Api Quality Tricone Rock Bit China Supplier - Chinaprice: contact company for price
First Digit- 1, 2, 3 designate steel tooth bits and the formation being drilled, with 1 for soft, 2 for medium, and 3 for hard formations. 4, 5, 6, 7, and 8 designate tungsten carbide insert bits and the formation being drilled, with 4 being the softest and 8 the hardest formation.
Second Digit- 1, 2, 3 and 4 are further broken down by the formation, with 1 being the softest and 4 the hardest.
Third Digit- Classifies the bit according to bearing/ seal type and special gauge/ wear protection.
Open Bearing- On these bits the cones will spin freely. The bit has a front row of ball bearings and a back row of roller bearings.
2. Opening Bearing, Air- Cooled- Cones are similar to# 1. but have air injection directly to the cones to cool the bearings. Air flows into the cone through the passage ways inside the pin. ( Not for use in mud applications. )
3. Open Bearing with Gauge Protection- Carbide inserts in the heel of the cone.
- Posted By: Hejian Deris Petroleum Drilling Equipment
- Phone: 8618831737902
- Address: china hebei, hejian, China
- Website: http://hjdrs.en.alibaba.com
Published date: June 1, 2014 -
- Business Description: Company Competitive Power:
1.the most professional and experienced senior engineers in this field
guarantee high quality products.
2.MANUFACTURER position ensures competitive price.
3.Sincere salesmen are our business basis.
4.Different sizes and dimensions are available
5. A certain number of bulk stock ensures fast delivery
6. Best after sales service Welcome to inquiry and visit our factory
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