8 1/2'' 3 Wing 4 Wing 5 Wing Step Drag Bit Well Drilling Tools

 step drag bits

Drag bit are manufactured from forged high-quality alloy steel and hard alloy, plus state of art welding technology and multiple precision heat treatment to provide the highest penetration rate and longest lifespan at the roughest condition.

A drag bit is usually designed for soft formations such as sand, clay or some soft rock. However, they will not work well in coarse gravel or hard rock formations. Uses include drilling water wells, mining, geothermal, environmental and exploration drilling. Whenever possible, they should be used to drill pilot holes because they produce cuttings that are easiest to log.

Three-wing bits tend to drill faster, whereas four-wing bits are longer-lasting, more durable, and drill a straighter hole

  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''