Qingdao Nokunda Drilling Tools Co., Ltd.

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Qingdao Nokunda Drilling Tools Co., Ltd.  

 No. 15 Donghai Xi Road, Shinan District, Qingdao City, Shandong Province, China

Whatsapp: +86 13792983690

Wechat: +86 13792983690 

Email: [email protected]

 

 

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9 7/8" NGA515RS

9 7/8" NGA515RS
Product Name : 9 7/8" NGA515RS
Directions

CUTTING STRUCTURE

Chisel on gage, concial on inner rows.
Designed for medium soft formations with low compressive strength, such as shale, soft limestone, interbedded dolomite, coal ore.
Compressive strength: 12,000-18,000 psi/82-124 MPa

 

SHIRTTAIL PROTECTION

Hard welding and wear resistant carbide protection on shirttail lip and lug

 

PRODUCT SPECIFICATION

IADC Code:  515

Bearing Type: Roller-Ball-Roller-Thrust Button / sealed Bearing

Circulation Type: Jet Air

Cutting Structure: 

Inner and Nose Rows: Conical

Gage Rows: Chisel

Gage Bevel Protection: Ovoid

Pin Connection: 6 5/8″ API REG

Metric Bit Diameter: 251 mm

Product Weight: 143 lbs/65 kg

 

OPERATING SUGGESTIONS 

Weight on Bit: 13,500-45,000lb/6.1-22.4T

Rotary Speed: 80-110rpm

Air Back Pressure: 29-58 psi/0.2-0.4 MPa

 

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