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Stabilizers

SFMC Stabilizers are made from premium chrome molybdenese alloy steel (except for non-magnetic style), heat treated by special procedure and obtain expected hardness, strength and impact value properties. all threads are made strictly in accordance with API specification. the hardbanding of stabilizers employ  "pressed in" Tungsten Carbide alloy buttons or other anti-wear materials. All stabilizers should be ultrasonic tested.

5Integral spiral Stabilizer

SFMC Integral Spiral Stabilizers are made from AISI 4145H Modified alloy steel or Non-magnetic alloy steel, the pressed button type or applied Tungsten Carbide hardbanding on the blade facing are available. the Non-magnetic stabilizers have special hardbanding on the spiralled blade surface that the magnetic properties has been eliminated. 

Manufacturing Standard: SY 5051-91
Standard Sizes and Styles for Stabilizers

OD
D1
mm

D2
mm

L2
mm

d
mm

L±20mm

Short Type

Long Type

String style

Near-bit style

String style

Near-bit style

L3=150

L1=350

L3=300

L1=700

152.4~165.1

121

400
500

51

950
1050

1100
1200

1450
1550

1650
1750

 190.5~200

159;178

57;71

212.7~222.2

159;178

400
500
600

57;71

950
1050
1150

1100
1200
1300

1450
1550
1650

1650
1750
1850

241.3~250.8

178

71

311.1

203;229

500
600
700

76

1150
1250
1350

1300
1400
1500

1750
1850
1950

1950
2050
2150

444.5

203;229

500
600
700

76

1350
1450
1550

1500
1600
1700

1950
2050
2150

2150
2250
2350

660.4

229

700
800
900

76

1950
2050
2150

2100
2200
2300

2550
2650
2750

2750
2850
2950

The Non-magnetic Integral Spiral Stabilizer would be made in accordance with above table, or as per specified by user

Mechanical properties of stabilizers

OD at
Two Ends(in)

Tensile Strength
σb
MPa

Yield Strength
σs
MPa

Elongation
δ3%

Reduction of area
Ф
%

Impact
Ak
J

4 3/4~6 1/4

≥965

≥758

≥13

40

≥54

7~9

≥931

≥689

≥13

40

≥54

sleeve stabilizer
5The SFMC sleeve stabilizer consists of body and sleeve which is jointed; the sleeve can be changed after fretted. The material of body is 4145H modified alloy steel. After heat treated, its Brinell hardness can reach to 285-341 and the impact value is more than 54 Joules.
Sleeve stabilizers standard sizes


Hole Size Range (in)

DC Diameter B (in)

Upset Diameter A (in)

Bottom Neck Dia C (in)

Overall Length L (in)

Fishing Neck Length L1

Weight(kg)

Sleeve Length L3 (in)

String style

Near-bit Style

6 1/4~7 1/2

4 3/4~5

5 3/4

4 3/4

65

27

22

125

14

8 1/2~9 7/8

6 1/4~6 3/4

7 1/2

6 1/4

65

27

22

220

14

8 1/2~9 7/8

3 1/2~7 1/4

7 3/4

6 1/2

65

27

22

260

14

12 1/4~17 1/2

7 3/4~8 1/4

9 1/4

7 3/4

66

27

22

370

16

12 1/4~17 1/2

8 1/2~9

9 7/8

8 1/2

66

27

22

460

18

14 3/4~20

9 1/2~10

11

9 5/8

66

27

22

550

22

Interchangeable sleeve stabilizers

SFMC interchangeable sleeve stabilizers are made of 4145H alloy steel.Heat treated to 285-341 Brinell Hardness and 54 Joules minimum impact value. All physical properties would be guaranteed 1" down the surface. The kind of stabilizer is constructed of two pieces, which are jointed, by the center connection and one sleeve. Every stabilizer is equipped with a certain size of sleeve. 

 Interchangeable Sleeve stabilizers standard sizes

5

OD
D1
mm

D2
mm

L2±5mm

d
mm

L1±10mm

L±20mm

Bit Diameter
(in)

190.5

159

400
500

57

750

1900
2000

7 1/2

200

7 7/8

212.7

159
178

400
500
600

57
71

750

1900

8 3/8

215.9

2000

8 1/2

222.2

2100

8 3/4

241.3

178

400
500
600

71

750

1900

9 1/2

244.5

2000

9 5/8

250.8

2100

9 7/8

311.1

203
229

500
600
700

76

750

2100
2200
2300

12 1/4

444.5

2300
2400
2500

17 1/2

Integral straight rib stabilizer

SFMC straight rib stabilizers are made of AISI 4145H alloy steel by one piece of integral bar. every stabilizer has four straight ribs that pressed Tungsten Carbide buttons or other type of hardfacing are located on the surface of the ribs. Ultrasonic inspection is performed on each stabilizer.

5
Integral straight rib stabilizers standard sizes

OD
D1
mm

D2
mm

L2
mm

d
mm

L  20mm

Short Type

Long Type

String Style

Near-bit Style

String Style

Near-bit Style

L3=150

L1=350

L3=300

L1=700

152.4~165.1

121

400
500

51

950
1050

1100
1200

1450
1550

1650
1750

190.5~200

159;178

57;71

212.7~222.2

159;178

400
500
600

57;71

950
1050
1150

1100
1200
1300

1450
1550
1650

1650
1750
1850

241.3~250.8

178

71

311.1

203;229

500
600
700

76

1150
1250
1350

1300
1400
1500

1750
1850
1950

1950
2050
2150

444.5

203;229

500
600
700

76

1350
1450
1550

1500
1600
1700

1950
2050
2150

2150
2250
2350

660.4

229

700
800
900

76

1950
2050
2150

2100
2200
2300

2550
2650
2750

2750
2850
2950

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