Arctic Service Drilling Pipes
Arctic service drill pipes are a drilling tool developed for application in low temperature environments in order to meet the needs of oil and gas prospecting operations in high altitude regions. Although at present there is no global standard for arctic service drill pipes, our products have been developed after researching matching and heat treatment methods for alloying elements, adopting special low temperature resistant materials, strictly controlling the S and P content and non-metal impurities in raw materials, controlling grain size, and adopting special heating processing technique methods. The product has been sold in Russia, and its mechanical properties and low temperature resistance are outlined in the table below:
Table of Mechanical Property of Arctic Service Drill Pipe
| Item | Grade | Yield Strength（MPa） | Tensile Strength（MPa）Min. | |
| Min. | Max. | |||
| Pipe Body
|
E-75 | 517 | 724 | 689 |
| X-95 | 655 | 862 | 724 | |
| G-105 | 724 | 931 | 793 | |
| Tool Joint | 827 | 965 | ||
Requirements on longitudinal Charpy impact energy and cross-section area of Arctic Service Drill Pipe (10mm×10mm)
| Item | Temperature（℃） | Avg. Impact Energyfor Three SamplesAK avg（J） | Impact Energyfor Single SampleAK（J） | Avg. Cross-section Areafor Three SamplesSA% avg | Cross-section Areafor Single SampleSA% |
| Pipe Body | -60 | ≥60 | ≥48 | ≥50% | ≥50% |
| Tool Joint | -60 | ≥47 | ≥38 | ≥50 | ≥50% |
| Welding Zone | -60 | ≥35 | ≥27 | ≥40% | ≥30% |