eccentric overburden drilling
eccentric overburden drilling Tubex XL 165 used for Casing
Advancement Systems
ODS SYSTEM
Overburden Drilling system
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) |
Type | Casing Recom.Size (mm) | Min Inner Dia.of Casing shoe Dia(mm) D | Reaming Dia (mm) C | DTH HAMMER | Drill Pipe | Part No.* |
Max.OD (A) | Min.ID (B) | Connection Thread | O.D.(mm) | Wrench Flat(mm) |
ODEX90 | 115 | 102 | 90 | 123 | DHD3.5 | API 2 3/8" Reg | 76 | 65 | ODEX90-DHD |
COP32 | ODEX90-COP |
QL30 | ODEX90-QL30 |
ODEX115 | 142 | 128 | 115 | 152 | DHD340 | API 2 3/8" Reg | 76 | 65 | ODEX115-DHD |
COP44 | ODEX115-COP |
SD4 | ODEX115-SD4 |
QL40 | ODEX115-QL40 |
Mission 40 | ODEX115-M40 |
ODEX140 | 171 | 157 | 140 | 187 | DHD350R | API 2 3/8" Reg | 89 | 65 | ODEX140-DHD |
COP54 | ODEX140-COP |
SD5 | ODEX140-SD4 |
QL50 | ODEX140-QL50 |
Mission 50 | ODEX140-M50 |
ODEX165 | 196 | 183 | 165 | 212 | DHD360 | API 3 1/2" Reg | 114 | 95 | ODEX165-DHD |
COP64 | ODEX165-COP |
SD6 | ODEX165-SD6 |
QL60 | ODEX165-QL60 |
Mission 60 | ODEX165-M60 |
ODEX190 | 222 | 205 | 190 | 237 | DHD360 | API 3 1/2" Reg | 114 | 95 | ODEX190-DHD |
COP64 | ODEX190-COP |
SD6 | ODEX190-SD6 |
QL60 | ODEX190-QL60 |
Mission 60 | ODEX190-M60 |
ODEX240 | 273 | 260 | 240 | 306 | DHD380 | API 3 1/2" Reg | 114 | 95 | ODEX240-DHD |
COP84 | ODEX240-COP |
SD8 | ODEX240-SD8 |
QL80 | ODEX240-QL80 |
Mission 80 | ODEX240-M80 |
ODEX280 | 327 | 305 | 280 | 370 | SD10 | API 4 1/2" Reg | 114 | 95 | ODEX280-SD |
Numa100 | ODEX280-NU |
* Complete system comprises Bit Holder, Eccentric Bit, and Locking
Pins. Other shank styles available on request
The ODS is a two part eccentric overburden drilling system designed
for the simultaneous installation of casings to support unstable
ground conditions.
The bit holder is fitted into the hammer in the same way as a
conventional button bit would be.
The eccentric button bit is locked into the bit holder by means of
a double 'Seloc' pin arrangement which can be removed when the bit
needs either regrinding or replacing.
ROSCHEN only supply threaded casings but the system can also be
used with less expensive welded casings when the casing is required
to be left in the hole.
When the ODS system has been drilled to the required depth, the
eccentric bit can be closed to its concentric position by pulling
up against the casing shoe and counter rotating 180 degrees, and
the complete system withdrawn from the casing.
If required, it is then possible to drill on into solid rock using
a conventional button bit of a diameter equal to the system size.
It is important to make sure that a stabiliser of the correct
dimensions is positioned directly behind the hammer.
ROSCHEN manufactures a range of bit holders, eccentric bits, casing
shoes and stabilisers, to accompany our ODS drilling systems. For
more product details, please consult our technical sales brochures
or contact our sales team for assistance.