Name: 140mm DHD340 Concentric Casing Drilling System for Rock Drilling Mining Geotechnical Engineering
Brand: KSQ Technologies (Beijing) Co. Ltd
SKU: DHD340
Price: 1098 USD
Availability: InStock

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140mm DHD340 Concentric Casing Drilling System for Rock Drilling Mining Geotechnical Engineering

Product Details:

Place of Origin:	CHINA
Brand Name:	MIROC
Certification:	ISO
Model Number:	DHD340

Payment & Shipping Terms:

Minimum Order Quantity:	1
Price:	＄1098
Delivery Time:	7-14
Supply Ability:	3000

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Detailed Product Description

Product Name:	Concentric Casing System	Model:	DHD340
Diameter:	140mm	Compatible Hammer:	DHD340 QL40
Application:	Overburden Drilling Mining Construction Geotechnical Engineering	Material:	High Strength Alloy Steel
Feature:	High Wear Resistance And Stable Drilling
Highlight:	140mm DHD340 concentric casing drilling system , DHD340 rock drilling tools for mining , concentric casing system for geotechnical engineering

DHD340 140mm Concentric Casing System

The DHD340 140mm Concentric Casing System is purpose-built for overburden drilling in mining, construction, water well drilling, foundation engineering, and geotechnical projects. It integrates casing advancement and drilling into a single efficient operation, allowing the casing pipe to follow the drill bit into the ground as drilling progresses.

This concentric drilling technology is especially suited to loose soil, gravel, cobblestones, weathered rock, fractured formations, and other unstable ground conditions where conventional drilling methods risk hole collapse or borehole instability.

Concentric Casing System Specifications

Model	Casing Tube O.D (mm)	Bit Diameter (Button Included) (mm)	Casing Shoe I.D (mm)	Maximum Reaming O.D (mm)	Hammer Style
146mm Concentric Casing	146	123.5	116	156	4"
168mm Concentric Casing	168	146	140	184	5"
178mm Concentric Casing	178	157	150	194	5"
183mm Concentric Casing	183	160	152	198	5"
194mm Concentric Casing	194	178	164	208	6"
219mm Concentric Casing	219	203	192	234	6"-7"
245mm Concentric Casing	245	217	205	260	6"-8"
273mm Concentric Casing	273	246	233	291	8"
325mm Concentric Casing	325	297	282	340	8"-10"
377mm Concentric Casing	377	351	332	405	10"-12"

Note: The dimensions listed above are standard factory specifications. Special designs are available according to customers' casing wall thickness requirements.

Key Features and Advantages

1. Simultaneous Drilling and Casing Installation
The concentric casing system allows drilling and casing advancement to proceed simultaneously, helping maintain borehole stability and reducing the risk of hole collapse in loose and unstable formations.
2. Excellent Hole Stability
The casing protects the borehole wall during drilling, making it suitable for challenging geological conditions such as loose overburden, gravel, fractured rock, and mixed formations.
3. Efficient Drilling Performance
The optimized concentric structure supports smooth drilling operations, stable casing advancement, and efficient penetration through difficult ground conditions.
4. Durable Construction
Manufactured with carefully selected steel materials and precision machining processes, the system is designed to withstand demanding drilling environments, impact loads, and abrasive ground conditions.
5. Reliable Compatibility
Designed for DHD340 drilling applications, the system can be configured according to casing dimensions, drilling requirements, and project conditions.