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Home > Rock Drilling Equipment Systems > Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System
Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System
Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System
Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System
Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System
Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System
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Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System
Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System
Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System
Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System
Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System

Drilling System Rock Drilling Tools Eccentric Reamer Drilling System Eccentric Casing Drilling Odex 165 Overburden Casing System

Customization: Available
Warranty: 1year
Type: Drill Tools
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Product Description

Technical Specifications
Model NO.:114, 168, 219, 323, 254
Application:Water Well Drilling
Certification:CE, ISO9001: 2000, API
Condition:New
Diameter:76-1000mm
Material:Tungsten Carbide, High Manganese Steel
Processing:Forging
Use:Well Drilling, Coal Mining, Quarry Drilling
Color:On Request
Advantage:High Performance
HS Code:82071990
Capacity:2000 Sets / Week
Product Description

Overburden Casing System (Eccentric Casing System) is ideal for drilling water wells, geothermal wells, short micropiles, and medium mini-type grouting holes for buildings and diamond harbor projects.

Economy: The eccentric system is the most cost-effective solution due to its ingenious reaming wing. The bit is retrievable and can be reused for subsequent holes.

Working Principle
▶During drilling, the reamer bit rotates out to enlarge the hole, allowing the casing tube to slide down behind it.
▶Upon reaching the required depth, the drill pipe rotates in the reverse direction, causing the reamer bit to retract.
▶This enables the entire drilling system to pass through the casing while it remains in place.
Competitive Advantage
✓ High-grade tungsten carbide inserts for superior durability.
✓ Bit bodies manufactured from high-grade steel.
✓ Processed using state-of-the-art CNC machinery and advanced heat treatment.
Overburden Casing System
Specification Details
Part PA90 PA115 PA140 PA165 PA190
Casing Tube (max.O.D.) 115mm 142mm 171mm 195mm 222mm
Casing Tube (min.O.D.) 102mm 128mm 155.6mm 182.6mm 205mm
Guide Sleeve Length 174mm 174mm 205mm 225mm 250mm
Drill Pipe Conn. API 2 3/8" Reg API 2 3/8" Reg API 2 3/8" Reg API 3 1/2" Reg API 3 1/2" Reg
DTH Hammer DHD35, COP2 DHD340, COP44 DHD55, COP54 DHD360, COP64 DHD360, COP64
Reaming Diameter 123mm 152mm 185mm 211mm 237mm
Product Variations & Design
Different Shanks
Different Face Shapes
Button Shapes
A: Start drilling, reaming sleeve opens, borehole range increases for casing tube.
B: Finish overburden layer, reverse circulation, reaming sleeve retracts for lifting.
C: Casing left in borehole prevents collapse during pipe removal and grouting.
D: Regular drilling bits continue to the required rock stratum depth.
Diagram A
Diagram B
Frequently Asked Questions
Q1: Can I request a sample for quality testing?
A: Yes, samples are available. While they are paid, we can offer a discounted price for testing purposes.
Q2: What quality control procedures are in place?
A: We implement a 100% strict inspection and testing protocol for every order prior to packing to ensure high performance.
Q3: How is after-sales service handled?
A: We provide free replacements if any issues are caused by confirmed product quality defects.
Q4: What is the primary use of the Overburden Casing System?
A: It is specifically designed for drilling in complex conditions such as water wells, geothermal projects, and foundation grouting where soil stability is a concern.
Q5: What materials are the drill bits made from?
A: Our products use high-grade tungsten carbide inserts and premium forged steel for maximum durability and wear resistance.
Q6: Are there different face designs available?
A: Yes, we offer Flat, Convex, and Concave face designs, as well as Spherical, Ballistic, and Parabolic insert shapes to suit various rock types.

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