17 1/2" SGA535XT

17 1/2"SGA535XT

Product profile

1. New rolling bearing structure prolongs the working life of the bearing, and has the ability to withstand medium bit pressure and adapt to high speed.
2. Updated O-shaped rubber sealing ring is more suitable for the working environment and operation parameters of roller cone bit.
3. Adopt high strength and wear resistance carbide insert, optimize the design of cutting rows, quantity, height and shape of insert, improve the efficiency and service life of cutting structure.
4. New sealing structure makes the sealing performance match with the bearing, thus greatly prolongs the service life of the drill bit.

Cutting layout

6-5-5

Applicable formation 

Designed for water well and HDD drilling, low compressive strength, medium soft, hard abrasive interbedded formation, such as hard shale, anhydrite, soft limestone, sandstone, interbedded dolomite, etc.

Lug protection

The shirttail of lug is protected by cemented carbide insert, the lug back is protected by welded wear-resisting carbide and ogive inserts.

Product Specification

IADC code:              535

Bit type:                17 1/2” SGA535XT

Bearing type:            Roller bearing/Rubber sealing ring

Circulation type:          Mud

Cutting structure:

Inner rows:              Wedge

Outer rows:              Off-wedge

Bevel row:               Flat

Pin connection:           7 5/8” REG

Bit diameter:             444 mm

Bit Weight:              223 kg

Operating suggestion

During normal drilling, weight on bit and rotation speed cannot be used at the same time:

Weight on bit:  0.35~0.8 kN/mm

Rotation speed:  80~200 r/min