Quick Details
- Processing Time:-
- Port:Tianjin
- Supply Ability: 15million
- Brand Name:FD
Heavy Weight Drill Pipe
Heavy weight drill pipe is a medium-weight drill
tool similar to drill pipe, whose wall is thicker than that of drill pipe and thinner than that of drill collar. Its tube is connected with special length-added drill pipe
joint (integral heavy weight drill pipe is made up of tube and tool joint). Among assemblies, it is generally added between drill pipe and drill collar to prevent sudden changes in
cross-section of drill string, and reduce its fatigue. Using it to replace part of the drill collar can reduce torque, improve load, and increase drilling ability during deep well
drilling; meanwhile pick-up sub and safety clamp will not be used drilling operation ,which is easy to operate and can save tripping time. It can drill in in high speed under low torque
in directional wells and reduces the abrasion and fracture of string without differential pressure and sticking because of the lower steel grade than drill collar, small touching area with the
well wall.
square Kelly China: Found Petroleum Equipment
If you are finding high
quality and cheap API 7-1 Heavy Weight Drill Pip, you can choose us! We adhere to the
principle of good faith cooperation and look forward to working with you as a partner!
CHEMICAL COMPOSITION
Integral heavy weight drill pipe
Size
Outer diameter
Inside diameter
Joint outer diameter
Joint inside diameter
Connecting thread
Slip max. diameter
Upset middle diameter
Min. drift diameter
3 1/2
3 1/2
2 1/4
4 3/4
2 1/4
NC38
3 7/8
4
2
2 1/16
(4 7/8, 5)
2 1/16
1 13/16
4
4
2 1/2
5 1/4
2 1/2
NC40
4 3/16
4 1/2
2 1/4
2 9/16
2 9/16
2 5/16
4 1/2
4 1/2
2 11/16
6 1/4
2 11/16
NC46
4 11/16
5
2 7/16
2 3/4
2 3/4
2 1/2
2 13/16
2 13/16
2 9/16
5
5
3
6 5/8
3
NC50
5 1/8
5 1/2
2 3/4
5 1/2
5 1/2
3 1/4
7
3 1/4
5 1/2 FH
5 11/16
6
3
3 3/8
(7 1/4, 7 1/2)
3 3/8
3 1/8
3 7/8
3 7/8
3 5/8
4
4
3 3/4
6 5/8
6 5/8
4
8
4
6 5/8 FH
6 15/16
7 1/8
3 3/4
4 1/2
(8 1/4, 8 1/2)
4 1/2
4 1/4
5
5
4 3/4
Spiral heavy weight drill pipe
Specification mm
Tube
Joint
ID mm
Elevator upsetmm
elevator groove/Slip outside diameter mm
Screw in diametermm
Spiral groove depthmm
Thread Type
OD mm
ID mm
88.9(3 1/2)
54
92.1
88.9
101.6
9.5
NC38
120.6
54
114.3(4 1/2)
69.8
117.5
114.3
127
12.7
NC46
158.8
69.8
127.0(5)
76.2
130.2
127
139.7
12.7
NC50
165.1
76.2
Steel Mark
Chemical Composition%
C
Si
Mn
P
S
Cr
Mo
Cu
Al
4145H
0.42~0.48
0.15~0.35
0.90~1.20
≤0.03
≤0.03
0.90~1.20
0.15~0.25
≤0.2
0.025~0.045
Other Elements:N≤0.015,Ni≤0.5
Yield strength
Tensile Strength
ElongationA%
HB
Charpy impactAkv J
MPa
Psi
MPa
Psi
≥758
≥110000
≥965
≥140000
≥13
285~341
≥54
Product superiority:
In the process of heat treatment, a normalizing
process is added, which makes the threads more granular, increases the thread strength, and effectively improves the service life of the product.
Weld heavy weight drill pipe:
Using the current domestic and foreign advanced heat
treatment technology of friction welding deformation ,and heat affected zone smaller, welding process more simple and strict welding deformation and
heat treatment standard procedure qualification, tuning parameters to ensure better welding quality more stable and reliable.
Welded heavy weight drill pipe
Type
Outer diameter
Inside diamter mm
Joint type
mm
in
MJZ29-NC31-I/II
73.03
2 7/8
50.8
NC31
MJZ35-NC38-I/II
88.9
3½
57.15
NC38(3½ IF)
52.39
MJZ40-NC40-I/II
101.6
4
63.5
NC40(4FH)
65.09
MJZ45-NC46-I/II
114.3
4½
68.26
NC46(4IF)
69.85
71.44
MJZ50-NC50-I/II
127
5
76.2
NC50(4½ IF)
MJZ55-5½ FH-I/II
139.7
5½
82.55
5½ FH
85.72
98.42
101.6
MJZ66-65/8FH-I/II
168.3
Aug-65
101.6
65/8FH