Eccentric Overburden Drilling Systems

. Available for casing sizes from 114mm (4 1/2") to 273mm (10¾") diameter Simple two-part design for better transfer of energy to Bit face . Optimal drilling performance in unstable ground conditions . The Eccentric Bit can be easily and quickly removed for replacement or refurbishment . "open and closed" locking arrangement inside the bit holder so nothing can prevent the Eccentric Bit from closing

Product Details

Roschen's ODS system is a proven two-part Eccentric Overburden Drilling system designed for the simultaneous drilling and casing of holes, through unstable ground conditions.


Key Features:
. Available for casing sizes from 114mm (4 1/2") to 273mm (10¾") diameter Simple two-part design for better transfer of energy to Bit face
. Optimal drilling performance in unstable ground conditions
. The Eccentric Bit can be easily and quickly removed for replacement or refurbishment
. "open and closed" locking arrangement inside the bit holder so nothing can prevent the Eccentric Bit from closing
. The ODS Bit has a positive pilot design which helps guide the Eccentric Bit and produce a straighter hole
 

Eccentric Casing System ( Eccentric Overburden Drilling System)
TypeCasing Recom.Size (mm)Min Inner Dia.of Casing shoe Dia(mm) DReaming Dia (mm) CDTH HAMMERDrill PipePart No.
Max.OD (A)Min.ID (B)Connection ThreadO.D.(mm)Wrench Flat(mm)
ODEX9011510290123DHD3.5API 2 3/8" Reg7665ODEX90-DHD
COP32ODEX90-COP
QL30ODEX90-QL30
ODEX115142128115152DHD340API 2 3/8" Reg7665ODEX115-DHD
COP44ODEX115-COP
SD4ODEX115-SD4
QL40ODEX115-QL40
Mission 40ODEX115-M40
ODEX140171157140187DHD350RAPI 2 3/8" Reg8965ODEX140-DHD
COP54ODEX140-COP
SD5ODEX140-SD4
QL50ODEX140-QL50
Mission 50ODEX140-M50
ODEX165196183165212DHD360API 3 1/2" Reg11495ODEX165-DHD
COP64ODEX165-COP
SD6ODEX165-SD6
QL60ODEX165-QL60
Mission 60ODEX165-M60
ODEX190222205190237DHD360API 3 1/2" Reg11495ODEX190-DHD
COP64ODEX190-COP
SD6ODEX190-SD6
QL60ODEX190-QL60
Mission 60ODEX190-M60
ODEX240273260240306DHD380API 3 1/2" Reg11495ODEX240-DHD
COP84ODEX240-COP
SD8ODEX240-SD8
QL80ODEX240-QL80
Mission 80ODEX240-M80
ODEX280327305280370SD10API 4 1/2" Reg11495ODEX280-SD
Numa100ODEX280-NU

ODEX
ROSCHEN produces ODEX Eccentric Overburden Drilling System, starting with the ODEX90 to ODEX445. This three -piece system comprises of pilot bit, reamer,guide device. ROSCHEN ODEX overburden drilling systems are widely used in a variety of applications from well drilling and mining to rock anchoring and site investigation.

Advtanges: 
- Rapid removal of cuttings; High penetration rate, especially in resistant rock formation;
- Easy soil and groundwater sampling during drilling;
- Possible to measure yield estimate at selected depth in the formation;
- Advantageous in unconsolidated formations with a high risk of caving

Application Range:
It is suitable for drilling water wells, geothermal wells, short mirco piles, 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. 


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