Supply pipe with a diameter of 146 _ reaming sleeve cheap Chiang Technology Co., Ltd. specializes in with tube / tube manufacturers produce processing a variety of types of hollow bolt grouting anchor pipe roof with duct quality, random sampling, affordable, whichever you call 186 ---- 0379 - 3535 == Third, with tube common specifications Tube OD (mm) Φ108, Φ127, Φ146, Φ168, Φ183, Φ219, Φ245, Φ273 with pipe, casing, casing eccentric reaming reaming sleeve follow DTH Drilling and technical points: 1, eccentric reaming DTH Casing Drilling follow up system can be divided casing sleeve rotation and two types of non-rotating sleeve, the sleeve rotation type casing up to the turret drive sleeve rotation, while applying pressure to promote the casing axis rig up; non-rotating sleeve type sleeve up through the casing Shoes inner shoulder impingement sleeve, while applying axial compression rig advance sleeve up. 2. Before drilling, spot welding methods must be two elastic cylindrical shank end face of the pin hole welding live, to prevent pin loosening, the guide drill bits and reaming drill bit fall into the bottom of the hole. When replacing guide the drill bit, give to the pin hole dross solder tail end face removed, and then remove the spring pin, long pin, ball can be replaced. 3, eccentric reaming drill is coupled with good impact, impact drill pipe coupled with the good, turret drive rotary drill pipe, with a positive rotating reaming drill bit eccentric manner projecting in the hole drilling center hole and reaming around the casing at the same time follow-up after reaching the desired depth, the drill pipe and drill bit counter-rotating eccentric reaming, reaming drill bit to make revenue center position, out from the casing. If the bottom of the hole is consolidated layer or hard rock needs to continue drilling, it must replace the conventional DTH other appropriate diameter drill head, back into the hole to continue drilling consolidation layer, or hard rock. 4, after the consolidation layer, or hard rock drilling completed within the drill hole impactor proposed, the use of hydraulic puller raised the sleeve from the hole. _ _ Casing with pipe with pipe manufacturers