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 You are here  >> All Pictures >> Drilling Rig Components and Accessories >> Drawworks
Drawworks

Features  of  Mechanical  Drawworks
• All  bearings  are  roller  bearings.    Shafts  are  made  of  alloy  steel.
• Chain  drive  transmits  with  high  accuracy  and  high  strength  and  has  forced  lubrication.
• The  drum  is  grooved.    Ventilating  air  clutches  constitute  the  high  and  low  speed  ends.
• The  brake  drum  (brake  disc)  is  cooled  with  circulating  water.
• Main  brake  is  band  brake  or  disk  brake,  the  auxiliary  brake  is  eddy  current  brake  (water-cooled  or  air-cooled.)
• The  surface  is  hardened  with  middle  frequency  induction,  and  is  very  durable  for  long  life.
• The  sprocket  tooth  profile  is  hardened  with  middle  frequency  induction.    Involute  serration  tooth  clutch  works  as  a  shifting  clutch.

Spec.  of  Mechanical  Drawworks

Model

JC40

JC50

JC70

Nominal  drilling  depth 
m

Ф114mm(41/2  in)  DP

2500-4000

3500-5000

4500-7000

Ф127mm(5  in)  DP

2000-3200

2800-4500

4000-6000

Rated  power  kW(hp)

735  (1000)

1100  (1500)

1470  (2000)

Max.  fastline  pull  kN

275

340

485

Dia.  of  wineline  mm(in)

32  (1  1/4  )

35  (1  3/8  )

38  (1  1/2)

Drun  size(D×L)  mm(in)

640  ×1235
(25  1/4  ×48  1/2)

685×1245
(27  ×49  )

770×1436
(30  ×56  1/2  )

Brake  drum  size(D  ×W)  mm(in)

1168×265
(46  ×10  1/2  )

1270×267
(50  ×10  1/2  )

1370×267
(54  ×10  1/2  )

Brake  disc(D×W)  mm(in)

1500×76
(59  ×3)

1600×76
(63  ×3  )

1600×76
(63  ×3  )

Sand  drum  size(D  ×L) 
mm(in)

356×1245
(14×49  )

356×1430
(14  ×56  1/4  )

356×1430
(14  ×56  1/4  )

Sand  drum  capacity(Ф14.5  wireline)  m(ft)

3500  (11480  )

4500  (14760  )

6000  (19685  )

Auxiliary  brake

DS40

DS50

DS70

Dimension(L×W×H)  mm

6450×2560×2482

7000×2955×2780

7930×3194×2930

Weight  kg

28240

45210

43000

 DC  Drawworks

Features  of  DC  Drawworks
• All  bearings  are  roller  bearings.    Shafts  are  made  of  alloy  steel.
• The  drum  is  grooved.    Ventilating  air  clutches  constitute  the  high  and  low  speed  ends.
• The  brake  is  hydraulic  disc  brake  and  is  water-cooled  or  wind-cooled,
• The  auxiliary  brake  is  eddy  water-cooled  or  wind-cooled  current  brake.
• Shifting  is  through  the  air  clutch.
• Chain    transmission  structure.
• Chains  are  lubricated  by  thin  oil,  bearings  are  lubricated  by  grease.
• Split  construction.

Spec.  of  DC  Drawworks

Model

JC40D

JC50D

JC70D

JC90D

Nominal  drilling  depth
m

Ф114mm(41/2  in)  DP

2500-4000

3500-5000

4500-7000

6000-9000

Ф127mm(5  in)  DP

2000-3200

2800-4500

4000-6000

5000-8000

Rated  power  kW  (hp)

735  (1000  )

1100  (1500  )

1470  (2000  )

2210  (3000  )

Qty.  of  motor  ×rated  power  kW  (hp)

2  ×438(537)/
1  ×800(1072)

2  ×800(1072)

2  ×800(1072)

3  ×800(1072)

Rated  speed  of  motor  r/min

880/970

970

970

970

Dia.  of  wireline  mm  (in)

32  (1  1/2  )

35  (1  3/8  )

38  (1  1/2  )

45  (1  3/4  )

Max.  fastline  pull  kN

275

340

485

630

Main  drum  size  (D×L)  mm  (in)

640×1139
(25  1/4  ×44  7/8  )

685×1138
(27  ×44  7/8  )

770×1361
(30  ×53  1/2)

914×1556
(36  ×61  1/4)

Brake  disc  size  (D×W)  mm  (in)

1500×40
(59  ×1  1/2  )

1600×76
(63  ×3  )

1600×76
(63  ×3)

1600×76
(63  ×3  )

Sand  drum  size(D×L)  mm  (in)

356×1245
(14  ×49  )

356×1245
(14×49  )

356×1245
(14  ×49  )

356×1448
(14  ×57  )

Sand  drum  capacity  (Ф14.5  wireline)  m  (in)

4000  (13120  )

5000  (16400  )

6400  (21000  )

7500  (24600  )

Auxiliary  brake

DS40

DS50

DS70

DS90

Dimension(L×W×H)  mm

6600×3716×2990

6800×4537×2998

7670×4585×3197

7874×5486×2997

Weight  kg

40000

48000

61000

70000

 AC-VFD  Drawworks

Features  of  AC-VF  Drawworks
• All  bearings  are  roller  bearings  with  shafts  made  of  alloy  steel
• Grooved  drum 
• Automatic  driller 
• Main  brake  is  water-cooled  or  wind-cooled,
• hydraulic  disc  brake 
• Auxiliary  brake  is  dynamic  brake 
• Single  shaft  construction 
• Transmitted  through  two-stage  gear  reducer  with  manual  shift 
• Gears  lubricated  by  thin  oil

Spec.  of  AC-VFD  Drawworks

Model

JC40DB

JC50DB

JC70DB

JC90DB

Nominal  drilling  depth 
m

Ф114mm(41/2  in)  DP

2500-4000

3500-5000

4500-7000

6000-9000

Ф127mm  (5  in)  DP

2000-3200

2800-4500

4000-6000

5000-8000

Rated  power  kW  (hp)

735  (1000  )

1100  (1500  )

1470  (2000  )

2210  (3000  )

Qty.  of  motor  ×rated  power  kW  (hp)

1  ×720

2  ×720

2  ×1100

3  ×1100

Rated  speed  of  motor  r/min

601

660

660

660

Dia.  of  wireline  mm  (in)

32  (1  1/4  )

35  (1  3/8  )

38  (1  1/2  )

45  (1  3/4  )

Max.  fastline  pull  kN

275

340

485

630

Main  drum  size  (D×L)  mm  (in)

640×1139
(25  1/4  ×44  7/8  )

685×1138
(27  ×44  7/8  )

770×1439
(30  ×53  1/2  )

914×1556
(36  ×61  1/4  )

Brake  disc  size  (D×W)  mm  (in)

1500×76
(59  ×3)

1600×76 
(63×3)

1520×76
(59  3/4)

1800×76
(70  7/8  ×3)

Power  of  automatic  feeding  motor 
kW  (hp)

45(60)

45(60)

45(60)

45(60)

Dimension  (L×W×H)  mm

4230×3000×2630

5500×3100×2650

4570×3240×2700

6000×3400×2906

Weight  kg

18600

22500

30000

42000


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