water /oil/gas well drilling IADC216/217 4 3/4" roller bits

Cutting Structure

In response to the characteristics that inserts in different areas on the cone have different cutting actions,conical inserts are placed in permanent contact area and wedge inserts are placed in alternative contact area so that the drilling efficiency is greatly improved.Wear resistance of cutting structure is enhanced by setting diamond inserts in the permanent contact area of the cone where inserts are severely worn.Tungsten carbide inserts are placed on cone top face to protect cone body from abrasive erosion.

Gauge Structure

With active cutting gauge protection inserts on bit body,the bit has good gauge protection and updrill capability.

Bearing Structure

High precision journal bearing.Balls lock the cone.Hardfaced head bearing surface.Cone bearing inlaid with friction-reducing alloy.Abrasion resistance and seizure resistance of the bearing are improved .Compared with three cone bit,the leg bearing is bigger,so it can receive higher WOB and high reliability.

Hydraulic Design

Small angled watercourse design increased the shirttail thickness and can effectively prevent the watercourse erosion.Opitmized hydraulics structure improves the cleaning capability and increase ROP.

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.

Perfect after-sales service

Supply use and maintenance support

Welcome to visit our company and inquire any other question, We will answer your questions in detail

guarantee period:3-4 years

• Hejian Hengji Bit Manufacture Co.,Ltd is established in 2012.It 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.

 1. How to order the products?
Answer:
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.china.cn/

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

TEL.:+86-317-8114222

QQ: 2197735445