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O.D. 325mm Concentric overburden casing with blocks for water well projcet

O.D. 325mm Concentric overburden casing with blocks for water well projcet

O.D. 325mm Concentric overburden casing with blocks for water well projcet

Product Details:

Place of Origin: Hunan, China (Mainland)
Brand Name: Teamwhole
Certification: ISO9001:2008
Model Number: T280

Payment & Shipping Terms:

Minimum Order Quantity: 1 Set/Sets Concentric overburden drill bit
Price: Negotiation
Packaging Details: Concentric overburden drill bit are packed Inner package with cartons,outer package with wooden cases.
Delivery Time: Shipped in 25 days after payment
Payment Terms: L/C, T/T
Supply Ability: 5000 Set/Sets per Month Concentric overburden drill bit
Detailed Product Description
Place Of Origin: Hunan, China (Mainland) Brand Name: Teamwhole
Type: Concentric Casing System Model: T280
Casing Tube O.D.: 325mm Casing Tube I.D.: 305mm
Wall Thickness: 10mm Max Guide Device Dia.: 302mm
Reamed Dia.: 350mm Max. Normal Bit O.D.: 282mm
Hammer Type: COP84/DHD380(TH8)/SD8/QL80

O.D. 325mm Concentric overburden drill bit with blocks

 

Specification

 

1.Face: Flat,Convex,Concave,Drop-center.
2.Carbide Button Shape: Spherical,Semi-ballistic,Ballistic and Two-step
3.Bit Shank: COP/DHD/QL/SD/MACH/BR

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

Concentric overburden drill bit with blocks for water well projcet

 

General Introduction

 

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.

 

Raw Material

 

Steel:

first class special alloy steel with high strength, heat resistance and wearable


Carbide
The best tungsten carbides from China are commonly applied.
Tungsten carbide from European is also available.

 

Strangthening measures for manufacturing

Raw Material

1. The material of tool joint is better than casing tube and through heat treatment to ensure the reliability.

2. Caing shoe through heat treatment ensures long service life.

3. Blocks and locking system through strengthening treatment for good comprehensive performance.

 

Contact Details
Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.

Contact Person: Ms.chen

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