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Eccentric Overburden Bit

ODEX/Eccentric equipment enables you to drill and case deep holes simultaneously in all types of formation, even those with large boulders. The method is based on a pilot bit and eccentric reamer,which together drill a hole slightly larger than the external diameter of the casing tube. This enables the casing tube to follow the drill bit down the hole. When using ODEX, part of the impact energy is diverted to the casing tube via a shoulder on the guide device, which in turn impacts a special casing shoe at the lower end of the casing.

Type

Casing Tube OD(mm)

Casing Tube ID(mm)

Casing wall thickness(mm)

Guide Device max size(mm)

Reamed Dia (mm)

Casing shoe mini Dia(mm)

Pilot bit D (mm)

Hammer type

ODEX85

108

94

7

92

117

86

85

COP34/DHD3.5

ODEX90

114

101

6.5

99

125

92

90

COP34/DHD3.5

ODEX98

127

109

9

107

138

100

98

COP34/DHD3.5

ODEX115

146

126

10

123.5

155

117

115

COP44/DHD340/SD4/QL40

ODEX140

168

148

10

146

180

138

136

COP54/DHD350/SD5/QL50

ODEX145

178

158

10

156

192

147

145

COP54/DHD350/SD5/QL50

ODEX152

183

163

10

161

196

153

151

COP54/DHD350/SD5/QL50             COP64/DHD360/SD6/QL60

ODEX165

194

174

10

172

206

162

160

COP64/DHD360/SD6/QL60

ODEX190

219

199

10

196

234

187

185

COP64/DHD360/SD6/QL60

ODEX208

245

225

10

222

263

210

208

COP84/DHD380/SD8/QL80

ODEX240

273

253

10

251

305

241

240

COP84/DHD380/SD8/QL80

ODEX280

325

300

12.5

298

350

282

280

DHD112/DHD38

 


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