Casing drilling, or casing while drilling (CWD) process, is a concept that combining two time-consuming processes, drilling and casing together, performing them at the same time. During the CWD process, powered by DTH hammer, a central piloting bit drives a ring bit to drill a hole wide enough for a casing tube to slide down, drilling and casing processes are therefore performed at the same time.
Eccentric is the most economical solutions because its ingenious reaming wing the bit is retrievable can be used at the next hole. This is particularly design for shallow holes, as is often the case in water well drilling, geothermal wells and for shallow micro-piling work. Odex is ideal for short holes in consolidated overburden. The component of Eccentric system consists of Pilot bits, Reamer bits, Guide device and casing shoe.
When drilling, the reamer bit will rotate out to enlarge the hole which enough for the casing tube slide down behind the reamer. When reached required depth, the drill pipe will drill to the reverse direction and the reamer bit will retract, it is allowing the whole drilling system to pass through the casing.
Features
• Complete types of drilling tools suitable for casing tubes with various diameters;
• Good stability and reliability granted by premium alloy steel material and fine CNC manufacturing process;
• Cost-effectiveness realized by mass production.
Applications
Water well drilling, geothermal well drilling, foundation piling, geological prospecting, etc.
Structure
Structure
01 – Drill Pipe
02 – Guide Sleeve
03 – Steel Casing
04 – DTH Hammer
05 – Guide Device
06 – Casing Shoe
07 – Reammer
08 – Pilot Bit
09- Guide Device
10 – Casing Shoe
11 – Reammer
12 – Pilot bit
GSE-EDS82 Eccentric Drilling System (ODEX82)
GSE-EDS82 Eccentric Drilling System (ODEX82) shank for IR3.5 DTH Hammer (other shanks are optional)
Alternative casings may by used:
Maximum outside diameter (mm)
108
Minimum inside diameter (mm)
96
Wall thickness (mm)
6
GSE-EDS90 Eccentric Drilling System (ODEX90)
GSE-EDS90 Eccentric Drilling System (ODEX90) shank for DHD3.5 DTH Hammer (others are optional)
Alternative casings may be used:
Maximum outside diameter (mm)
115
Minimum inside diameter (mm)
102
Wall thickness (mm)
6
GSE-EDS115A Eccentric Drilling System (ODEX115A)
GSE-EDS115A Eccentric Drilling System (ODEX115A) Shank for IR DHD340A DTH Hammer (others are optional)
Alternative casings may be used:
Maximum outside diameter (mm)
142
Minimum inside diameter (mm)
128
Wall thickness (mm)
7
GSE-EDS115B Eccentric Drilling System (ODEX115B)
GSE-EDS115B Eccentric Drilling System (ODEX115B) Shank for DHD340 DTH Hammer (others are optional)
Alternative casings may be used:
Manximum outside diameter (mm)
146
Minimum inside diameter (mm)
130
Wall thickness (mm)
8
GSE-EDS140 Eccentric Drilling System (ODEX140)
GSE-EDS140 Eccentric Drilling System (ODEX140) Shank for IR DHD350R DTH Hammer (others are optional)
Alternative casings may be used:
Maximum outside diameter (mm)
168
Minimum inside diameter (mm)
152
Wall thckness (mm)
8
GSE-EDS145 Eccentric Drilling System (ODEX145)
GSE-EDS145 Eccentric Drilling System (ODEX145) Shank for IR DHD350R DTH Hammer (others are optional)
Alternative casings may be used:
Maximum outside diameter (mm)
178
Minimum inside diameter (mm)
158
Wall thickness (mm)
9
GSE-EDS147 Eccentric Drilling System (ODEX147)
GSE-EDS147 Eccentric Drilling System (ODEX147) Shank for IR DHD350R DTH Hammer (others are optional)
Alternative casing may be used:
Maximum outside diameter (mm)
183
Minimum inside diameter (mm)
163
Wall thickness (mm)
10
GSE-EDS165 Eccentric Drilling System (ODEX165)
GSE-EDS165 Eccentric Drilling System (ODEX165) Shank for IR DHD360 DTH Hammer (others are optional)
Alternative casings may be used:
Maximum outside diameter (mm)
195
Minimum inside diameter (mm)
182
Wall thickness (mm)
6.5
GSE-EDS180 Eccentric Drilling System (ODEX180)
GSE-ED180 Eccentric Drilling System (ODEX180) Shank for DHD360, COP64, SD6 DTH Hammer
Alternative casing may be used:
Maximum outside diameter (mm)
219
Minimum inside diameter (mm)
194
Wall thickness (mm)
12.5
GSE-EDS190 Eccentric Drilling System (ODEX190)
GSE-EDS190 Eccentric Drilling System (ODEX190) Shank for IR DHD360 DTH Hammer (others are optional)
Alternative casings may be used:
Maximum outside diameter (mm)
219
Minimum inside diameter (mm)
205
Wall thickness (mm)
7
GSE-EDS230 Eccentric Drilling System (ODEX230)
GSE-EDS230 Eccentric Drilling System (ODEX230) Shank for IR DHD380 DTH Hammer (others are optional)
Alternative casings may be used:
Maximum outside diameter (mm)
273
Minimum inside diameter (mm)
250
Wall thickness (mm)
11.5
GSE-EDS240 Eccentric Drilling System (ODEX240)
GSE-EDS240 Eccentric Drilling System (ODEX240) Shank for IR DHD380 DTH Hammer (others are optional)
Alternative casings may be used:
Maximum outside diameter (mm)
273
Minimum inside diameter (mm)
260
Wall thickness (mm)
6.5
INQUIRY
You can contact our head-office directly, also you can contact our agent which is near you. Of course, free live-chat is available and you can get help immediately.
