YINHAI PRODUCTION WORKSHOP PROFILE

Tech Data of 4 5/8”  IADC537

TRICONE BITS   YHA 4 5/8-537G
Size(INCH/Metric Meter)：	4 5/8 INCH=117.475mm
IADC CODE：	5-3-7
Bearing Type：	Rubber Sealed Journal Bearing
Cutting Structure：	Tungsten Carbide InsertsInner and Nose Rows-SCOOPGauge Row-CHISEL Gauge Bevel Protections-FLAT
LEG/Shirttail Protection：	Hardmetal and Ovoid Insert
Pin Connection：	2 3/8” API REG
Net Weight/Gross Weight ：	12 KG/ 14KG
Package Size（mm*mm*mm）	150*140*240
Suitable Formation :Soft to medium formation with low compressive strength,such as mid-soft shale,mid -soft limestone, mid-soft sandstone and medium formation with harder abrasiveness interbeds

Note: This size of bit is not suitable for operation under high WOB and installation of nozzle. Note :The upper limits of WOB and RPM in above table should not be used simultaneously. 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. It can receive high WOB in the conventional drilling. It is suitable for various formations by matching cutting structure with different tooth shape, tooth density and tooth exposure height.