70mm drag drill bit

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.

 our desigan:

• 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. As a leading manufacturer of tricone bit and PDC bits, our products are made strictly complying with API specifications and ISO9001.
• We have 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.We ship to more than 30 countries and serve industries such as oil &gas, water well, construction, mining, horizontal directional drilling(HDD) ,geothermal and environmental. Our experienced staff is here to assist you with everyting from choosing the right bit to shipping around the globe.
• Our goal is provide our customers with the best quality tools, accessories and service in the industry. We are supported by many years of experience, trained professionals and a full machine shop. Reduce the cost, speed the drilling, guarantee the safety is always our aim.

 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.

4.Trade Terms:

 payment:T/T. 30%deposits,70% before delivering.

If you have any questions ,pl tell me ,it is my pleasure to reply you.