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Hole stabilizers

In rotary drilling with rock bits or down-the-hole percussion hammers, it is of great importance that a good stabilization be guaranteed. Stabilization assures that the rock bits or hammer will rotate about their own center thus causing energies and forces exerted on it to be most efficiently utilized in an axial direction. Hole stabilizers strategically positioned along the drill string, are employed for this specific purpose, center the drill collars in the hole and provide a better alignment.

CONSTRUCTIVE CHARACTERISTICS

  • The body and blades are made in AISI 4145H alloy steel with treatment over 285 - 345 Brinnel hardness.
  • The right-lay spiral blades are welded to the body after oven pre-heating. These stabilize the drill string to the center of the hole over 360°.
  • All blades are hardfaced with tungsten carbide such as TECNOWIRE (HF 1000).

 



Spiral welded blades stabilizers
Hole size 9 7/8"



Integral sleeve stabilizer
Hole size 16"



Straight welded blades stabilizer
Hole size 28"


STANDARD SIZES

A - Hole O.D.

B - Body O.D.

C - Blade L.

D - Overall L.

E - Hole

F - API Connection

5 7/8" - 6"

4 1/4" - 4 3/4"

12"

40"

2 13/16"

3 1/2" A.R.
3 1/2" IF

7 7/8" - 8 1/2"

6" - 6 1/2"

14"

40" - 48"

2 13/16"

4 1/2" A.R.
3 1/2" IF

9 7/8" - 11"

8"

16"

71"

2 13/16"

4 1/2" IF
6 5/8" A.R.

12 1/4" - 14 3/4"

8"

16"

71"

2 13/16"

6 5/8" A.R.

17 1/2"

8" - 9"

18"

74"

2 13/16"

7 5/8" A.R.

20" - 26"

9" - 9 1/2"

20"

84"

2 13/16"

7 5/8" A.R.

 

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