Model  

Drill collar Diameter

(mm)   

 Sleeve

Body

Thread type of two endings 

Length

(mm)

Working O.D  

Upset

End

O.D.  

Upset

End

Length

(mm)  

Fishing

Neck

Length

(mm)

I.D

(mm)

Make-up

Torque

(KN.m)  

Total length

 (mm)

String type   

Near bit  

Near bit  

String   

Top  

Down  

Top  

Down  

WH216

165.1

480

214

190

200

600

71

6.95-

7.25

1800-1900

1800-1900

4 1/2

IF

4 1/2IF

4 1/2IF

4 1/2REG

WH210

470

210

WH203

472

203

WH197

455

197

WH311

203.2

555

310

238

76

9.7-11

1800-2000

1800-2000

6 5/8REG

6 5/8REG

6 5/8REG

6 5/8REG

WH305

550

305

WH292

540

292

WH279

530

279

WH445

228.6

682

444

279

13.85-16.55

7 5/8

REG

7 5/8

REG

7 5/8

REG

7 5/8

REG

WH432

676

432

WH419

670

420

WH406

644

407

WH559

2000-2200

2000-2200

WH610

WH660