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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7 7/8" NGA545R

7 7/8" NGA545R
Product Name : 7 7/8" NGA545R
Directions

CUTTING STRUCTURE

Conical on gage and inner rows.
Designed for soft formations with low compressive strength, such as shale, soft limestone, interbedded dolomite, coal ore.
Compressive strength: 18,000-27,000 psi/124-186 MPa

 

SHIRTTAIL PROTECTION

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

 

PRODUCT SPECIFICATION

IADC Code:  545

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

Circulation Type: Jet Air

Cutting Structure: 

Inner and Nose Rows: Concial

Gage Rows: Concial

Gage Bevel Protection: Ovoid

Pin Connection: 4 1/2″ API REG

Metric Bit Diameter: 200 mm

Product Weight: 75 lbs/34 kg

 

OPERATING SUGGESTIONS 

Weight on Bit: 15,750-39,380lb/7.2-17.9T

Rotary Speed: 80-110rpm

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

 

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