MATERIAL (4145 H MOD) – MECHANICAL PROPERTIES as per API 7-1, Latest Edition
Precision machined from one integral piece of AISI 4145 H Mod Q & T bar stock
Interdril fully integral Spiral Heavy Weight Drill Pipes are manufactured from full length bar stock of material specification AISI 4145 H Mod, Quenched & Tempered, API 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 the 18° tapered shoulder of Box Tool Joint and two 3 inches bands on centre spiral 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.
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DIMENSIONAL DATA – RANGE II
           
Nom Size
(A)
Tool Joint OD (E)
Nom ID
(B)
Wall Thickness
Centre Upset OD
(C)
Centre Upset Length (Ft)
Elevator Upset OD
(D)
Connection size and type
Approx Overall Length Pin / Box
Approx Overall Length (Ft)
Approx Weight
Make Up Torque Ft. lbs
Per Foot
Per Joint
30ft
3 1/2
4 3/4
2 1/4
.625
4
18.5
3 5/8
NC 38 (3 1/2 IF)
24 / 30
31.0
26.7
828
  11,500
4
5 1/4
2 9/16
.719
4 1/2
18.5
4 1/8 
4 FH 
24 / 30
 31.0
31.5
 977
 14,600
4 1/2
6 1/4
2 13/16
.844
5
18.5
 4 5/8
NC 46 (4 IF) 
24 / 30
31.0
45.0
1395
 22,500
5
6 1/2
3
1.000
5 1/2
18.5
 5 1/8
NC 50 (4 1/2 IF) 
24 / 30
 31.0
54.0
 1674
30,000 
5 1/2
7
3 1/2
1.000
6
18.5
 5 11/16
 5 1/2 FH
   24 / 30
 31.0
 62.7 
 1944
 37,400
6 5/8
8
4
1.313
7 1/8
18.5
 6 3/4
 6 5/8 FH
   24 / 30
 31.0
77.0 
  2387
  52,700 

* 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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