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Concentric Overburden Drill Bit

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US$ 2,000 - 3,500 MOQ: 1 Set
Key Specifications
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Place of Origin:
Hunan, China
Brand Name:
tianhe
Model Number:
Symmetric overburden casing system 90-219
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Changsha Tianhe Drilling Tools And Machinery Co., Ltd.
Payment & Shipping
Payment Methods:
Port of Shipment:
Shanghai
Delivery Detail:
Delivery time depends on order quantity.

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Place of Origin Hunan, China
Brand Name tianhe
Model Number Symmetric overburden casing system 90-219
Type Other, casing systems
Material Other, carbides, Carbide
Use Well Drilling

Specifications

applied to the drilling where rock formation is overburden
and need casing tube to support
Certificate: ISO9001:2008,SONCAP

Application Range

It is recommended to drill in rock formation where contains some ovals and fractures.

Design Principles

 Make the casing follow easy and the equipment and operation simple 

Outstanding Advantages

1.The stable and reliable working performance and the less vibration of drill rig.

2.Flexible to open and close.

Operation Procedure

1.when the drilling starts, the blocks slides down through the grooves on pilot bit,and reams to drive the casing shoes and tubes into the hole.

2.When finished the drilling in overburden rock formations, raise the drilling tools and the blocks will get closed through the grooves , and the drilling tools can be pulled out from the hole.

3. Next construction can be followed.

Order Guide:  A+B+C+D+E

Specifications

A 

B

C

D

E

F

Outer Dia. of 

Casing Tube

 Inner Dia. of 

Casing Tube

 Reamed 

Dia.

 Min. Inner Dia. of 

Casing Shoe

Hammer Type

 Drill Pipes

mm

mm

mm

mm

 

mm

168

149-155

184

140

TH122

76,89

178

159-165

194

150

TH122

76,89

193

173-180

206

164

TH139

89,114

219

199-206

234

182

TH139,TH180

89,114

244

224-231

260

210

TH180,TH220

114

273

251-257

305

240

TH180

114,127

323

301-310

348

284

TH180,TH220

127

406

382-388

440

364

TH220,TH275

127,140

457

433-439

488

413

TH275

127,140

508

484-490

538

464

TH275

140

558

534-540

590

514

TH275,TH398

140

610

586-592

642

566

TH275,TH398

140,168

660

636-642

694

615

TH398

168

711

687-693

745

665

TH398

168

762

738-744

798

716

TH600

168

863

839-845

900

815

TH600

168

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Changsha Tianhe Drilling Tools And Machinery Co., Ltd.
Business Type
Manufacturer, Trading Company
Year Established
2002
Factory Size
50,000-100,000 square meters
Total Employees
201 - 300 People
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