17 1/2\" oil drilling rig PDC drill bit, diamond core drill bit, 6 blades

Basical ParameterBit Type17-1/2" Number of Blade6Primary Cutter SizeØ19MM ; Ø13MMCutter Qty/TypeØ19*55 ; Ø13*49Gauge Length90Connection7-5/8" API REG N.W./G.W.(KG)180/230Nozzle Size(inch)16/32;18/32Recommended Diamond and PDC Bit Make-up TorqueSize of BitSize&style API Rot

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Basical Parameter17 1/2
Bit Type17-1/2" 
Number of Blade6
Primary Cutter SizeØ19MM ; Ø13MM
Cutter Qty/TypeØ19*55 ; Ø13*49
Gauge Length90
Connection7-5/8" API REG 
Nozzle Size(inch)16/32;18/32
Recommended Diamond and PDC Bit Make-up Torque
Size of BitSize&style API Rotary connectionRecommended torque
3-11/16"~4-1/2"2-3/8" Reg2.4~2.73.3~3.6
4-17/32"~5"2-7/8" Reg4.7~5.16.3~6.9
5-1/32"~7-3/8"3-1/2" Reg7.7~8.410.4~11.4


PDC Drill Bits are equipped with Hardened Alloy Steel base material;High performance PDC-Cutters;Carbide and Diamond gauge protection;Carbide/Diamond Shock Studs;Threaded or Plain Carbide Nozzles for Flushing 

Above features are subject to changes and modifications according to customers' requirements.   

The Diamond PDC drill bit designed to run at high penetration rates even in applications that call for higher blade and cutter counts. Its unique cutting structure layout adds another dimension to bit stability and smooth running by combining the penetration rate potential of traditional "single set" cutter layouts with the life extending features of a "plural set" cutter layout. The result is a bit that runs up to 20 percent faster than conventional PDC bits with minimum bit wear.  

Diamond bits work across an extended range of weight on bit, penetrating quickly even at low bit weights in softer rock. When formations firm up, the bits can take added weight with a smooth torque response and maintain higher than competitive rates of penetration. The technology is a departure from traditional plural set bits that require higher weights to drill even in soft rock, and are generally durable, but slow, even in harder rock. Traditional plural set bits also can produce an erratic torque response when taking additional weight.  

17 1/2

17 1/2
17 1/2

17 1/2

Website: http://roschen.en.made-in-china.com 




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A: We are a specialized manufacturer.

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1. Payment: T/T, L/C, Western Union, Paypal, 30% deposit in advance and rest before delivery.
2. Min. order quantity: 1 piece.
3. Transportation: By DHL/TNT/Fedex express, air, sea, train.

Q: How about discount?
A: Price is based on products and order quantity.

Q: Do you accept sample order?
A: Yes sure, please contact us for details.

Q: How about your after-sales service?
A: As a manufacturer, we offer promt technology support for all problems and questions. Besides, we accept goods return or replace for quality problem.

Q: How does your company control the quality?
A: Quality first. In order to guarantee high quality for our products, Roschen always makes a serious inspection for all products and raw materials in strict procedure. 

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