|
|
 |
| |
 Drill Collar |
|
DRILL COLLAR
The Drill Collar is made of AISI 4145H or 4145 H modified Alloy Steel. Its bores are trepanned from one direction with no mismatch. All Drill Collars are Q & T overall length to ensure the hardness within 285 and 341 BHN with one inch below the surface.
The Physical Properties
|
OD (in)
|
Tensile Strength (Mpa)
|
Yield Strength (Mpa)
|
Elongation (L=4D) (%)
|
Impact AKV (J)
|
Brinell Hardness (HB)
|
|
3 1/8~6 3/4
|
Not less than 965
|
not Less than 758
|
Not less than 13
|
Not less than 54
|
Not less than 285
|
|
7~10
|
Not less than 930
|
Not less than 689
|
Not less than 13
|
Not less than 54
|
Not less than 285
|
|
|
Size OD (in)
|
Bore ID (in)
|
Connection
|
Approx Weight (kg)
|
|
30 ft
|
31 ft
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
5 3/4
|
2 1/4
|
4FH
|
1009
|
1043
|
|
6
|
2 1/4
|
NC44
|
1114
|
1151
|
|
6 1/4
|
2 1/4
|
4IF
|
1224
|
1265
|
|
6 1/2
|
2 1/4
|
4IF
|
1340
|
1385
|
|
6 3/4
|
2 1/4
|
4IF
|
1024
|
1058
|
|
7
|
2 13/16
|
4 1/2IF
|
1481
|
1530
|
|
7 1/4
|
2 13/16
|
4 1/2IF
|
1607
|
1661
|
|
7 1/2
|
2 13/16
|
4 1/2IF
|
1741
|
1799
|
|
7 3/4
|
2 13/16
|
6 5/8Reg
|
1877
|
1940
|
|
8
|
2 13/16
|
6 5/8 Reg
|
2018
|
2085
|
|
8 1/4
|
2 13/16
|
6 5/8 Reg
|
2168
|
2240
|
|
8 1/2
|
2 13/16
|
6 5/8 Reg
|
2315
|
2392
|
|
8 3/4
|
2 13/16
|
6 5/8 Reg
|
2473
|
2555
|
|
9
|
3
|
7 5/8 Reg
|
2589
|
2675
|
|
9 1/4
|
3
|
7 5/8 Reg
|
2758
|
2850
|
|
9 1/2
|
3
|
7 5/8 Reg
|
2923
|
3020
|
|
9 3/4
|
3
|
7 5/8 Reg
|
3098
|
3200
|
|
10
|
3
|
8 5/8 Reg
|
3276
|
3385
|
|
Order Instructions:
-
Type (Slick or Spiral grooved)
-
Outside and inside size and overall length
-
Connection type and size
-
API Stress relief Groove on pin and box ends
-
Cast or pressed steel thread protectors
-
other special request, for example: slips or elevator recess and hard banding style.
|
NON-MAGNETIC DRILL COLLARS
Materials of Non-magnetic Drill Collars are made from chrome manganese low carbon austenitic alloy with the following characteristics:
-
The chemical composition should be controlled strictly during the refining and forging process.
-
With excellent lower Magnetic permeability, high strength of mechanical properties and outstanding resistant to stress corrosion cracking and no tendency to galling.
|
|
Mechanical Properties
|
|
Size OD (in)
|
Yield Strength (Mpa)
|
Tensile Strength (Mpa)
|
Elongation (%)
|
Reduction of area (%)
|
Impact AKV (ft.lb)
|
|
3 1/8~6 3/4
|
not less than 758
|
not less than 827
|
not less than 18
|
50
|
not less than 50
|
|
7~10
|
not less than 689
|
not less than 758
|
not less than 20
|
50
|
not less than 50
|
|
|
|
Order Instructions
-
Size of Non-magnetic Drill Collar
-
Length
-
Connection Type
-
API Stress relief recess
-
other speical request.
|
|
| |
|
|
 |
|
