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108mm - 508mm Drilling Rig Tools Concentric Bits For DTH Water Drilling Projects
108mm - 508mm Drilling Rig Tools Concentric Bits For DTH Water Drilling Projects
Specifications
Brand Name :
RanCheng
Model Number :
Concentric Bit
Certification :
CE, ISO 9001:2000
Place of Origin :
China
MOQ :
1
Price :
Negotiable
Payment Terms :
T/T, Western Union
Supply Ability :
100sets per Month
Delivery Time :
10-15 working days
Packaging Details :
Standard shipping
Name :
Drilling Rig Tools
Model :
Concentric Bit
Outer Dia. of Casing Tube :
108-508mm
Reamed Dia. :
118-538mm
Description

Concentric Bit for DTH Water Drilling Projects Drilling Rig Tools

Product Description

The concentric / symmetrical drilling system is an efficient integrated drilling and casing technology, especially suitable for environments with unstable formations. This system uses a removable or reusable ring drill bit to speed up the drilling process and maintain the straightness of the borehole. Its internal flush tank and casing shoe design provide excellent sealing while reducing formation disturbance.

This system is widely used in the construction of water wells, geothermal wells, building foundations, dams and ports, etc. It is mainly used for drilling short holes and small and medium - sized grouting holes.

Technical Parameters

Outer Dia. of
Casing Tube		 Inner Dia. of
Casing Tube		 Reamed Dia. Min. Inner Dia. of
Casing Shoe		 Drill Pipes Max. Outer Dia. of
Normal Bit
mm mm mm mm mm mm
108 93-99 118 86 76 77
114 101-103 127 91 76 82
127 114-116 136 101 76 92
140 124-127 152 117 76 105
146 127-132 154 117 76 105
168 149-155 184 140 76,89 125
178 159-165 194 150 76,89 140
193 173-180 206 164 89,114 150
219 199-206 234 184 89,114 165
244 224-231 260 210 114 190
273 251-257 305 240 114,127 220
323 301-310 348 284 127 255
406 382-388 440 364 140 340
457 433-439 488 413 140 385
508 484-490 538 464 140 440

Operation Process

1 . Weld the trephine bit and casing shoe to the casing and lock it firmly on the pilot bit by tapping.

2 . The impact energy is transmitted through the pilot bit and the trephine bit, effectively breaking the rock and advancing the casing.

3 . After drilling and casing operations are completed, remove the drill string with the pilot bit by gentle counter-rotation and unlock the latch connection. The trephine bit remains in the hole and is only removed when retrieving the casing.

4 . Finally, continue drilling into the bedrock to the predetermined depth using traditional drilling techniques.

The advantages of this drilling system are its integrated design and efficient operating procedures, making it ideal for drilling in unstable formation conditions.

Machine Pictures

108mm - 508mm Drilling Rig Tools Concentric Bits For DTH Water Drilling Projects108mm - 508mm Drilling Rig Tools Concentric Bits For DTH Water Drilling Projects108mm - 508mm Drilling Rig Tools Concentric Bits For DTH Water Drilling Projects108mm - 508mm Drilling Rig Tools Concentric Bits For DTH Water Drilling Projects108mm - 508mm Drilling Rig Tools Concentric Bits For DTH Water Drilling Projects

Product tags

water well drilling tools

,

pcd drilling tools

,

drill size for taps
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108mm - 508mm Drilling Rig Tools Concentric Bits For DTH Water Drilling Projects

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Product Detail
Brand Name :
RanCheng
Model Number :
Concentric Bit
Certification :
CE, ISO 9001:2000
Place of Origin :
China
MOQ :
1
Price :
Negotiable
Contact Supplier
108mm - 508mm Drilling Rig Tools Concentric Bits For DTH Water Drilling Projects

Henan Rancheng Machinery Co., Ltd.

Verified Supplier
2 Years
henan, zhengzhou
Since 2010
Business Type :
Manufacturer, Exporter, Seller
Main Products :
Water Well Drilling Machine, Water Well Drilling Rig, Portable Water Well Drilling Machine
Total Annual :
20 Million-30 Million
Employee Number :
100~200
Certification Level :
Verified Supplier
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