Tricone Bits

Product Introduction

Cutting Structure
High quality tungsten carbide inserts with the latest technology are adopted to improve the comprehensive mechanical properties of the bit.

Gauge Structure
Multiple gauge protection with gauge trimmers on the heel of cone,tungsten carbides insert and hard
facing on the shirttail increases holding capability and bearing life.

Bearing Structure
High precision journal bearing with two thrust faces.Balls lock the cone.Hard faced head bearing surface.Cone bearing inlaid with friction-reducing alloy and then silver plated.Abrasion resistance and seizure resistance of the bearing are improved.

Seal and Lubrication
Premium HNBR O-ring,optimal seal compression and curved seal structure can enhance the seal performance. The pressure compensator system and advanced grease can greatly increase the lubricating reliability.

Product Application
It can bear high WOB in the conventional drilling.t is suitable for various of formations by matching
cutting structure with different tooth shape,tooth density and tooth exposure height.

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Technical data

IADC	Applicable Formatitons	Recommended Parameters
IADC	Applicable Formatitons	WOB KN/mm	RPM(r/min)
417/427/437	Low compressive strength,high il-abilityt and extremely soft formation,like shale,clay.sandstone,conglomerate etc.	0.35-0.90	140-70
447	Low compressive strength,high drill ability and soft formation, like shale, clay, sandstone, soft limestone, salt rock,plaster etc.	0.37-1.00	140-60
517	Low compressive strength,high dril ability and soft formation,like shale, clay, sandstone, soft limestone,salt rock,etc.	0.37-1.05	120-50
527	Soft formation with low compressive, like Low compressive strength, high dilabilityt and soft formation,like shale,clay sandstone, soft limestone, salt rock,anhydrite etc.	0.35-1.05	120-50
537/547	Low compressive strength,medium hard formation with hard abrasive interlayer, like Hard shale, anhydrite, soft limestone, sandstone, dolomite with mezzanine, etc.	0.50-1.05	110-40
617/627	High compressive strength, medium hard and thick hard interlayer, like hard shale, limestone, sandstone, dolomite,etc.	0.50-1.05	80-40
637/737	High compressive strength, medium hard and high abrasive formation, like limestone, dolomite, sandstone, chert, etc.	0.70-1.20	70-40

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