roller core bit

IADC code

517

Bit size

8 1/2” (215.9mm)

Tooth type

TCI tooth

Thread connections

According to API Spec7-1 standard

Coon Pin

3 1/2 API. REG

Material

Tungsten carbide insert, inlaid friction-reducing alloy

Rotary speed

120~50 rpm

WOB

0.35~1.05 KN/mm

Cutting structure

The durability of premium tungsten carbide inserts is improved with new formulas and new techniques

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 increase gauge holding capability and bearing life

Nozzles

Three nozzles

Multiple gauge protection

Yes

Product Application

It is suitable for downhole motor and high speed applications and is the ideal selection for drilling directional and horizontal wells.

Bearing Structure

High precision journal bearing with two thrust faces. Ball lock the cone. Hardfaced head bearing surface. One 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.

Industrial standard of China

SY/T5164

Quality management system

ISO 9001-2008

Formations

Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft shale, soft limestone, etc.

Bit weight

45kg