API 5DP
Oil Drill Pipe (API 5DP/SY)
API 5DP and SY standards, friction welding, automatic testing and full traceability, E-75 to S-135. OD 60-140mm, designed for petroleum drilling and deep well projects.
Product Overview
API 5DP/SY standard oil drill pipe is produced by certified partner factories. This product is specifically designed for petroleum drilling, natural gas extraction and deep geotechnical engineering projects requiring high-strength, high-reliability drill string components.
The pipe body is made from premium steel sourced from reputable steel mills. The inner-upset ends are connected by friction welding — a solid-phase welding process that achieves defect-free, high-strength welds. Each drill pipe undergoes automatic testing and complete traceability records, including mechanical property tests, non-destructive testing (NDT), and dimensional inspection, with complete Material Test Certificates (MTC/Factory Inspection Certificates) provided with shipment.
Tool joints undergo precision quench and temper heat treatment, with thread surfaces protected by specialized coatings or phosphating to prevent thread damage and ensure reliable make-up and break-out cycles throughout the drill pipe's service life.
Core Advantages
API 5DP Certified
Fully compliant with API 5DP specification and SY/T 5561 Chinese petroleum standard
Full Traceability
Auto-testing records, NDT reports and material certificates for each drill pipe
Friction Welding
Solid-phase friction welding eliminates weld defects, providing excellent joint strength
Premium Tool Joints
Quench & temper tool joint treatment, wear-resistant coating, long service life, easy make-up/break-out
Technical Specifications
| Nominal Size (in) | OD (mm) | Wall Thickness (mm) | Thread Connection | Steel Grade | Pipe Type | Length (mm) |
|---|---|---|---|---|---|---|
| 2-3/8" | 60.3 | 6.45 / 7.11 / 7.95 | NC26 / REG | E-75 / G-105 / S-135 | IU | 3000-9500 |
| 2-7/8" | 73.0 | 7.62 / 8.64 / 9.65 | NC31 / REG | E-75 / G-105 / S-135 | IU | 3000-9500 |
| 3-1/2" | 88.9 | 6.88 / 7.34 / 9.35 / 11.40 | NC31 / NC38 / REG | E-75 / G-105 / S-135 | IU | 3000-9500 |
| 4" | 101.6 | 7.97 / 8.38 / 10.16 | NC38 / NC40 / REG | E-75 / G-105 / S-135 | IU | 3000-9500 |
| 4-1/2" | 114.3 | 8.56 / 10.03 / 11.99 | NC46 / NC50 / REG | E-75 / G-105 / S-135 | IU | 3000-9500 |
| 5" | 127.0 | 9.19 / 11.10 / 12.70 | NC50 / REG | E-75 / G-105 / S-135 | IU | 3000-9500 |
| 5-1/2" | 139.7 | 9.17 / 10.54 / 12.70 | NC56 / REG | E-75 / G-105 / S-135 | IU | 3000-9500 |
Steel Grade Mechanical Properties
| Steel Grade | Min Yield (psi) | Max Yield (psi) | Min Tensile (psi) |
|---|---|---|---|
| E-75 | 75,000 | 105,000 | 100,000 |
| G-105 | 105,000 | 135,000 | 125,000 |
| S-135 | 135,000 | 165,000 | 145,000 |
Typical Application Areas
Petroleum Drilling
Exploration and production drilling for crude oil and natural gas fields
Deep Geothermal
Deep geothermal well drilling for power generation and heating
Deep Water Wells
Deep aquifer water wells and large diameter water supply projects
