Name: 108mm - 508mm Drilling Rig Tools Concentric Bits For DTH Water Drilling Projects
Brand: Henan Rancheng Machinery Co., Ltd.
SKU: Concentric Bit
Availability: InStock

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

DTH Drilling Rig Tools

508mm Drilling Rig Tools

Water Drilling Concentric Bits

Place of Origin:

China

Brand Name:

RanCheng

Certification:

CE, ISO 9001:2000

Model Number:

Concentric Bit

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Product Details

Name:

Drilling Rig Tools

Model:

Concentric Bit

Outer Dia. Of Casing Tube:

108-508mm

Reamed Dia.:

118-538mm

Highlight:

DTH Drilling Rig Tools

508mm Drilling Rig Tools

Water Drilling Concentric Bits

Payment & Shipping Terms

Minimum Order Quantity

Price

Negotiable

Packaging Details

Standard shipping

Delivery Time

10-15 working days

Payment Terms

T/T, Western Union

Supply Ability

100sets per Month

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

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Product 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 Projects 0

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

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Water Drilling Concentric Bits

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