About Us
Eastern Steel Manufacturing Co.,Ltd is a leading manufacturer and distributor of seamless steel pipe, welded steel pipe, OCTG products and fittings. We supply first-step processing, semi-finished parts and finished parts to help our clients meet fabrication requirements beyond their capacity or to improve operations by moving forward the pre-production processing.
News
In this column you can find the steel pipe related articles you need, including industry trends, product standards and materials, and some technical guidelines.
Services
Eastern Steel Manufacturing Co.,Ltd not only improve product production and sales services, but also provide additional value-added services. As long as you need, we can complete your specific needs together.
Facility
Eastern Steel Manufacturing Co.,Ltd not only improve product production and sales services, but also provide additional value-added services. As long as you need, we can complete your specific needs together.
Projects
Many years of large-scale project experience in various fields（Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical etc.）, professional project team is responsible from receiving until the end of the project.
Drill pipe is one of the most critical rotating drill string components in oil, gas, and geothermal drilling engineering. API 5DP drill pipe is defined and standardized by the American Petroleum Institute (API) in the API 5DP standard. API 5DP drill pipe ensures safety and reliability in high-load, high-fatigue drilling environments through stringent specifications for dimensions, steel grades, mechanical properties, and joint types. This standard is applicable to demanding conditions in onshore drilling, offshore drilling, deep wells, ultra-deep wells, directional wells, and horizontal wells, and is the commonly specified procurement standard for global oil companies and EPC projects.
E75 / X95 / G105 / S135, covering wells from conventional to ultra-deep.
Suitable for long horizontal sections and high-speed applications.
Enhances joint area strength.
Compatible with the full range of IF, FH, REG, and NC series.
Adaptable to API drilling equipment systems, reducing replacement and maintenance costs.
|
Grade |
(C) (%) |
(Mn) (%) |
(P) (%) |
(S) (%) |
(Si) (%) |
(Cr) (%) |
(Ni) (%) |
(Mo) (%) |
(Cu) (%) |
|
E75 |
≤ 0.35 |
0.60-1.10 |
≤ 0.020 |
≤ 0.010 |
≤ 0.35 |
≤ 0.15 |
≤ 0.25 |
≤ 0.20 |
≤ 0.20 |
|
X95 |
≤ 0.35 |
0.60-1.10 |
≤ 0.020 |
≤ 0.010 |
≤ 0.35 |
0.75-1.15 |
0.40-0.75 |
0.15-0.25 |
≤ 0.20 |
|
G105 |
≤ 0.35 |
0.60-1.10 |
≤ 0.020 |
≤ 0.010 |
≤ 0.35 |
0.75-1.15 |
0.40-0.75 |
0.15-0.25 |
≤ 0.20 |
|
S135 |
≤ 0.35 |
0.60-1.10 |
≤ 0.020 |
≤ 0.010 |
≤ 0.35 |
0.75-1.15 |
0.40-0.75 |
0.15-0.25 |
≤ 0.20 |
|
Grade |
Yield Strength (psi) |
Tensile Strength |
Elongation |
Impact Test |
Hardness |
|
E75 |
75,000 |
100,000 |
20 |
40 |
≤ 30 |
|
X95 |
95,000 |
105,000 |
15 |
40 |
≤ 32 |
|
G105 |
105,000 |
115,000 |
13 |
40 |
≤ 35 |
|
S135 |
135,000 |
145,000 |
10 |
40 |
≤ 38 |
|
Standard |
API 5DP Drill Pipe |
|
Steel Grade |
E75, X95, G105, S135 |
|
Ends Process |
IU, EU, IEU |
|
Drill Pipe Size |
2 3/8″, 2 7/8″, 3 1/2″, 4″, 4 1/2″, 5″, 5 1/2″, 6 5/8″ |
|
Drill Pipe Length |
Range 1 (R1): from 18 to 22 feet (5.49 to
6.71 meters). |
|
Ends Connections |
IF, FH, REG, NC |
|
Packing |
Packed in bundles secured with steel straps or wire, with thread protectors on both ends to prevent damage during transportation and storage. |
|
Section Shape |
Round, Spiral, Square |
|
MOQ |
1 Piece/Size |
|
Transportation |
Land transportation by truck or train, sea transportation by container ship or bulk ship. |
|
Label 1 |
Label 2 |
Grade |
Upset Type |
RSC Type |
Pipe-body OD (mm) |
Pipe WT (mm) |
Drill-pipe Weld Neck (mm) |
Tool Joint OD (mm) |
Pin ID (mm) |
Pin Length (mm) |
Box OD Length (mm) |
RSC Bevel Dia. (mm) |
Approx. Mass (kg/m) |
|
4 |
14.00 |
E |
IU |
NC40 |
101.60 |
8.38 |
106.4 |
133.4 |
71.4 |
177.80 |
254.00 |
127.40 |
22.42 |
|
4 |
14.00 |
X |
IU |
NC40 |
101.60 |
8.38 |
106.4 |
133.4 |
68.3 |
177.80 |
254.00 |
127.40 |
22.76 |
|
4 |
14.00 |
G |
IU |
NC40 |
101.60 |
8.38 |
106.4 |
139.7 |
61.9 |
177.80 |
254.00 |
127.40 |
23.61 |
|
4 |
14.00 |
S |
IU |
NC40 |
101.60 |
8.38 |
106.4 |
139.7 |
50.8 |
177.80 |
254.00 |
127.40 |
24.03 |
|
4 1/2 |
13.75 |
E |
IU |
NC46 |
114.30 |
6.88 |
119.1 |
152.4 |
85.7 |
177.80 |
254.00 |
145.26 |
22.50 |
|
2 3/8 |
6.65 |
E |
EU |
NC26 |
60.32 |
7.11 |
65.1 |
85.7 |
44.5 |
177.80 |
203.20 |
82.95 |
10.45 |
|
2 3/8 |
6.65 |
X, G |
EU |
NC26 |
60.32 |
7.11 |
65.1 |
85.7 |
44.5 |
177.80 |
203.20 |
82.95 |
10.58 |
|
2 7/8 |
10.40 |
E |
EU |
NC31 |
73.02 |
9.19 |
81.0 |
104.8 |
54.0 |
177.80 |
228.60 |
100.41 |
16.25 |
|
2 7/8 |
10.40 |
X, G |
EU |
NC31 |
73.02 |
9.19 |
81.0 |
104.8 |
50.8 |
177.80 |
228.60 |
100.41 |
16.50 |
|
2 7/8 |
10.40 |
S |
EU |
NC31 |
73.02 |
9.19 |
81.0 |
111.1 |
41.3 |
177.80 |
228.60 |
100.41 |
17.19 |
|
3 1/2 |
9.50 |
E |
EU |
NC38 |
88.90 |
6.45 |
98.4 |
120.7 |
68.3 |
203.20 |
266.70 |
116.28 |
15.77 |
|
3 1/2 |
13.30 |
E |
EU |
NC38 |
88.90 |
9.35 |
98.4 |
120.7 |
68.3 |
203.20 |
266.70 |
116.28 |
20.77 |
|
3 1/2 |
13.30 |
X |
EU |
NC38 |
88.90 |
9.35 |
98.4 |
127.0 |
65.1 |
203.20 |
266.70 |
116.28 |
21.76 |
|
3 1/2 |
13.30 |
G |
EU |
NC38 |
88.90 |
9.35 |
98.4 |
127.0 |
61.9 |
203.20 |
266.70 |
116.28 |
21.90 |
|
3 1/2 |
13.30 |
S |
EU |
NC38 |
88.90 |
9.35 |
98.4 |
127.0 |
54.0 |
203.20 |
266.70 |
116.28 |
22.22 |
|
3 1/2 |
15.50 |
E |
EU |
NC40 |
88.90 |
11.40 |
98.4 |
127.0 |
65.1 |
203.20 |
266.70 |
116.28 |
24.67 |
|
3 1/2 |
15.50 |
X |
EU |
NC40 |
88.90 |
11.40 |
98.4 |
127.0 |
61.9 |
203.20 |
266.70 |
116.28 |
25.07 |
|
3 1/2 |
15.50 |
G |
EU |
NC40 |
88.90 |
11.40 |
98.4 |
127.0 |
54.0 |
203.20 |
266.70 |
116.28 |
25.38 |
|
3 1/2 |
15.50 |
S |
EU |
NC40 |
88.90 |
11.40 |
98.4 |
139.7 |
57.2 |
203.20 |
266.70 |
127.40 |
26.19 |
|
4 |
14.00 |
E |
EU |
NC46 |
101.60 |
8.38 |
114.3 |
152.4 |
82.6 |
177.80 |
254.00 |
145.26 |
23.67 |
|
4 |
14.00 |
X, G |
EU |
NC46 |
101.60 |
8.38 |
114.3 |
152.4 |
82.6 |
177.80 |
254.00 |
145.26 |
24.12 |
|
4 |
14.00 |
S |
EU |
NC46 |
101.60 |
8.38 |
114.3 |
152.4 |
76.2 |
177.80 |
254.00 |
145.26 |
24.46 |
|
4 1/2 |
13.75 |
E |
EU |
NC50 |
114.30 |
6.88 |
127.0 |
168.3 |
95.3 |
177.80 |
254.00 |
153.99 |
23.65 |
|
4 1/2 |
16.60 |
E |
EU |
NC50 |
114.30 |
8.56 |
127.0 |
168.3 |
95.3 |
177.80 |
254.00 |
153.99 |
27.51 |
|
4 1/2 |
16.60 |
X, G |
EU |
NC50 |
114.30 |
8.56 |
127.0 |
168.3 |
95.3 |
177.80 |
254.00 |
153.99 |
28.07 |
|
4 1/2 |
16.60 |
S |
EU |
NC50 |
114.30 |
8.56 |
127.0 |
168.3 |
88.9 |
177.80 |
254.00 |
153.99 |
28.47 |
|
4 1/2 |
20.00 |
E |
EU |
NC50 |
114.30 |
10.92 |
127.0 |
168.3 |
92.1 |
177.80 |
254.00 |
153.99 |
32.93 |
|
4 1/2 |
20.00 |
X, G |
EU |
NC50 |
114.30 |
10.92 |
127.0 |
168.3 |
88.9 |
177.80 |
254.00 |
153.99 |
33.63 |
|
4 1/2 |
20.00 |
S |
EU |
NC50 |
114.30 |
10.92 |
127.0 |
168.3 |
76.2 |
177.80 |
254.00 |
153.99 |
34.34 |
|
4 1/2 |
16.60 |
E |
IEU |
NC46 |
114.30 |
8.56 |
119.1 |
158.8 |
82.6 |
177.80 |
254.00 |
145.26 |
27.36 |
|
4 1/2 |
16.60 |
X, G |
IEU |
NC46 |
114.30 |
8.56 |
119.1 |
158.8 |
76.2 |
177.80 |
254.00 |
145.26 |
27.73 |
|
4 1/2 |
16.60 |
S |
IEU |
NC46 |
114.30 |
8.56 |
119.1 |
158.8 |
69.9 |
177.80 |
254.00 |
145.26 |
28.04 |
|
4 1/2 |
20.00 |
E |
IEU |
NC46 |
114.30 |
10.92 |
119.1 |
158.8 |
76.2 |
177.80 |
254.00 |
145.26 |
32.94 |
|
4 1/2 |
20.00 |
X |
IEU |
NC46 |
114.30 |
10.92 |
119.1 |
158.8 |
69.9 |
177.80 |
254.00 |
145.26 |
33.69 |
|
4 1/2 |
20.00 |
G |
IEU |
NC46 |
114.30 |
10.92 |
119.1 |
158.8 |
63.5 |
177.80 |
254.00 |
145.26 |
33.97 |
|
4 1/2 |
20.00 |
S |
IEU |
NC46 |
114.30 |
10.92 |
119.1 |
158.8 |
57.2 |
177.80 |
254.00 |
145.26 |
34.23 |
|
5 |
19.50 |
E |
IEU |
NC50 |
127.00 |
9.19 |
130.2 |
168.3 |
95.3 |
177.80 |
254.00 |
153.99 |
31.79 |
|
5 |
19.50 |
X |
IEU |
NC50 |
127.00 |
9.19 |
130.2 |
168.3 |
88.9 |
177.80 |
254.00 |
153.99 |
32.58 |
|
5 |
19.50 |
G |
IEU |
NC50 |
127.00 |
9.19 |
130.2 |
168.3 |
82.6 |
177.80 |
254.00 |
153.99 |
32.95 |
|
5 |
19.50 |
S |
IEU |
NC50 |
127.00 |
9.19 |
130.2 |
168.3 |
69.9 |
177.80 |
254.00 |
153.99 |
33.60 |
|
5 |
19.50 |
E |
IEU |
5 1/2 FH |
127.00 |
9.19 |
130.2 |
177.8 |
95.3 |
203.20 |
254.00 |
170.66 |
33.22 |
|
5 |
19.50 |
X, G |
IEU |
5 1/2 FH |
127.00 |
9.19 |
130.2 |
177.8 |
95.3 |
203.20 |
254.00 |
170.66 |
33.61 |
|
5 |
19.50 |
S |
IEU |
5 1/2 FH |
127.00 |
9.19 |
130.2 |
184.2 |
88.9 |
203.20 |
254.00 |
170.66 |
34.89 |
|
5 |
25.60 |
E |
IEU |
NC50 |
127.00 |
12.70 |
130.2 |
168.3 |
88.9 |
177.80 |
254.00 |
153.99 |
40.73 |
|
5 |
25.60 |
X |
IEU |
NC50 |
127.00 |
12.70 |
130.2 |
168.3 |
76.2 |
177.80 |
254.00 |
153.99 |
41.80 |
|
5 |
25.60 |
G |
IEU |
NC50 |
127.00 |
12.70 |
130.2 |
168.3 |
69.9 |
177.80 |
254.00 |
153.99 |
42.11 |
|
5 |
25.60 |
E |
IEU |
5 1/2 FH |
127.00 |
12.70 |
130.2 |
177.8 |
88.9 |
203.20 |
254.00 |
170.66 |
42.14 |
|
5 |
25.60 |
X |
IEU |
5 1/2 FH |
127.00 |
12.70 |
130.2 |
177.8 |
88.9 |
203.20 |
254.00 |
170.66 |
42.51 |
|
5 |
25.60 |
G |
IEU |
5 1/2 FH |
127.00 |
12.70 |
130.2 |
184.2 |
88.9 |
203.20 |
254.00 |
170.66 |
43.35 |
|
5 |
25.60 |
S |
IEU |
5 1/2 FH |
127.00 |
12.70 |
130.2 |
184.2 |
82.6 |
203.20 |
254.00 |
170.66 |
43.75 |
|
5-1/2 |
21.90 |
E |
IEU |
5 1/2 FH |
139.70 |
9.17 |
144.5 |
177.8 |
101.6 |
203.20 |
254.00 |
170.66 |
35.43 |
|
5-1/2 |
21.90 |
X |
IEU |
5 1/2 FH |
139.70 |
9.17 |
144.5 |
177.8 |
95.3 |
203.20 |
254.00 |
170.66 |
36.36 |
|
5-1/2 |
21.90 |
G |
IEU |
5 1/2 FH |
139.70 |
9.17 |
144.5 |
184.2 |
88.9 |
203.20 |
254.00 |
170.66 |
37.61 |
|
5-1/2 |
21.90 |
S |
IEU |
5 1/2 FH |
139.70 |
9.17 |
144.5 |
190.5 |
76.2 |
203.20 |
254.00 |
180.18 |
39.27 |
|
5-1/2 |
24.70 |
E |
IEU |
5 1/2 FH |
139.70 |
10.54 |
144.5 |
177.8 |
101.6 |
203.20 |
254.00 |
170.66 |
39.19 |
|
5-1/2 |
24.70 |
X, G |
IEU |
5 1/2 FH |
139.70 |
10.54 |
144.5 |
184.2 |
88.9 |
203.20 |
254.00 |
170.66 |
41.32 |
|
5-1/2 |
24.70 |
S |
IEU |
5 1/2 FH |
139.70 |
10.54 |
144.5 |
190.5 |
76.2 |
203.20 |
254.00 |
180.18 |
42.97 |
|
6-5/8 |
25.20 |
E |
IEU |
6 5/8 FH |
168.28 |
8.38 |
176.2 |
203.2 |
127.0 |
203.20 |
279.40 |
195.66 |
41.03 |
|
6-5/8 |
25.20 |
X |
IEU |
6 5/8 FH |
168.28 |
8.38 |
176.2 |
203.2 |
127.0 |
203.20 |
279.40 |
195.66 |
41.03 |
|
6-5/8 |
25.20 |
G |
IEU |
6 5/8 FH |
168.28 |
8.38 |
176.2 |
209.6 |
120.7 |
203.20 |
279.40 |
195.66 |
42.60 |
|
6-5/8 |
25.20 |
S |
IEU |
6 5/8 FH |
168.28 |
8.38 |
176.2 |
215.9 |
108.0 |
203.20 |
279.40 |
195.66 |
44.73 |
|
6-5/8 |
27.70 |
E |
IEU |
6 5/8 FH |
168.28 |
9.19 |
176.2 |
203.2 |
127.0 |
203.20 |
279.40 |
195.66 |
43.79 |
|
6-5/8 |
27.70 |
X, G |
IEU |
6 5/8 FH |
168.28 |
9.19 |
176.2 |
209.6 |
120.7 |
203.20 |
279.40 |
195.66 |
45.35 |
|
6-5/8 |
27.70 |
S |
IEU |
6 5/8 FH |
168.28 |
9.19 |
176.2 |
215.9 |
108.0 |
203.20 |
279.40 |
195.66 |
47.48 |
Drill pipe size: 2 3/8″ to 2 7/8″;
Steel grade options: E75 or X95; Lengths: Primarily R1/R2; Lightweight, easy to install, suitable for short wells and shallow exploration.
Drill pipe size: 3 1/2″;
Steel grade selection: X95 / G105 / S135;
Length: R1 / R2 / R3;
Improved tensile strength and torsional resistance, suitable for directional drilling or multi-stage horizontal wells.
Drill pipe size: 4″ – 5 1/2″;
Steel grade selection: G105 / S135;
Length: Primarily R2 / R3;
Supports high torque and high tensile loads, suitable for offshore drilling or complex well trajectories.
Drill pipe size: 6 5/8″;
Steel grade: S135;
Length: R3; Extremely high strength and fatigue resistance, used in special high-difficulty wells (deepwater, geothermal, unconventional oil and gas).
1. The larger the outer diameter, the higher the torque and tensile load it can withstand.
2. The higher the steel grade, the more suitable it is for deep wells and high-torque environments.
3. Length Selection: Depending on the drilling rig and well depth, R3 is used for deep wells or long horizontal sections.
4. Fitting Type (IU/EU/IEU): For high-strength wells, IEU or EU + S135 steel grade is recommended.
Internationally recognized standard, facilitating global project tendering.
Traceable MTC (EN 10204 3.1/3.2).
High safety redundancy design.
Reduces the risk of unplanned downtime (NPT).
The standard outer diameter (OD) range for API 5DP drill pipe is 2 3/8″ to 6 5/8″, covering the needs of small-diameter conventional drilling to large-diameter deep and ultra-deep well operations.
All dimensions must conform to the outer diameter, tolerance, and fitting requirements of API Spec 5DP.
No.
Under the API 5DP standard, the outer diameter, wall thickness, and joint size are determined by the specifications; the steel grade only affects the mechanical performance requirements. Drill pipes of the same size can be produced as E75, X95, G105, or S135.
Standard delivery documents include:
Mill Test Certificate (EN 10204 3.1 or 3.2);
Chemical composition and mechanical property report;
Dimensional and weight inspection records;
API Monogram certification documents (if applicable).
Read more: API Drill Pipe Thread Types or Size of Drill Pipe
E-mail: sales@eastern-steels.com
