311.2mm FA Series Water Well Drill Bits , HDD Drill Bits IADC 517G API-7-1 Standard
Brand Name:FLRT
Certification:API-7-1, ISO 9001:2008
Model Number:12 1/4 FA517G
Minimum Order Quantity:20pcs
Delivery Time:5~45 workdays
Place of Origin:China
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Location:
Beijing Beijing China
Address:
B2-0645 ROOM, CENTURY-TEA-TRADE-CENTER, NO.10 MALIANDAO ROAD, XUANWU DISTRICT, BEIJING, CHINA
Supplier`s last login times:
within 48 hours
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311.2mm , FA Series , IADC 517G , Rock Bit, Water Well Drilling Bit , HDD Drilling
RECOMMENDED DRILLING PARAMETERS FOR APPLICATION
Types & IADC Code | 417 | 437 447 | 517 527 | 537 547 | 617 627 | 637 | |
WOB | KN/mm(Bit Dia.) | 0.4~0.9 | 0.4~0.9 | 0.35~1.0 | 0.5~1.0 | 0.6~1.1 | 0.7~1.2 |
Lb/in. (Bit Dia.) | 2285~5142 | 2285~5142 | 2000~5714 | 2857~5714 | 3428~6285 | 4000~6857 | |
Rotation Speed (Rpm) | 140~60 | 140~60 | 125~50 | 110~50 | 100~40 | 80~40 | |
Teeth and Tungsten Carbide Insert Buttons
- Length and geometry relate the rock strength
- Size of the cone and bearing structure affect the teeth
- Teeth design criteria are:
- Spacing and interfitting of teeth governed by tooth strength,
depth and included angle
- Shape and length, dictated by formation characteristics
- Types of teeth, milled or inserted
- Log slider and widely spaced teeth used for soft rock
- Long teeth allow results in breaking greater volume
- Wide spacing allows easy removal of drilled cuttings
- The included angle for soft rock from 39 to 42
- Medium hard would have a moderate number of teeth and 43 to 45 included angle
- Hard rocks need 45 to 50 included angle
- Milled teeth are faced with hardening metal to reduce wear
- Milled tooth bits are suitable for soft formation
- Insert are used for hard formation
- There are several types of insert to suit the hardness
- Chisel-shaped for soft rock
- Round or spherical for medium and hard rocks
311.2mm FA Series Water Well Drill Bits , HDD Drill Bits IADC 517G API-7-1 Standard
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