Bore Piles Hard Rock Drill Roller Cone Bits With API Standard For Core Barrel
IADC | Rock formation | WOB (KN/mm) | PRM(r/min) |
417/427/437 | Low compressive strength, high drill-ability and extremely soft formation, like shale, clay, sandstone, conglomerate etc | 0.35~0.90 | 140~70 |
447 | Low compressive strength, high drill-ability and soft formation, like shale, clay, sandstone, soft limestone, salt rock, plaster etc. | 0.35~1.00 | 140~60 |
517 | Low compressive strength, high drill-ability and soft formation, like shale, clay, sandstone, soft limestone, salt rock, etc | 0.35~1.05 | 120~50 |
527 | Soft formation with low compressive, like Low compressive strength, high drill-ability and soft formation, like shale, clay, sandstone, soft limestone, salt rock, anhydrite etc. | 0.35~1.05 | 120~50 |
537/547 | Low compressive strength, medium hard formation with hard abrasive interlayer, like Hard shale, anhydrite, soft limestone, sandstone, dolomite with mezzanine, etc. | 0.50~1.05 | 110~40 |
| High compressive strength, medium hard and thick hard interlayer, like hard shale, limestone, sandstone, dolomite, etc. | 0.50~1.05 | 80~40 |
Hejian Longyue Drill Bit Manufacturer Co.,Ltd is a manufacturer of Drill Bit with well-equipped testing facilities and strong technical force. With a wide range, good quality, reasonable prices and prompt delivery, our products are extensively used in oil filed, well Drilling, NO Dig filed and other industries. Our products are widely recognized and trusted by users and can meet continuously changing economic and social needs.
We welcome new and old customers from all walks of life to contact us for future business relationships and mutual success!
Q1. Whether accept customized according to customers' requirements ?
A: Yes, We accept customized, no matter how much is the purchase quantity
Q2. Can I expect a quality products?
A: Yes. All our activities are accredited to ISO 9001:2008 and API, both in products
and services, at the same time, mature production technology ensuring the quality
satisfy international request.
Q3. About lead time and shipping time?
A: The lead time depend on quantity of order. Usually shipped by sea, small order
or urgent order we can send you by air after received your agreement.
According the distance from china to your port, usually from China to European
about 25 days. To West of American 20 days.
Q4. What is your trade terms?
A: We offer EXW, FOB, CFR, CIF, DDU.
Q5. What is your payment terms and method?
A: Our payment terms: normally 30% deposit, balance 70% before shipment.
Our payment method, we accept T/T, L/C.
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