drilling and mining 12 1/4" IADC617 tungsten carbide tricone bits

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$100.00 - $10,000.00 / Piece | 1 Piece/Pieces (Min. Order)
Tungsten Carbide
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Quick Details
Place of Origin:
Hebei, China
Brand Name:
Model Number:
12 1/4 " 311.1mm
Tungsten Carbide
Well Drilling
Countersink Drill Bit
blue red gooden
Supply Ability
Supply Ability:
500 Piece/Pieces per Month
Packaging & Delivery
Packaging Details
wooden case
Picture Example:


Product Description

  1,Brief introductions


a :size 12 1/4"   311.1mm ,API Pin: 6 5/8"

b:material:tungsten carbide ,Alloy steel


d:Nozzle OD:20.3mm,Assembly length:17.5mm

e:cutter type:round





Applicable Formations




medium hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc.




1)Cutting structure

The wear-resistance of teeth is enhanced with premium tungsten carbide hardfacing on the tooth surfaces for steel tooth bit.The durability of premium tungsten carbide inserts is improved with new formulas and new techniques for insert bit.


2)Gauge structure

Multiple gauge protection with gauge trimmers on the heel and gauge inserts on the gauge surface of the cone ,tungsten carbide inserts and hardfacing on the shirttail increases gauge holding capability and bearing life.


3)Bearing structure


High precision journal bearing with two thrust faces.Balls lock the cone.Hardraced head bearing surface.Cone bearing inlaid with friction-reducing alloy and then silver-plated.Abrasion resistance and seizure resistance of the bearing are improved,and suitable for high rotary speed.


4)Seal and lubrication


The advanced metal seal package consists of two metal seals and two elastic energizers.Compressed energizers ensure good contact being kept on two sealing surfaces of metal rings by elastic force,and achieves the bearing seal.In the drilling,metal seals are relatively dynamic,and the energizers are static.This will improve the reliability and durability of bearing seal .The pressure compensator system and advanced grease can greatly increase the lubricating reliability.


5)Product application:


It can receive high WOB in the conventional drilling .It is suitable for various formations by matching cutting structure with different tooth shape,tooth density and tooth exposure height.

   3,The process

a,make of  the cone

b,make of the palm



d,welding and coloring

Packaging & Shipping



Company Information


  • Hejian Hengji Bit Manufacture Co.,Ltd is located in hejian,hebei province.It is emerging enterprises in Chinese bit industry.It is mainly engaged in the development,production and sales of all kinds of bits.
  • It has developed and mass-produced products 3 to 26 inches series steel tooth bits and tricone bits,various types of PDC bits,core bits and production and processing assembly 0.6m to 3 m large diameter drill bits.



Our Services

"Hengji bit,focusing on quality" is our idea."Top quality products and excellent services" is our unchanged corporate concert.

In processing,we control the quality strictly.After qualified ,then permit to next stage. The products are qualified ,then permit to the market.."Hengji bit,focusing on quality" is our idea."Top quality products and excellent services" is our unchanged corporate concert.


If you have any suggestions about my company and the product ,please do not hesitate to tell me,we will improve all the time.If you have any  difficulty for the selection,our engineer may help you .If you have any problems in the use,we will provide the technical support.


Instructions for use:

1,According to the stratigraphic lithologic data, hydraulic and drilling parameters, choose the type of drill bit.

2,According to the hydraulic parameters, choose corresponding nozzle .nozzle hole size difference should not be too large, so as to avoid erosion channel.

3,Before drill down, check the drill bit size, type size is consistent with the well, the nozzle is installed, connected with the drill bit screw thread specification and the joint compliance.

4,The drill bit should be under well as the operation rules.bit and bottom contact, It must operate 30 minutes under light pressure and slow turning (drilling pressure 5-15kN, speed 60r/min) , then can be gradually increased to the normal drilling pressure.


1,Do not use the maximum WOB and maximum RPM at same time!

2,The bottom must be clean, various types of drill do not reaming, slow decentralization, prohibited the pier drilling.


3,Drilling operation must be stable, if have abnormal phenomenon ,such as bit bouncing ,should be timely analysis and take effective measures.




  1. How to order the products?
Send the inquiry with detail item description or with Model number.
If there is no packing demand we take it as sea-way packing.
If possible please attach one reference picture to avoid any misunderstanding or any links from our website for we get a better understanding.  http://hengjibit.en.alibaba.com/

2. About delivery time?
Answer :
The delivery time depend on quantity of order. Usually shipped by sea, small order or urgent order we can send you by air after received your agreement.

3.Can I expect a quality products?
Answer :
Yes. All our activities are accredited to ISO 9001:2008 , both in products and services, at the same time, mature production technology ensuring the quality satisfy international request.

Contact information:

Name:Ocean yang



QQ: 2197735445


in the oil,natural gas,hydrology,address,drilling engineering ,tunnelling,quarring,etc.