8 1/2′′pdc Oilfield Drilling Bit Gas Drilling Rock Bit

• Type: Petroleum Drilling Machine
• Usage: Well Drilling
• Certification: ISO
• Cutters: 13 16 19
• Blades: 3-9
• Transport Package: Wooden Case
• Specification: according requirement
• Trademark: HJ
• Origin: Hebei
• HS Code: 8207191
• Production Capacity: 100

Product Description

Basical Specification
Size of bit	8 1/2''
Number of Blades	5
Primary Cutter Size	16mm
Nozzle Qty.	5NZ
Thread Connection	4 1/2  REG PIN
Operating Parameters
RPM (r/min)	60~300
WOB(KN)	20~110
Application	Soft to medium hard formation with low compre-ssive strength with hard layer.Such as caly, sands-tone, tuff, etc.

Product Description-----high quality PDC drill bit :
1. Cutting structure is force balanced and bit blade is asymmetrically designed so that the load on 
bit is balanced that 
resulting better stability of the bit.
2. Main cutter are high performance PDC cutters to insure service life of the bit while improving ROP.
3. Cutter exposure is optimized to insure the bit can achieve higher ROP is soft to medium formations.
4. Shock absorbers are designed to make the bit capable of drilling through formations with hard strigers.
5. Hydraulic system of the bit is optimized using dynamic flow pattern simulation technology to enhance 
cleaning and 
cooling effects of the bit to effectively prevent bit from balling.

Inch	MM	AP(thread)	Blades
4inch	101.6mm	2 7/8	3 blades 4 blades 5 blades 6 blades 7 blades
4 1/2inch	114.3mm
4.5/8inch	117.5mm
4 3/4inch	120.5mm
5 1/8inch	130.2mm
5 1/4inch	133.4mm
5 3/4inch	146mm
5 7/8inch	149.2mm	3 1/2	3 blades 4 blades 5 blades 6 blades 7 blades
6inch	152.4mm
6 1/8inch	155.6mm
6 1/4inch	158.7m
6 11/32inch	161mm
6 1/2inch	165.1mm
6 3/4inch	171.4mm
7 1/2inch	190.5mm	4 1/2	4 blades 5 blades 6 blades 7 blades 8 blades
7 5/8 inch	193.7mm
7 7/8 inch	200mm
8 3/8 inch	212.7mm
8 1/2 inch	215.9mm
8 3/4 inch	222.3mm
9 11/64 inch	233mm
9 1/2 inch	241.3mm	6 5/8	4 blades 5 blades 6 blades 7 blades 8 blades 9 blades
9 5/8 inch	244.5mm
9 7/8 inch	250.8mm
10 1/2 inch	266.7mm
10 5/8 inch	269.9mm
11 inch	279.4mm
11 5/8 inch	295.3mm
12 inch	304.8mm
12 1/4 inch	311.1mm
13 3/4 inch	349.25mm	7 5/8	4 blades 5 blades 6 blades 7 blades 8 blades 9 blades
14 3/4 inch	374.65mm	7 5/8
15 1/2 inch	393.7mm	7 5/8
17 1/2 inch	444.5mm	7 5/8

Company Information

 Hejian Hengji Bit Manufacture Co.,LTD  is specialized in manufacturing high quality rock bit,especially for tricone bit,PDC bit,hole opener,single cone bit and drag bit.with advanced CNC machines and R&D team and on-time delivery. We have kept our clients ahead of schedule and under budget by providing the highest quality tools at the best possible prices .
    We ship to more than 40 different 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 everything from choosing the right bit to shipping around the globe.
     Our goal is to 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.  We have been always insist on"Hengji bit,focusing on quality".  
 

Main products
tricone bit(mill tooth and tungsten carbide insert tricone bit)
PDC bit(matrix body and steel body PDC bit)
hole opener(HDD rock reamer,barrel reamer,etc)
drag bit(step drag bit,PDC drag bit,chevron drag bit,etc)
accessories(single cone,bit breaker,nozzle ,etc)