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Tricone Roller bits 7 7/8 inch 8.1/2 inch for hard formation hole drilling usage
  • Tricone Roller bits 7 7/8 inch 8.1/2 inch for hard formation hole drilling usage
  • Tricone Roller bits 7 7/8 inch 8.1/2 inch for hard formation hole drilling usage
  • Tricone Roller bits 7 7/8 inch 8.1/2 inch for hard formation hole drilling usage

Tricone Roller bits 7 7/8 inch 8.1/2 inch for hard formation hole drilling usage

Place of Origin Germany
Brand Name ROSCHEN
Certification ISO
Model Number 7 7/8" 8 1/2"
Product Details
Tungsten Carbide
Tricone Roller Bits
Oil, Gas, Well Drilling
Mill Tooth Bit Tricone Bits
IADC Code:
International Standard
High Quality And Best Service
High Light: 

milled tooth drill bit


tricone rock roller bit

Payment & Shipping Terms
Minimum Order Quantity
1-5 pcs
Packaging Details
Poly wooden box
Supply Ability
1000 pcs
Product Description

Tricone Roller bits 7 7/8 inch 8.1/2 inch for hard formation hole drilling usage


Size(inch) Size(mm) IADC Code Nozzle QTY Connection Rotary Speed(rpm) WOB(Kn)
8 1/2 215.9 IADC 617 3 4 1/2 REG 50~200 0.45~1.1


Product Application:

Suitable for medium hard ofrmation with high compress strength, such as hard shale, limestone, sandstone, dolomite, etc.


1. Tricone bit with high strength toughness of cemented carbide tooth, improves the shock resistance of the reduction gear and reduces rate of gear broken.
2. To Optimize the design of tooth row number ,the teeth number ,the height and the unique configuration of cemented carbide tooth. Give full play to the drill cutting ability and cutting speed.
3. The surface of the shirttail is welded by wear-resistant hardfacing material, improves wear resistance and bit life.


Our Service:

1. 24 hour uninterrupted serviece,answer your questions in a timely manner
2. Warm welcome guests to visit
3. One of the largest manufacturer and supplier in Asia.High technology,high quality
4. Flexible production
5. sincerely cooperate with you
6. Service to customer satisfaction

Company Introduction:

Roschen engaged in diamond drill bit and drilling tool research and development, design and manufacture, sales and service of specialized companies.

The company has a number of experts experienced in diamond bit design of drilling technology, and is equipped with 5-axis machining center, NC lathes, NC sintering furnace, Ring sewing machine and other advanced production equipment. We are using domestic and foreign advanced professional design software,and doing continuous technological innovation and sustainable development. Ruishi owns full production lines of PDC bit and core bit, which is covering all sizesofthe 2" to 26" bit.

Roschen has been promoting the comprehensive quality management and focus on the customer's demand. In order to ensure the stability of quality and the excellent performance of the bit, we strictly comply with the ISO9001 quality management system and ISO14001 environmental management system and OHSAS18001 Occupational health and safety management system in the enterprise operation, and strictlyimplement API Spec7-1 quality management standards in the process of production.

As the first grade supplier for Sinopec, CNPC and CNOOC, Roschen's products are widely used in the Tarim,Tuha,Changqing, Dagang, Sichuan, Zhongyuan, Jidong, Huabei and other major oil fields. Roschen has also established long-term strategic partnership with these oil fields. We have been highly recognized by the stability of excellent product quality and timely and thoughtful service. The company’s products have been widely exported to North America, the Middle East, Russia and other countries and regions.

"Excellent Quality, Honest and Faithful,Innovation and Improvement,Satisfied Service". Roschen is willing to cooperate with customers honestly and obtain the result of mutual win.



Q: Are you a manufacturer or trading company?
A: We are a specialized manufacturer.

Q: What are your main products, and used for?
A: Our products include core bit, PDC bit, reaming shell, core barrel, casing, drill rod, SPT equipment, Shelby sampler, drill rig and other drilling parts.
They are used for mineral exploration, geological drilling, geotechnical engineering and soil sampling.

Q: How about the delivery terms?
A: 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. We have obtained certificate of ISO9001:2000 in 2004.


For more information please contact:


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WeChat: +86-137 6419 5009 ; +86-135 8585 5390
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