Product Name: SOD114 Odex Eccentric Retrievable Symmetric Double Casing System for Drilling/Waterwells/Geothermal/Building Model NO.: 89mm Material: Alloy Steel Brand: Prodrill Air Pressure: 20 Bar Color: Gold, Red Hammer Type: 3inch, 4inch Outer Dia. of Casing Tube: 114 ~ 168mm Inner Dia. of Casing Tube: 101 ~ 148mm Wall Thichness of Casing Tube: 6.5 ~ 10.5mm Processing Type: Forging Trademark: PRODRILL Transport Package: Wood Package Specification: CE, SGS Origin: China HS Code: 82071990 Product Description 89 Mmtop Hammer Symmetric Casing SystemConcentric Casing System Ring Bit is the latest new and simple product line designed and manufactured by OCMA DrillTech for drilling through overburden with casing.It can be used in all ground conditions and drilling applications as: Foundation construction, Piling construction, Water Well and Geothermal, Tunneling and Horizontal drilling.Advantage:- Straight Holes and Fast Penetration Rate.- Less Torque in all ground conditions.- Easy System to lock and Unlock Ring.- Drilling at any angle required.- More Holes and Low investment.*** Concentric (or Symmetrix) Overburden Casing System with BlocksModel: 1) Casing Shoe + pilot bit + 2 pcs Blocks; Or2) Casing Shoe + pilot bit + 3 pcs Blocks; Or3) Casing Shoe + pilot bit + 4 pcs Blocks.Concentric (or Symmetric or Symmetrix) Overburden Casing System With WingsSymmetric or Symmetrix Overburden Casing Drilling System With WingsSymmetrix Overburden Casing Drilling System With Two WingsConcentric Overburden Casing SystemAdvantages - Outstanding:1. The stable and reliable working performance and the less vibration of drill rig.2. Flexible to open and close.Design Principles:Make the casing follow easy and the equipment and operation simpleThe stable and reliable working performance and the less virbration of drill rig.Operation Procedure:1. When the drilling starts, the blocks slides down through the grooves on pilot bit, and reams to drive the casing shoes and tubes into the hole.2. When finished the drilling in overburden rock formations, raise the drilling tools and the blocks will get closed through the grooves, and the drilling tools can be pulled out from the hole.3. Next construction can be followed.1) Wings (2pcs) + Locking System + Guide Device = Assembly2) Or order separately.3) If you need o. Dia. 178mm or above, we suggest to use our SLIDE BLOCKS model.Application Range and Examples:It is recommended to drill in rock formation where contains some ovals and fractures.WarrantyThe company is responsible for any problem caused by defaulty of material and maching.The broken parts will be replaced at the sight of photos and product serial code.Other Structures:Concentric (or Symmetric or Symmetrix) Overburden Casing System: With ring bits, with wings and with slide blocks.Welcome your inquiry or question, any need, please contact me.Best regardsProductName:Concentriccasingsystemwithringbit&Concentriccasingsystem(Permanent)Material:carbideMOQ:5pcsDesignPrinciplesMakethecasingfolloweasyandtheequipmentandoperationsimpleTypeConcentriccasingsystemApplicationItisrecommendedtodrillinrockformationwherecontainssomeovalsandfractures.CertificateISO9001 SONCAPOutstandingAdvantagesThestableandreliableworkingperformanceandthelessvibrationofdrillrigandflexibletoopenandclose.