MATERIAL (4145 H MOD) – MECHANICAL PROPERTIES as per API SPEC.7-1, Latest Edition
Precision machined from one integral piece of AISI 4145 H MOD Q & T bar stock.
Interdril fully integral Heavy Weight Drill Pipe are manufactured from full length bar stock of material specification AISI 4145 H Mod, Quenched & Tempered, API SPEC 7-1 (latest edition) specification requirement.
HARDBANDING :
To optimize wear resistance, hardbanding is applied on tool joint and centre upset. This heavy duty hard metal application is a closely controlled welding process applied with an hardbanding machine. Hardbanding is applied 4 inches on the Box Tool Joint , 4 inches on the pin tool joint, and two 3 inches bands on centre upset as per Standard Hardbanding Practices (Varies as per customer requirements). Hardbanding types available are Tungsten Carbide, ARNCO 100 XT, 200XT, 300XT, SMOOTH X, ARMACOR M, TCS Titanium.
CONNECTION FEATURES:
API Stress Relief Groove on Pin and Bore Back Relief features on boxes are standard on the 3½ inch to 6 5/8 inch Heavyweight. All connections are phosphated, applied with API dope and provided with thread protectors. Thread roots are cold rolled on all sizes applicable.

 
   
  
                              DIMENSIONAL DATA – RANGE II
Nom Size
(A)
Tool Joint OD (E)
Nom ID
(B)
Wall Thickness
Centre Upset OD (C)
Elevator Upset OD
(D)
Connection size and type
Approx Weight
Make Up Torque* Ft/lbs
Per Foot
Per Joint
31ft
3 1/2
4 3/4
4 7/8
5
2 1/4
2 1/16
.625
.719
4
3 5/8
3 5/8
3 7/8
NC 38 (3 1/2 IF)
25.3
25.7
784
798
11500
13700
14400
4
5 1/4
2 1/2
2 9/16
.750
.719
4 1/2
4 1/8
4 3/16 
NC 38 (4 FH)
28.0
30.0
868
930
 15100
14600
4 1/2
6 1/4
2 11/16
2 3/4
2 13/16
.906
.875
844
5
 4 11/16
4 5/8
NC 46 (4 IF) 
41.5
41.0
1,287
1,271
 23500
22500
5
6 1/2
6 5/8
3
1.000
5 1/2
 5 1/8
NC 50 (4 1/2 IF) 

49.3
50.4 
1,528
1,562
 30000
5 1/2
7
7 1/4
7 1/2
3 1/4
3 3/8
3 7/8
4
1.125
1.06
.812
.750
6
 5 11/16
 5 1/2 FH
 57.0-
  62.0   
1,700-
1900
 29200-37700
6 5/8
8
8 1/4
8 1/2
4
4 1/2
5
1.312
1.06
.813
7 1/8
 6 3/4
 6 5/8 FH
 71.5  
2,217 
 38400-52700









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* MUT values calculated assuming min yield stregth of material 1,20,000 psi



Hardbanding Type: Tungsten Carbide, Arnco 100XT, 200XT, 300XT, SMOOTH X, ARMACOR M, TCS Titanium





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