Product Details

Welcome visit hengji bit company

7in old steel tooth tricone drill bit

Product Description

Cutting Structure

In response to the characteristics that inserts in different areas on the cone have different cutting actions,conical inserts are placed in permanent contact area and wedge inserts are placed in alternative contact area so that the drilling efficiency is greatly improved.Wear resistance of cutting structure is enhanced by setting diamond inserts in the permanent contact area of the cone where inserts are severely worn.Tungsten carbide inserts are placed on cone top face to protect cone body from abrasive erosion.

Gauge Structure

With active cutting gauge protection inserts on bit body,the bit has good gauge protection and updrill capability.

Bearing Structure

High precision journal bearing.Balls lock the cone.Hardfaced head bearing surface.Cone bearing inlaid with friction-reducing alloy.Abrasion resistance and seizure resistance of the bearing are improved .Compared with three cone bit,the leg bearing is bigger,so it can receive higher WOB and high reliability.

Hydraulic Design

Small angled watercourse design increased the shirttail thickness and can effectively prevent the watercourse erosion.Opitmized hydraulics structure improves the cleaning capability and increase ROP.

IADC	WOB(kN/mm)	RPM(r/min)	Formation
114115	0.3-0.75	180-50	Soft formation with low compressive strength and high drillability,such as mudstone,clay,chalk,etc
116117	0.3-0.8	150-70	Soft formation with low compressive strength and high drillability,such as mudstone,clay,chalk,etc
124125	0.3-0.85	180-60	Soft formation with low compressive strength and high drillability,such as mudstone,clay,salt,loose stands,soft limestone,etc
126127	0.3-0.9	150-60	Soft formation with low compressive strength and high drillability,such as mudstone,clay,salt,loose stands,soft limestone,etc
134135	0.35-0.95	150-50	Soft to medium formation with low compressive strength or soft with harder streaks,such as mudstone,shale,soft limestone ,sands,etc
136137	0.35-1.0	120-60	Soft to medium formation with low compressive strength or soft with harder streaks,such as mudstone,shale,soft limestone ,sands,etc
214215	0.4-0.95	150-60	medium hard formation with high compressive strength ,such as medium soft shale,anhydrite,medium soft limestone ,medium soft sandstone as well as thick and hard streaks,etc
216217	0.4-1.0	100-60	medium hard formation with low compressive strength ,such as medium soft shale,limestone and sandstone as well as thick and hard streaks,etc
244	0.35-0.95	150-50	medium hard formation with high compressive strength ,such as hard shale,sands ,limestone,etc
246247	0.4-1.0	80-50	medium hard formation with high compressive strength ,such as hard shale,sands ,limestone,etc
324325	0.4-1.0	120-50	hard formation with high strength and abrasiveness such as hard limestone,hard sands,dolomite,hard shale,etc