Roller cone bits

Three cone bit is an important tool for oil drilling, its work performance will directly affect the quality of drilling, drilling efficiency and drilling costs. Three cone bit design is based on practical experience, combined with the test method, repeated design and calculation, and thus low design accuracy, long cycle, it is difficult to improve the design quality, and each calculation can only design a drill, low efficiency.

Featured products

SKV Series Six-Point Position Stabilization Motor Bit

• 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 increases gauge holding capability and bearing life.

• Bearing Structure

High precision journal bearing with two thrust faces,Balls lock the cone,Hardfaced head bearing surface.Cone 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.

• Seal and Lubrication

Advanced metal face seal lowers seal frictional force and improves seal life.The pressure compensator system and advanced grease can greatly increase the lubricating reliability.

• Six-Point Position Stablization Structure

The big leg is designed with specific integrated stablization structure,which provides near six-point connect with borehole wall for the bit,this new feature gives the bit unequaled stability which greatly reduces bit vibration,protects the cutting structure from damaging blows and keeps good borehole quality.The thickened nozzle wall can protect hydraulic system from the wear and fluid erosion.

• Product  Application

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

Current availability of Roller Cone Bits

Bit Size		Bit Type
in	mm
8 1/2	215.9	SKVT437G	SKVT447G	SKVT517G	SKVT527G	SKVT537G	SKVT547G	SKVT617G
9 1/2	241.3	SKVT437G	SKVT447G	SKVT517G	SKVT527G	SKVT537G	SKVT547G	SKVT617G
12 1/2	311.1	SKVT437G	SKVT447G	SKVT517G	SKVT527G	SKVT537G	SKVT547G	SKVT617G

Recommended Drilling Parameters

IADC	WOB (kN/m) (Bia Dia.)	RPM (r/min)	Applicable Formations
433 477	0.35~0.9	240~70	Very soft formations with low comprehensive strength and high drillability, such as clay, mudstone, chalk, gypsum, salt, soft shale, soft limestone.ect
517 527	0.35~1.0	220~60	Soft formations with low comprehensive strength and high drillability. such as, mudstone, gypsum, salt, soft shale, soft limestone. ect
537 547	0.45~1.0	220~50	Soft to medium formations with low compressive strength, such as medium soft shale, medium soft limestone, medium soft sandstone, medium information with harder and abRasiver interbeds, ect.
617	0.45~1.1	220~50	Medium formations with high compressive strength, such as hard shale, limestone, sandstone, dolomite, ect.

Note: The upper limits of WOE and RPM in above table should not be used simultaneously.