Concentric Overburden Drilling System with Rings

Product DescriptionA.Drill in overburden unstable rockB.One step to drill and follow casingC.Flexible to open or close  1. When drilling starts, the pilot bit drives the casing shoe and casing tube.   2. When reaching the bedrock, reverse rotation of the tools and pull the pilot bit out from the hole.   3. Pour in concrete or move to the next construction procedure.   4. Use conventional tools to drill to the desired depth. Concentric Overburden Drilling System With RingsOverburden drilling systems are widely used in a variety of applications from well drilling and minipilling to rock anchoring and site investigation. This is easily removed to allow for bit are sharpening or replacement. It is the most economical solutions because its ingenious reaming wing the bit is retrievable can be used at the next hole.>>The casing shoe is welded to the casing.  >>The pilot bit and ring bit are locked together by the bayonet coupling. They drill a hole large enough to allow the casing to be pulled into the hole.  >>The pilot bit and ring bit rotate with the drill string while the casing shoe and casing do not rotate.  >>When required depth is reached, the pilot bit is unlocked by a slight reverse rotation of the drill string.  >>The drill string and pilot bit will be retrieved through the casing, the ring bits and casing shoe will be left in the hole for permanent casing system.   Product Parameters Model Outer Dia. of Casing Tube(mm) Inner Dia. of Casing Tube(mm) Wall thickness of casing(mm) Guide device Max. Outer Dia(mm) Reamed Dia(mm) Max. Outer Dia. of Normal Bit GL360-219 219 119 10 197 234 185 GL380-245 245 225 10 222 260 210 GL380-273 273 253 10 251 305 240 GL380-325 325 305 10 302 350 282 GL112-355 355 325 10 322 380 305 GL112-406 406 382 12 380 432 365   Detailed PhotosFeature  1. Deal with straight, oblique hole and other angle holes2. Hardening treatment of the part's surface:with longer operating life and excellent anti-wear properties3. High grade tungsten carbide inserts Related product-Middle-low/high air pressure DTH hammers & bits-Big hole high air pressure DTH hammer using in water well, oil, gas and construction drilling.-Eccentric overburden drilling system-Hole opener bit-Shank adapter, coupling sleeves and all kinds of adapters Company Profile Glorytek Industry (Beijing)Co.,Ltd.,Located in Beijing,China, is an integrated corporation specialized in manufacturing and exporting top quality drilling equipment and drilling parts for decades. We are supported and assisted by a highly experienced team of designers and engineers that enable us to complete all the assigned projects successfully as per the specified requirement from our clients.   Our products are widely used in the scope of mining, water well drilling and exploration, anchor grouting project, side slope protection engineering, oil and gas engineering,underwater rock drilling & blasting operations of seaport channel, hydropower project, national defense projects ect./* January 22, 2024 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1