ODEX Eccentric Overburden Casing Drill System

ODEX (short for “Overburden Drilling Eccentric”) is also called Stratex, tubeX or ODS. It is an adaptation of the air-circulation DTH hammer. It is with a swing-out eccentric bit to ream the bottom of the casing. And the percussion bit consists of two parts fixed tips: a concentric pilot bit,...

Product Details

ODEX (short for “Overburden Drilling Eccentric”) is also called Stratex, tubeX or ODS. It is an adaptation of the air-circulation DTH hammer. It is with a swing-out eccentric bit to ream the bottom of the casing. And the percussion bit consists of two parts fixed tips: a concentric pilot bit, and behind it is an eccentric reamer bit that swings out to enlarge the borehole diameter during drilling. After the eccentric bit is a guide device that engages a special internal shouldered casing shoe on the bottom of the ODEX casing. The ODEX is thus pulled down by the drill string as the hole is advanced. Cuttings blow up through the annulus gap between guide device and casing shoe to a swivel conducting them onto the ground or to a sample collector.

ODEX casing drilling system

ODEX casing drilling system


Casing advancer

Casing advancer


ODEX systems are most economical solutions for casing drilling in average ground conditions. They are very popular with drilling contractors for casing in water wells, geothermal wells, medium mini-type grouting hole of building, dam and harbour project, and shallow micro-piling work. Because of the ingenious reaming wing, the bit is retrievable and can be used again. ODEX is ideal for short holes in homogenous overburden, thanks to outstanding advantages as simple structure, easy operation, retrievable drilling tools, long service life and good quality. Drilling characteristics of ODEX systems are essentially the same as for the DTH hammer drilling method, like: 

1. Rapid removal of cuttings; 

2. High penetration rate, especially in resistant rock formation (e.g. basalt); 

3. Easy soil and groundwater sampling during drilling; 

4. Possible to measure yield estimate at selected depth in the formation; 

5. Advantageous in unconsolidated formations with a high risk of caving (this is probably the most important feature). 


Roschen drills has ODEX types ranging from ODEX90 to ODEX280, produced with shanks of most of the prevailing DTH hammers sizing from 3” to 10”. They all consist of Guide Device, Casing Shoe, Eccentric Reamer, Pilot Bit, Guide Sleeve, and Locking Kits. 


 Specifications:  

ODEX Type

Recommended Casing Size

Min. Wall Thickness

Pilot Bit Diameter

Reamer Diameter

For Shanks of Hammer

Max. OD

Min.  ID

mm

inch

mm

inch

mm

inch

mm

inch

mm

inch

90

115

4 1/2

102

4

6

15/64

90

3 35/64

123

4 27/32

DHD3.5, Cop34, Mission 30

115

142

5 19/32

125

4 59/64

7

9/32

115

4 17/32

155

6  7/64

DHD340A, SD4, QL40, Mission40

115

146

5 3/4

128

5  3/64

7

9/32

116

4  9/16

152

6

140

168

6 5/8

152

5 63/64

8

5/16

140

5 1/2

189

7  7/16

DHD350R, SD5, QL50, Mission50

144

178

7

160

6 19/64

9

23/64

144

5  9/16

192

7  9/16

165

196

7 23/32

183

7 13/64

6

15/64

166

6 17/32

211

8 19/64

DHD360, SD6, QL60, Mission60

180

219

8 5/8

194

7 5/8

6

15/64

179

7  3/64

232

9 1/8

190

219

8 5/8

205

8  1/16

7

9/32

191

7 1/2

236

9 19/64

190

219

8 5/8

205

8  1/16

7

9/32

191

7 1/2

236

9 19/64

DHD380, QL80, SD8, Mission 80

230

273

10 3/4

250

9 27/32

11.5

29/64

229

9  1/64

286

11 1/4

240

273

10 3/4

250

9 27/32

11.5

29/64

241

9 31/64

308

12 1/8

280

324

12 3/4

305

12

9.5

3/8

280

11  1/64

378

14 57/64

SD10, NUMA100


ROSCHEN GROUP is professional in manufacturing and supplying quality odex eccentric overburden casing drill system as one of the leading manufacturers and suppliers in China. We now bring you high quality odex eccentric overburden casing drill system for sale, competitive in its excellent performance and high precision. Please rest assured to buy.
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