High Collapse Seamless Steel Casing for Deep Well Service
the benefits of high collapse seamless steel Casing for Deep well service High Collapse Seamless Steel Casing for Deep Well Service Deep well service requires durable and reliable casing materials to withstand the immense pressure and stress that comes with drilling at great depths. One such material that has proven to be highly effective in...
the benefits of high collapse seamless steel Casing for Deep well service
High Collapse Seamless Steel Casing for Deep Well Service
In addition to its strength, high collapse seamless steel casing also provides excellent corrosion resistance. Deep well service often involves exposure to corrosive fluids and environments, which can deteriorate the casing over time. however, high collapse seamless steel casing is made from corrosion-resistant alloys that can withstand these harsh conditions, ensuring the longevity and reliability of the well.
Furthermore, high collapse seamless steel casing offers superior hydraulic performance. The smooth interior surface of the casing allows for efficient fluid flow, reducing friction and pressure drop. This not only improves the overall efficiency of the well, but also minimizes the risk of blockages or restrictions that can impede production.
Another significant advantage of high collapse seamless steel casing is its versatility. It can be used in a wide range of well applications, including Oil and gas exploration, geothermal drilling, and water well drilling. Its adaptability makes it a cost-effective choice for various deep well service projects, eliminating the need for multiple casing materials and reducing overall installation and Maintenance costs.
| Tensile and Hardness requirements | |||||||||
| grade | Yield Strength MPa | Tensile Strength | Hardness a,c | Specified wall thickness | Allowable Hardness Variation b | ||||
| type | Total Elongation Under Load | min MPa | max | ||||||
| min | max | HRC | HBW | mm | HRC | ||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| H40 | — | 0.5 | 276 | 552 | 414 | — | — | — | — |
| J55 | — | 0.5 | 379 | 552 | 517 | — | — | — | — |
| K55 | — | 0.5 | 379 | 552 | 655 | — | — | — | — |
| N80 | 1 | 0.5 | 552 | 758 | 689 | — | — | — | — |
| N80 | Q | 0.5 | 552 | 758 | 689 | — | — | — | — |
| R95 | — | 0.5 | 655 | 758 | 724 | — | — | — | — |
| L80 L80 | 1 | 0.5 | 552 | 655 | 655 | 23 | 241 | — | — |
| L80 | 9Cr 13Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | — | — |
| 0.5 | 552 | 655 | 655 | 23 | 241 | — | — | ||
| C90 | 1 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | £12.70 | 3 |
| 12.71 to 19.04 | 4 | ||||||||
| 19.05 to 25.39 | 5 | ||||||||
| ³ 25.40 | 6 | ||||||||
| T95 | 1 | 0.5 | 655 | 758 | 724 | 25.4 | 255 | £12.70 | 3 |
| 12.71 to 19.04 | 4 | ||||||||
| 19.05 to 25.39 | 5 | ||||||||
| ³ 25.40 | 6 | ||||||||
| C110 | — | 0.7 | 758 | 828 | 793 | 30 | 286 | £12.70 | 3 |
| 12.71 to 19.04 | 4 | ||||||||
| 19.05 to 25.39 | 5 | ||||||||
| ³ 25.40 | 6 | ||||||||
| P110 | — | 0.6 | 758 | 965 | 862 | — | — | — | — |
| Q125 | 1 | 0.65 | 862 | 1034 | 931 | b | — | £12.70 | 3 |
| 12.71 to 19.04 19.05 | 4 | ||||||||
| 5 | |||||||||
| a In case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method. | |||||||||
| b No hardness limits are specified, but the maximum variation is restricted as a manufacturing control in accordance with 7.8 and 7.9. | |||||||||
| c For through-wall hardness tests of grades L80 (all types), C90, T95 and C110, the requirements stated in HRC scale are for maximum mean hardness number. | |||||||||
