|Place of Origin:||Hunan, China (Mainland)|
|Model Number:||Concentric casing system|
|Minimum Order Quantity:||1 Set|
|Packaging Details:||Wooden outer , and cartons inner|
|Delivery Time:||within 20 days after full payment|
|Payment Terms:||L/C, T/T|
|Supply Ability:||500 Set/Sets per Month|
|Machine Type:||Drilling Tool||Material::||Alloy Steel|
|Wall Thichness Of Casing Tube::||6.5~10mm||Inner Dia. Of Casing Tube::||101~199|
Concentric System Symmetrix Overburden Casing System With Wings
It is recommended to drill in rock formation where contains some ovals and fracture.
The stabel and reliable working performance and the less vibration of drill rig.
Concentric system with ring bits,with wings and with blocks.
1. when the drilling starts, the wings swing out, and reams to drive the casing shoes and tubes into the hole.
2. When finished the drilling in overburden rock formations, reverse the drilling tools and the wings will get closed, and the drilling tools can be raised from the hole.
3. Next construction can be followed.
first class special alloy steel with high strength, heat resistance and wearable
The best tungsten carbides from China are commonly applied.
Tungsten carbide from European is also available.
|Outer Dia. of Casing Tube||Inner Dia. of Casing Tube||Reamed Dia.||Min. Inner Dia. of Casing Shoe||
How to complete the whole deal
1. Firstly decide the design, material and color
2. Decide the size in accordance with client's requirement and our
3. We will give the best offer.
4. Client's accept the offer and we send proforma invoice.
5. Client transfers 30%-50% deposit and production begins
6. After production, we will send ready products photo
7. After client's confirmation, we will arrange shipment, and send
copy shipping documents like B/L, commercial invoice and
8. Client transfer balance payment and we will send original
documents by DHL or EMS