1. Short parabolic crown profile, medium cutter density.
2. Interchangeable screw nozzle.
3. Structured diamond/carbide interface. Cutter delays the onset of Fracturing and cutter wear.
4. Under-cut shank maximizes junk slot area for better bit cleaning. Hign filt nozzles for
Improved hydraulics and Rop.
5. Can be used on rotary or down hole motor.
6. Surfable for soft to medium formation.
FAQ:1,How to order the product?
Send the inquiry with detail item description or model number.If there is no packing demand we take it as sea-way packing.
2,About lead time ?
The lead time depend on the quantity of the order. the more,the better,cause large batch is reduce the time and the cost.
3,Can I expect good quality product?
Yes,all our activities are accredited to ISO9001:2008,both in products and services.
Specification:
According to the stratigraphic lithologic data, hydraulic and drilling parameters, choose the type of drill bit.According to the hydraulic parameters, choose corresponding nozzle .nozzle hole size difference should not be too large, so as to avoid erosion channel.Before drill down, check the drill bit size, type size is consistent with the well, the nozzle is installed, connected with the drill bit screw thread specification and the joint compliance.The drill bit should be under well as the operation rules.bit and bottom contact, It must operate 30 minutes under light pressure and slow turning (drilling pressure 5-15kN, speed 60r/min) , then can be gradually increased to the normal drilling pressure.The bottom must be clean, various types of drill do not reaming, slow decentralization, prohibited the pier drilling.Drilling operation must be stable, if have abnormal phenomenon ,such as bit bouncing ,should be timely analysis and take effective measures.The drill bit should be stored at a temperature of 10-30ºC indoor, keep dry, ventilation, to prevent the sun and rain.
| IADC |
WOB(KN/mm) |
RPM(r/min) |
Applicable Formations |
| 417/427 |
0.3-0.9 |
150-70 |
very Soft formation with low compressive strength and high drillability,such as clay,soft mudstone,shale,salt,loose sands,etc. |
| 437/447 |
0.35-0.9 |
150-70 |
very Soft formation with low compressive strength and high drillability,such as clay,soft mudstone,shale,salt,loose sands,etc. |
| 515/525 |
0.35-0.9 |
180-60 |
very Soft formation with low compressive strength and high drillability,such as mudstone,salt,soft limestone, sands,etc. |
| 517/527 |
0.35-1.0 |
140-50 |
Soft formation with low compressive strength and high drillability,such as mudstone,salt,soft limestone,sands,etc |
| 535/545 |
0.35-1.0 |
150-60 |
medium soft with harder formation, more abrasive streaks,such as hard shale,mudstone,soft limestone,etc. |
| 537/547 |
0.4-1.0 |
120-40 |
medium soft with harder formation, more abrasive streaks,such as hard shale,mudstone,soft limestone,etc. |
| 617/627 |
0.45-1.1 |
90-50 |
medium hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc. |
| 637 |
0.5-1.2 |
80-40 |
hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc. |
| 737 |
0.7-1.2 |
70-40 |
Hard with high abrasiveness such as hard limestone,dolomite,firm sands,etc |
| 827/837 |
0.7-1.2 |
70-40 |
very hard with high abrasiveness,such as quartzite,quaruzite sand,chert,basalt,granite,etc. |
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