API Standard 4 Wings Step Security Drill Bits for Big Diameter / Water Well Drilling
| Place of Origin: | Hebei |
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Company Profile
| Location: | Beijing, China (Mainland) |
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| Business Type: | Manufacturer |
| Main Products: | Water Well Drilling Rig, DTH Drilling Rig, Anchor Drilling Rig |
Product Detail
| Model No.: | 64~445mm |
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Product Description
API Standard 4 Wings Step Security Drill Bits for Big Diameter / Water Well Drilling
Introduction
4 wings step drag bits are one piece construction of alloy steel cast with tungsten carbide cutting tips and gauge sides to ensure longer life. It has4 wings and 4 flushing holes. 4 wings step drag bits, are more durable and lasting than 3 wings step drag bits, because of cutting structure, but will penetrate more slowly. 4 wing step drag bits are more stable and tend toward drilling a straighter hole, as its 4 wings have more stable structure and do not make a deviation in the drilling.
4 wings step drag bits are economical tools when drilling softer geological formations and shallower depths, they are primarilydesigned for soft tomedium formations, such as Clay, Loam, Silt ,Mostsoft-to-medium soilsthat have some moisture, etc. And also step drag bits are recommended for drilling in Mining, Exploration, Environmental, Water well, Geo Exchange, etc.
The diameter and thread showed as above are usual size, other sizes are available upon request.
Thread size: 2 3/8'' API Reg, 2 7/8'' API Reg, 3 1/2'' API Reg, 4 1/2'' API Reg, 6 5/8'' API Reg, 2'' API IF, 2 3/8'' API IF, 2 7/8'' API IF, A Rod, N Rod, AW, BW, NW, AWJ, BWJ, NWJ.
Drag bits features:
1. A solid one piece heat treated, 4140 alloy steel body for bit strength & durability;
2. CNC threaded machining for proper installation &use;
3. Forgings are milled to better seat the carbide inserts.
4. Select tungsten carbide inserts 5.5mm thick are standard.
5. Relief is hand ground behind carbide inserts for maximum performance.
Specification
| No. | Bit Diameter | Bit Design | Type | Part No |
| inch | mm | Step / Chevron | ||
| 1 | 2 1/2 | 64 | S/C | DB212S/DB212C |
| 2 | 2 3/4 | 70 | S/C | DB234S/DB234C |
| 3 | 2 15/16 | 75 | S/C | DB21516S/DB21516C |
| 4 | 3 | 76 | S/C | DB3S/DB3C |
| 5 | 3 1/8 | 79 | S/C | DB318S/DB318C |
| 6 | 3 1/4 | 83 | S/C | DB314S/DB314C |
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