
Overburden Casing System
Overburden Casing System
The overburden casing system, offered by Changsha Tianhe Drilling Tools and Machinery Co., Ltd., is a specialized technique used in various drilling operations such as water well drilling, anchoring, micro piling, and geothermal engineering. This system involves the installation of a casing or pipe through overlying layers of soil, rock, or other materials to provide support and stability during the drilling process.
Features:
- Provides support and stability during drilling
- Suitable for water well drilling, anchoring, micro piling, and geothermal engineering
- Ensures efficient and safe drilling operations
Benefits:
- Enhances drilling efficiency
- Reduces the risk of collapse during drilling
- Increases overall drilling success rate

1.When drilling starts,the reamer opens | 2.When the drilling is finished,reverse the rotation to close the reamer | 3.Keep the casing tube left in the hole,or pull out and pour in grout sealing material | 4.Use conventional drilling bits to continue the drilling |

Model | O.D of casing tube(mm) | I.D of Casing tube(mm) | Wall Thickness of the CasingTubemm | Max.O.D.of Guide Device(mm) | Match DTH hammer |
ODEX90 | 114 | 101 | 6.5 | 90 | COP34/DHD3.5 |
ODEX115 | 146 | 126 | 10 | 115 | COP44/DHD340/QLX40 |
ODEX140 | 168 | 148 | 10 | 136 | COP54/DHD350/QL50/SD5 |
ODEX165 | 194 | 174 | 10 | 160 | COP64/DHD360/QL60/SD6 |
ODEX190 | 219 | 199 | 10 | 185 | COP64/DHD360/QL60/SD |
ODEX240 | 273 | 253 | 10 | 240 | COP84/DHD380/QL80/SD8 |
ODEX280 | 325 | 300 | 12.5 | 280 | DHD112/DHD380/SD10 |
Other specifications are available upon request. | |||||



Product Description:
Changsha Tianhe Drilling Tools and Machinery Co., Ltd. offers the innovative Eccentric Casing System (ODEX) for various drilling applications:
- Water Well Drilling: ODEX is the primary drilling tool for water well projects, ensuring efficient drilling while preventing hole collapse, ultimately reducing drilling time.
- Anchoring: ODEX meets anchoring project requirements effectively, especially in slope reinforcement tasks.
- Micro Piling: Ideal for soil, clay, and sand rock formations, ODEX provides economical and rapid hole protection with permanent or temporary casing tubes.
Choose Changsha Tianhe's Eccentric Casing System for reliable and efficient drilling solutions.


Products | Instruction |
1--Casing tube | a.Thread casing tube.;left-hand b.Welded casing tube |
2--Drill PIpe | Thread:API(REG/IF)/NC |
3--Stablizer | Thread of stabilizer consistent with drill rod |
4--Hammer | Thread:API REG |
5--Casing shoe | a.Thread casing tube.;left-hand b.Welded casing tube |
6--Eccentric system | See the data sheet as below |


Concentric Casing System with Ring Bits
Changsha Tianhe Drilling Tools and Machinery Co., Ltd. offers a concentric casing system with ring bits that is ideal for challenging geological conditions like pebble, fissure, dry stone, boulder, and construction backfield waste. This system allows drilling at any angle with exceptional straightness, reaching a maximum hole diameter of 1550 mm.

Concentric Casing System with Blocks
Changsha Tianhe Drilling Tools and Machinery Co., Ltd. offers a high-quality concentric casing system with blocks designed for various applications in the construction industry.
- The joint tools are made from superior materials and undergo heat treatment for a reliable connection.
- The casing shoe is heat-treated to ensure an extended service life.
- The blocks and locking kit are reinforced, providing excellent overall performance.
Perfect for pile foundation engineering and slope support engineering projects, this system guarantees durability and efficiency in challenging environments.

Concentric Casing System with Wings
Concentric Casing System with Wings
Our company, Changsha Tianhe Drilling Tools and Machinery Co., Ltd., offers a concentric casing system with wings that is ideal for covering layers with loose materials like soil, clay, weathered rock, and sand particles.
Key Features:
- Suitable for layers with loose materials
- Concentric casing system design
- Incorporated wings for enhanced stability
About Our Company:
Established in 2002, Changsha Tianhe Drilling Tools and Machinery Co., Ltd. operates from a 60000 square meters workshop in Hunan province, China. We specialize in manufacturing DTH Hammers and Bits, ODEX systems, and Reverse Circulation Hammers and Bits. With a global service network spanning over 40 countries, we are committed to delivering high-quality drilling tools.










Changsha Tianhe offers High Penetration Rate Concentric Casing System. Delivery in 15-18 days post deposit. Packed in wooden cases.
Product Description
Welcome to Changsha Tianhe Drilling Tools and Machinery Co., Ltd.
Our company is a factory specializing in manufacturing high-quality drilling tools and machinery. We offer a wide range of products to meet your drilling needs.
Product Features:
- Fast delivery: 5-10 days for in-stock items, 15-20 days for out-of-stock items
- Free samples available, only pay for freight
- Flexible payment terms: 100% in advance for orders under $1000, 30% T/T in advance for orders over $1000
Benefits of Choosing Us:
- High-quality products manufactured in our factory
- Quick delivery times to meet your project deadlines
- Free samples to ensure product satisfaction
- Flexible payment options for your convenience
If you have any further questions or would like to place an order, please feel free to contact us. We are here to assist you with all your drilling tool and machinery needs.