ALLLAND Boiler Steel Pipe Supply
Hello, welcome to ALLLAND STEEL PIPE MANUFACTURER. Our Drill Pipe is manufactured in strict compliance with standard requirements and comes with complete MTC/Traceability documentation. All parameters, including tolerances, fall within specified ranges. It is designed to operate reliably under demanding conditions such as mining operations. The production process for Drill Pipe incorporates a rigorous quality inspection system to ensure pipe quality.
Alllandsteel is a steel pipe manufacturer based in China with 25 years of experience. The facility spans 22,000 square meters, represents a RMB 700 million investment, and operates four production lines (JCOE, ERW, SMLS, SSAW) alongside five coating lines. With an annual production capacity of 250,000 tons, the factory covers specifications ranging from Ø406 to Ø1524 and holds multiple international certifications (API/ASTM/EN/ISO/JIS). Focused on steel pipes, creating value for you!
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Drill Pipe is one of the core tubular components in oil and gas drilling operations, working alongside tubing and casing to support extraction activities. Its primary function is to connect the drill bit to the drilling rig, bearing pressure, transmitting torque, and conveying drilling fluid within the tubular system. Composed of a pipe body and drill pipe couplings, it is engineered to withstand demanding operational environments.
O.D.:
60.3 mm – 168.3 mm (2 3/8“ – 6 5/8”)
W.T.:
6.65 mm – 13.97 mm
Length:
Range 1 / Range 2 / Range 3
Process:
Seamless pipe + Friction welded Tool Joint
Standards:
API 5DP
Steel Grades:
E75 / X95 / G105 / S135
Tube Ends& Surface Treatment:
IEU / EU + Tool Joint; Black paint, phosphating, rust-preventive oil
Joint Type:
NC26 / NC31 / NC38 / NC40 / NC46 / NC50
Drill Pipe Manufactured by ALLLAND
The dimensions in the table comply with the API 5DP standard.
| Nominal Size | O.D. | W.T.(W.T.) | I.D. | Length |
| 2 3/8″ | 60.33 mm | 6.65 mm | 47.03 mm | R1 / R2 / R3 |
| 2 7/8″ | 73.02 mm | 9.19 mm | 54.64 mm | R1 / R2 / R3 |
| 3 1/2″ | 88.90 mm | 9.19 mm | 70.52 mm | R1 / R2 / R3 |
| 4″ | 101.60 mm | 8.56 mm | 84.48 mm | R1 / R2 / R3 |
| 4 1/2″ | 114.30 mm | 9.19 mm | 95.92 mm | R1 / R2 / R3 |
| 5″ | 127.00 mm | 9.19 mm | 108.62 mm | R1 / R2 / R3 |
| 5 1/2″ | 139.70 mm | 9.19 / 11.43 mm | 116.08 / 116.84 mm | R2 / R3 |
| 6 5/8″ | 168.28 mm | 10.36 / 13.97 mm | 147.56 / 140.34 mm | R2 / R3 |
The steel grade of drill pipe directly determines its application scenarios and service life. Different grades exhibit varying load-bearing capacities and yield strengths, making them suitable for distinct environments. Below are several commonly used steel grades, all compliant with API 5DP standards.
| Grade | Minimum Yield Strength | Tensile Strength Range | Strength Level | Typical Applications |
| E75 | ≥ 75,000 psi (≥ 517 MPa) | 100,000 – 140,000 psi | Medium | Shallow wells, conventional vertical wells, low-load drilling |
| X95 | ≥ 95,000 psi (≥ 655 MPa) | 110,000 – 140,000 psi | Medium-High | Medium-depth wells, directional drilling, horizontal wells |
| G105 | ≥ 105,000 psi (≥ 724 MPa) | 125,000 – 150,000 psi | High | Deep wells, high-torque and high-load drilling |
| S135 | ≥ 135,000 psi (≥ 931 MPa) | 145,000 – 165,000 psi | Ultra-High | Ultra-deep wells, HPHT wells, extreme drilling conditions |
Common drill pipe steel grades include E75, X95, G105, and S135. The selection of steel grade depends on the operating environment, the grade’s yield strength, well depth, and torque requirements.
A tool joint is a connection welded to both ends of the drill pipe, enabling pipe connection and torque transmission. Manufactured from high-strength alloys, it serves as a core component of the drill pipe.
China is a major producer of drill pipes. Reliable Chinese manufacturers include ALLLAND Steel Pipe Factory from Hebei Province. With a complete industrial chain encompassing production, forging, welding, and heat treatment, they supply high-quality drill pipes worldwide.
