6 1/2" SHV637YT

6 1/2" SHV637YT

• Product profile

1. Journal bearing has the ability to withstand medium pull down and adapt high rotation speed.
2. The new flat seal bearing structure is adopted, which increases the stability of the seal structure and greatly prolongs the working life of the bearing.
3. Oil storage system can balance the pressure difference and provide a good lubrication guarantee for the bearing system.
4. Y feature, the main cutting rows insert shape are conical, which have strong ability to resist fracture and break into formation, suitable for drilling in the formations such as hard and brittle formations and gravel-bearing interlayers.
5. T feature, between the outer rows and cone back rows inserted a protection row carbide inserts.

• Cutting rows layout

5-4-4

• Applicable formation 

Designed for water well and HDD drilling, high compressive strength, medium hard and abrasive formations, such as limestone, dolomite, sandstone, chert, etc.

• Lug protection

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

• Product Specification

IADC code:              637

Bit type:                6 1/2” SHV637YT

Bearing type:            Journal bearing/Rubber sealing ring

Circulation type:          Mud

Cutting structure:

Inner rows:              Conical

Outer rows:              Spherical

Bevel row:               Flat

Protection row:           Wedge

Pin connection:           3 1/2” REG

Bit diameter:             165 mm

Bit weight:              18 Kg

• Operating suggestion

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

Weight on bit:  0.6~1.2 kN/mm

Rotation speed: 40~80 r/min