Overburden casing drill collar bits, pilot bits, concentric drilling equipment

We are a leading manufacturer of rock drilling tools, like DTH hammers and bits, DTH drill pipes, RC hammers and bits, top hammer button bits, coupling, cross bits, drill rods located in Xiamen,Fujian,China.Product specifications: Concentric/Symmetric Casing overburden Drilling System with Ring Bit Casing TubeOD(mm)Cas

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Overburden Casing Drilling Ring Bit, Pilot Bit, Concentric Drill Equipment

We are a leading manufacturer of rock drilling tools, like DTH hammers and bits, DTH drill pipes, RC hammers and bits, top hammer button bits, coupling, cross bits, drill rods located in Xiamen,Fujian,China.

Product specifications: Concentric/Symmetric Casing overburden Drilling System with Ring Bit

Overburden Casing Drilling Ring Bit, Pilot Bit, Concentric Drill Equipment
 

Casing Tube

OD(mm)

Casing Tube

ID(mm)

Reamed Dia(mm)

Casing Shoe

ID(mm)

Polit bit

Dia(mm)

Hammer

Type

Drill Pipe

(mm)

108

95

118

80

70

DHD3.5/QL30

76

114

101

128

90

80

DHD3.5/QL30

76

127

114

141

100

90

DHD3.5/QL30

76

140

124

154

110

98

DHD340/QL40

76

146

126

160

114

102

DHD340/QL40

76

168

148

182

132

120

DHD350/QL50

76/89

178

158

192

142

130

DHD350/QL50

76/89

183

163

198

152

138

DHD350/QL50

89/114

194

174

210

164

148

DHD360/QL60

89/114

219

199

235

184

170

DHD360/QL60

89/114

245

225

261

210

192

DHD380/QL80

114

273

253

293

238

219

DHD380/QL80

114/127

325

305

348

294

270

SD10/NUMA100

127

406

382

426

374

350

SD12/NUMA125

140

 

The Concentric/Symmetric casing system product line includes the enhanced system with striking faces and extracting highly resistant.

In horizontal drilling, the friction between the soil and the casing can become very important and Symmetrix reinforced bits are designed to resist abrasion under these conditions.

These systems are targeted for drilling in leading which the cutting ring is recovered for reuse. They can also be used for drilling deep holes vertical when it is not necessary to use an inside diameter of annular cutting important.

Reinforced systems are available for tubing sizes ranging between 140 mm and 1220 mm (5 1/ 2 "and 48").

Quality warranty
Our products are made of high quality steel and all spares parts are inspected strictly before shipping. 

Production time
within 15-25 days after receiving the advance payment or full payment.

Transportation
according to your requests.

Package
The material of packing is ply-wooden cases and pallet to avoid the damage in transportation.

Overburden Casing Drilling Ring Bit, Pilot Bit, Concentric Drill Equipment
Overburden Casing Drilling Ring Bit, Pilot Bit, Concentric Drill Equipment
Overburden Casing Drilling Ring Bit, Pilot Bit, Concentric Drill Equipment

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