7 1/2'' Blade Step Drag Bit for Soft Drilling Water Well Drill Tool

 step drag bits

  Three 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 has 3 wings and 3 flushing holes. Compared with 4 wings, 3 wings step drag bits tend to drill faster and aggressive, whereas, are shorter lasting and less durable.3 wings step style drag bits will produce larger cuttings force than chevron style drag bit. Rotary table speed ofstep drag bits should be between 60 and 80 rpm with light weight on bit (WOB).

Three 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.

  Note: 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 Bit 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.

Regular Models

14 3/4'' 117

14 3/4'' 537

12 1/4 ''537

10 5/8'' 537

22''517

    8 3/4'' 617

15 1/2'' 517

9 5/8'' 737

12 1/4'' 537

6 1/2'' 537

8 1/2'' 517

108mm 437

6 1/2'' 217

12 1/4''637

6'' 517

PDC 6 1/4''

PDC 4 3/4''

Drag bit 12''

8 1/2'' single cone

8 1/2'' single cone

Hole Opener 18''

Hole Opener 12''

8 1/2'' single cone

Stabilizer

Reamer 17 1/2''