Products Description

As an essential part of safe drilling operations, it features high rigidity, good sealing performance, and easy installation, playing a crucial role in ensuring drilling safety and hole forming quality in complex overburden strata.

Specification

ODEX systems for DTH hammers that are specially designed to drill and case simultaneously through overburden. These durable overburden drilling tools easily pass through large boulders for pulling lightweight wherein inexpensive casings are incorporated behind them. These overburden drilling tools are easy to remove from the hole/ depth and are provided to our clients in the following technical specifications:

Size: ODEX90, ODEX115, ODEX127, ODEX140, ODEX152, ODEX165, ODEX190

	Hammer	Pilot Diameter	Reamed Diameter	Casing Tube Outside Diameter	Casing Tube Wall Thickness	Casing tube wall thickness/ o casing shoe
ODEX 90	3″	90 (3-9/16)	123(4-13/16)	114.3 (4-1/2)	6.3 (1/4)	10 (3/8)
ODEX 115	3″-4″	115 (4-1/2)	152 (6)	139.7 (5-1/2)	6.3 (1/4)	10 (3/8)
ODEX 127	4″	127 (5)	165 (6-1/2)	152.4 (6)	6.3 (1/4)	10 (3/8)
ODEX 140	4″-5″	140 (5-1/2)	181 (7-1/8)	168.3 (6-5/8)	6.3 (1/4)	12.7 (1/2)
ODEX 152	5″-6″	152 (6)	192 (7-9/16)	177.8 (7)	6.3 (1/4)	10 (3/8)
ODEX 165	5″-6″	165 (6-1/2)	209 (8-7/32)	193.7 (7-5/8)	6.3 (1/4)	12.7 (1/2)
ODEX 190	6″-8″	190 (7-1/2)	235 (9-1/4)	219.1 (8-5/8)	6.3 (1/4)	12.7 (1/2)

Product Features & Advantages

Strong load-bearing capacity: High-quality steel material and reasonable structural design ensure excellent rigidity, effectively supporting borehole walls and preventing collapse in loose strata.
Reliable sealing performance: Precision connection and sealing structure prevent groundwater, mud, or sand from entering the borehole, ensuring clean drilling environment.
Corrosion and wear resistance: Surface anti-rust treatment (galvanizing, painting) enhances durability in humid and corrosive strata, extending service life.
Easy installation and disassembly: Standard connection design enables quick assembly and retrieval of casing sections, reducing drilling downtime.
Good adaptability: Multiple specifications and connection types available, suitable for different drilling depths, hole sizes, and unstable overburden conditions.
Safety guarantee: Effectively isolates unstable strata and groundwater, avoiding borehole collapse and drill jamming, ensuring construction safety and hole forming quality.

Product Features

1.Rapid removal of cuttings;
2.No use of drilling mud;
3.High penetration rate, especially in resistant rock formation ;
4.Easy soil and groundwater sampling during drilling;
5.Possible to measure yield estimate at selected depth in the formation;
6.Advantageous in unconsolidated formations with a high risk of caving .

Application Scenarios

Deep pile foundation drilling: Borehole protection in loose overburden strata for high-rise buildings, bridges, and high-speed railways.

Water well and geothermal drilling: Isolating surface water and loose soil to ensure drilling safety and water quality in water well projects.

Geological exploration: Protecting boreholes in unstable overburden during shallow to deep stratum sampling and exploration.

Special foundation works: Borehole support for diaphragm walls, secant piles, and foundation pit anchoring in water-bearing or loose strata.

Application Range

It is suitable for drilling water wells, geothermal wells, short mircopiles ,medium mini-type grouting hole of building,dam and harbour project.
1. When drilling starts , the reamer swings out and reams the pilot-hole wide enough for the casing tube to slide down behind the drill bit assembly
2. When the required depth is reached , rotation is reversed carefully, whereupon the reamer swings in , allowing the drill bit assembly to be pulled up through the casing.
3. Casing tubes that are to be left in the drill hole should be sealed at the bottom of the hole by means of cement grout or some other sealing agent.
4. Drilling continues to the desired depth in the bedrock using a conventional drilling.