Úvodní stránka » Advertising & Marketing » Bi-center bit for Mining Machinery and abrasive formation5

Bi-center bit for Mining Machinery and abrasive formation5

Overview of Bi-center Bit

This type of Bi-center bit mainly used for medium to medium-hard compressive and abrasive formation, it has medium and high-density parabolic crown and heavy cutters density for the bit has good impact resistance and anti-abrasive, high wear-resistant diamond gauge, the bit has a longer service life.


In directional drill bit applications, Bi-centre bit performance usually presents performance challenges in terms of efficiency versus power availability and dynamic issues.


GREAT designed the bi-center bit to enlarge the wellbore diameter, to replace under reaming, to help control rouble zones and for expandable tubular.

The Specification of Bi-center Bit

Reaming Size 12 1/4″ Nozzle Qty 3NZ
Pass Thru Size 10 1/2″ Gauge Lenghth 2.5″
Blade 5 Connection 6 5/8″ API REG
Primary Cutter Size 16mm Make up Torque(kN.m) 51.7~56.9
Rotary Speed(rpm) 60~260 Weight on Bit(KN) 30~260
Max.WOB(KN) 180 Flow Rate(lps) 35~70



The Advantage of Bi-center Bit


Our Bi-center bit is one piece body, you will never worry broken.


We can adjust the bi-center diameter according to your casing diameter. Generally speaking, the bigger pilot bit has smaller reaming size. The smaller pilot bit has a bigger reaming size.


GREAT’s casing protection features cutting structure that provides a reliable way to drill, protecting both the cutting structure inside the casing and the casing itself.


During the design process, the pilot and reamer cutting structure are force balanced as a single unit. This provides increased drilling efficiencies in both vertical and deviated wells.We have directional drill bits for sale,  If you need, please contact us in time.


As the drill bit factory in china, Our brand is GREAT, founded in 2010, specialized in processing research of steel and diamond materials, is involved in the R&D, design, production, and sales of petroleum equipment, No-Dig. Up to now, we have to be the top material supplier of CNPC, SINOPEC, CNOOC. We have a 40,000 m² of production based in Hejian provincial development zone, Hebei, and several international advanced production lines featured in turning-milling compound, five-axis linkage, special for high-performance diamond processing, with the annual production capacity of more than 10,000 pcs. We provide the drill bits from 3″ to 36″, Rock reamer from 8”- 72”, Such as PDC bit, clay bit, Tricone bit, Roller bit, Diamond Core bit, Bi-center bit, PDC reamer, Hole opener, etc.。


All our employees look like a big family and do our best effect to work hard and make our great drill bits. But also we all have a thankful heart, Firstly we thankful our customers choosing us, and we will supply our best service with great quality products. Secondly, we thankful we have a great team, they teach us and we bringing up from GREAT.

Štítky: , ,

Napsat komentář

Vaše e-mailová adresa nebude zveřejněna. Vyžadované informace jsou označeny *


dva + = 6