7 7/8”mining tricone bit IADC 645 USED FOR SOFT LIMESTONE AND DOLOMITE

Cutting structure

Gauge rows are ovoid type and inner rows are conical type

Designed for medium hard and abrasive formation with high compressive strengths such as limestone, sandstone,dolomite and chert

Application :29000=38000psi(200-260mpa)

Shirttail protection

Two rows tungsten carbide on the shirttail , wear resistant carbide on the side of lug

Product specification

IADC CODE:645/642

BEARING TYPE :roller ball roller ,thrust button/sealed bearing/open bearing

Circulation type:jet air

Pin connection:4 1/2”API

Bit diameter:200mm(7 7/8”)

Product weight :34kgs

Operation suggestions

Weight on bit:23630-47250lbs

Rotary speed 100-60rpm

Air back pressure 0.2-0.4mpa

Tianjin huachang xingye technology co ltd

Email info@tjdrilling.com  whatsapp 008618902059907