9 1/2 roller rock bit API IADC 517

Product Description

Structure:

*-Cutting Structure:Offset crested scoop compacts of

larger size were emloyed in inner row, wedge compacts

in heel row with uneven intervals inbetween and a row

of inserts is added between gage row and heel row to

trim borehole wall and protect cone shell.
 

*- Gage Protection:Multiple gage protectionwith gage

trimmers on the heel row and dedicated TCI inserts of

high strength and high toughness in combination with

optimized compact arrangements and exposure height

will highly incress the wear resistance and cutting

ability of the insert bits.

*- Bearing and Seal system:Sealed roller/journal

bearing structurewith rollers arraged in grooves

recessed in cone body and bigger bearing journal can

be better adopted with high WOB and hing RPM

Premium HNBR O-ring with optical seal compression and

curved seal structure as well as advanced special

grease can limit presure differential and prevent

drilling fluid from entering the lubrication system

and thus strongly assure the lubrication of the

bearing.

Applicable Formation:

Medium soft formation with low compressive strength

and hard abrasive intercalation, such as hardshale,

anhydrite, softlimestone, sandstone,

intercalationwithdolomite