Concave Coal Mining Bit

Place of Origin China
Brand Name Hainaisen
Certification API & ISO 9001
Model Number 94NA33
Minimum Order Quantity 10 pieces
Price To be negotiable
Packaging Details customized
Delivery Time 5-7 business days
Payment Terms T/T, L/C
Supply Ability 300pcs per day

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Product Details
Name PDC Well Bit Concave Drill Bit Material Tungsten Carbide
Use Mining&Coal&Well Package Carton Box
Size Customized API Connection  63.5 With Stingers
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concave Coal Mining Bit


tungsten Coal Mining Bit


carbide deep well drill bit

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Product Description

94mm PDC Well Bit Concave Drill Bit Rock Drill Bit Water Drill Bit



1. The top surface of the bit is shallow with 3 small nozzles. and in the circumferential direction of the blades there are 3 big nozzles. The nozzles can rinse the bit and clean the rock debris away from the bottom of the hole quickly.Avoiding secondary fragmentation. They can also prevent the bit from being wrapped by the mud.

2. The gauge surface is inset by alloyed gauge strip which makes the gauge highly abrasive resistant and durable.

3. The cutters (model: 1308) are parallelly inset in the blades in symmetrical way. They are comprehensively high-performance cutters which makes the bit better abrasive resistant and strongly impact resistant. The rotary speed is faster.

4. The caster angle of the primary cutter can be adjusted from 16°to 20°, so the bit has the advantages of strong aggressivity, high rate of penetration and good stability.


Size 3- 7/10inch (Φ94mm)
Model number 94NA33
Body type High Manganese Steel
Number of blade 3
Primary PDC cutter size 1613
Number of nozzle 5
Diameter of nozzle 14 mm
Gauge length 29.2 mm
API connection 63.5 with Stingers
Suitable formation F≤12
Application Mining&Coal&Well
Quality High Level
Package Corrugated carton
MOQ 10 Pieces
Certificate ISO 9001
Customized Size Yes


Concave Coal Mining Bit 0

Concave Coal Mining Bit 1



Our drills will ship within 5 days after 50% full payment is confirmed. The drill bits will be shipped by sea or air as your request. And if you have any other questions, please contact us freely. Thanks!

Concave Coal Mining Bit 2


Our Principle

We adhere to the principles of high quality, high quality service, and innovation. We also insist on providing efficient products and quality services. If you are interested in our drills, please feel free to contact us. We are looking forward to cooperating with you!



1. Are you a trading company or manufacturer?

We have been a professional manufacturer of PDC bits since 2013.


2: Where is your manufacturer?
Our factory is located in Jing Wei Industrial Park of Economic and Technological Development Zone in Xi'an, China.


3: How about your products?
All our activities are accredited to ISO9001: 2008, both in products and services, at the same time, mature production technology ensuring the quality satisfy international request.We have many high quality prducts (the more information).


4: What is your trade terms?
We offer EXW, FOB, CIF.


5: What is your payment terms? 
Payment terms: normally 30% deposit, balance 70% before shipment. 

Payment methods: T/T, L/C.


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