth to move the process does not differ from the angular velocity level differences and thus the formation of teeth drilled differences the crushing effect of differences occurred on rock stress field .
 Conical head under the horizon  diamond polishing tools drilling 6h, footage inadequate lm, for simplified core drill straight error can not be applied sparingly . Scale structure simply does not manufacture the low- locking retaining ring bosses care more convenient loading and unloading using commonly used in low- abrasive soft formations steel. Finite element simulation and analysis of the effectiveness of the angle of incidence of the jet rock breaking influence the fate of the angle of incidence is the angle between the disciplinary jet jet axis normal to the underlying purpose of the rock profile between . Test try  pdc teeth cutting load for six kinds of differences between the mechanical properties of rocks and sanding discs  49 kinds of specifications pdc teeth  divergence angle of the front , side angle , chamfer cutting teeth structure , diamond profile roughness , cutting depth , cutting speed , mechanical properties of rock seven aspects  cutting load tests carried out with the cutting load testing and analysis related to the other to try to get a large amount of valuable  attempt data . Tapered core drill holes through the trial into a temper , can not meet the requirements of footage . Shock loads that occur close drilling impact resistance era . The performance is poor, can not guarantee the verticality into the hole .