194mm Ql60 Overburden Wing Bit For Concentric Casing System Rock Drilling Eccentric Casing System

Brand Name:MIROC
Certification:ISO
Model Number:QL60
Minimum Order Quantity:1
Delivery Time:15-20days
Payment Terms:L/C, D/A, D/P, T/T, Western Union, MoneyGram
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Location: Beijing Beijing China
Address: Room9-616, No. 10 Zhenxing Road (MDW Plaza), Changping District, 102200 Beijing, China
Supplier`s last login times: within 1 hours
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It is suitable for drilling water wells , geothermal wells , short miscopies ,medium mini-type grouting hole of
building , dam and harbor project .


1. Ring bit and casing shoe assembly is welded to casing prior to drilling. Lock the assembly
into pilot bit with hammer. The pilot bit's upper shoulder engages the shoulder of the casing shoe.

2. Hammer's percussive energy is transferred through the pilot and ring bits, crushing rock . Part of impact energy advances casing.

3. On completion of drilling and casing , the drill string with pilot bit is retrieved by a slight reverse rotation to unlock the bayonet coupling .The ring bit stays in the hole , and can be recovered only if the casing is retrieved

4.If further drilling is required on the bedrock,the pilot bit is simply repiaced by an appropriate size of standard DTH bit.


Model(mm) Casing OD(mm)Maximum OD of Center Bit(mm) Casing Shoe IDMaximum OD of Reaming(inch) Hammer Type
146slide Block Casingφ146φ123φ115φ1564
168slide Block Casingφ168φ146φ140φ1855
178slide Block Casingφ178φ156φ150φ1935
183slide Block Casingφ183φ160φ154φ1935
194slide Block Casingφ194φ178φ166φ2116
219slide Block Casingφ219φ203φ193φ2376~7
245slide Block Casingφ245φ220φ210φ2606~8
273slide Block Casingφ273φ251φ241φ3088
325slide Block Casingφ325φ298φ281φ3788~10
377slide Block Casingφ377φ350φ335φ43010~12
406slide Block Casingφ406φ380φ363φ42612
560slide Block Casingφ560φ530φ511φ59018
610Slide Block Casingφ610φ582φ556φ64018


China 194mm Ql60 Overburden Wing Bit For Concentric Casing System Rock Drilling Eccentric Casing System supplier

194mm Ql60 Overburden Wing Bit For Concentric Casing System Rock Drilling Eccentric Casing System

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