API 5CT Casing Pipe
- Grade: H40, J55, K55, L80, L80-13Cr, L80-9Cr, N80-1, N80Q, P110
- O.D: 4 1/2″-20″
- Length: R1, R2, R3
- Connection: STC, LTC, BTC, Premium Connection (VAM TOP, NEW VAM, PH-6)
API 5CT Casing Pipe
API 5CT Casing Pipe is a vital component in the oil and gas industry, designed to provide structural integrity to the wellbore during drilling and production. Adhering to the rigorous API 5CT standards, this casing pipe offers exceptional strength, durability, and corrosion resistance, ensuring reliable performance in challenging environments. It is extensively used to support the well walls and prevent collapse, making it essential for both onshore and offshore drilling operations. Discover the advantages of API 5CT Casing Pipe to enhance the safety and efficiency of your drilling projects.
Chemical Composition of API 5CT Casing Pipe
| Group | Grade | Type | C | Mn | Mo | Cr | Ni | Cu | P | S | Si | ||||
| min | max | min | max | min | max | min | max | max | max | max | max | max | |||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 1 | H40 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.03 | – |
| J55 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.03 | – | |
| K55 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.03 | – | |
| N80 | 1 | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.03 | – | |
| N80 | Q | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.03 | – | |
| R95 | – | – | 0.45 | – | 1.9 | – | – | – | – | – | – | 0.03 | 0.03 | 0.45 | |
| 2 | M65 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.03 | – |
| L80 | 1 | – | 0.43 a | – | 1.9 | – | – | – | – | 0.25 | 0.35 | 0.03 | 0.03 | 0.45 | |
| L80 | 9Cr | – | 0.15 | 0.3 | 0.6 | 0.9 | 1.1 | 8 | 10 | 0.5 | 0.25 | 0.02 | 0.01 | 1 | |
| L80 | 13Cr | 0.15 | 0.22 | 0.25 | 1 | – | – | 12 | 14 | 0.5 | 0.25 | 0.02 | 0.01 | 1 | |
| C90 | 1 | – | 0.35 | – | 1.2 | 0.25 | 0.85 | – | 1.5 | 0.99 | – | 0.02 | 0.01 | – | |
| T95 | 1 | – | 0.35 | – | 1.2 | 0.25 | 0.85 | 0.4 | 1.5 | 0.99 | – | 0.02 | 0.01 | – | |
| C110 | – | – | 0.35 | – | 1.2 | 0.25 | 1 | 0.4 | 1.5 | 0.99 | – | 0.02 | 0.005 | – | |
| 3 | P110 | – | – | – | – | – | – | – | – | – | – | – | 0.030 | 0.030 | – |
| 4 | Q125 | 1 | – | 0.35 | 1.35 | – | 0.85 | – | 1.5 | 0.99 | – | 0.02 | 0.01 | – | |
Mechanical Properties of API 5CT Casing Pipe
| Group | Grade | Type | Total elongation under load % | Yield strength (Mpa) | Tensile strength (Mpa) | Hardness max. | Specified wall thickness | Allowable hardness variation | ||
| min | max | min. | HRC | HBW | mm | HRC | ||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 1 | 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 | – | – | – | – | |
| 2 | M65 | – | 0.5 | 448 | 586 | 586 | 22 | 235 | – | – |
| L80 | 1 | 0.5 | 552 | 655 | 655 | 23 | 241 | – | – | |
| L80 | 9Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | – | – | |
| L80 | 13Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | – | – | |
| C90 | 1 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | ≤ 12.70 12.71 to 19.04 19.05 to 25.39 ≥ 25.40 |
3.0 4.0 5.0 6.0 | |
| T95 | 1 | 0.5 | 655 | 758 | 724 | 25.4 | 255 | ≤ 12.70 12.71 to 19.04 19.05 to 25.39 ≥ 25.40 |
3.0 4.0 5.0 6.0 | |
| C110 | – | 0.7 | 758 | 828 | 793 | 30 | 286 | ≤ 12.70 12.71 to 19.0 19.05 to 25.39 ≥ 25.40 |
3.0 4.0 5.0 6.0 | |
| 3 | P110 | – | 0.6 | 758 | 965 | 862 | – | – | – | – |
| 4 | Q125 | 1 | 0.65 | 862 | 1034 | 931 | – | – | ≤ 12.70 12.71 to 19.04 ≥ 19.05 |
3.0 4.0 5.0 |
Specifications
| Standard | API 5CT Casing Pipe |
| Steel Grade | H40, J55, K55, N80, L80, C90, T95, P110, Q125, C75, and R95 |
| Group | 1, 2, 3, 4 |
| Casing Pipe Size | OD: 4 1/2″ – 20″ (114.3 – 508mm) |
| Casing Pipe Length | Range 1 (R1): 4.88 to 7.62 meters (16 to 25 feet) Range 2 (R2): 7.62 to 10.36 meters (25 to 34 feet) Range 3 (R3): 10.36 to 14.63 meters (34 to 48 feet) |
| Ends Connections | STC, LTC, BTC, Premium Connection (VAM TOP, NEW VAM, PH-6) |
| Packing | Packed in bundles with steel strapping, protective end caps, marked with relevant information, coated with rust preventative oil, wrapped in waterproof material for export, and often placed in wooden crates or pallets for secure transportation. |
| Section Shape | Round |
| Brand | Approved Manufacturer List (AML), or Country of Origin restrictions |
| Place of Origin | Made in China |
| MOQ | 25 Tons/Size |
| Transportation | Land transportation by truck or train, sea transportation by container ship or bulk ship. |
Applications of API 5CT Casing Pipe
Well Drilling and Completion:
Primary Casing: The main function of casing is to provide structural integrity to the drilled wellbore. It prevents the wellbore from collapsing and isolates different underground formations.
Intermediate Casing: Installed in stages to manage pressure and prevent the well from caving in. Intermediate casing helps in protecting the well from high-pressure zones or unstable formations.
Production Casing: The final casing string set through the productive interval of the well. It provides a conduit for hydrocarbons to the surface and seals off high-pressure zones.
Zonal Isolation:
Fluid Isolation: Casing helps to isolate different fluid zones in the subsurface, preventing contamination and cross-flow between zones.
Pressure Containment: It contains the pressure within the well, ensuring safe and controlled extraction of hydrocarbons.
Well Control:
Blowout Prevention: Casing plays a critical role in well control by providing a secure pathway to manage well pressure and preventing blowouts.
Kick Control: During drilling, if unexpected high-pressure zones are encountered (kick), the casing helps in controlling and managing the situation.
Corrosion and Wear Protection:
Corrosion Resistance: API 5CT casing pipes are often treated or coated to resist corrosion, ensuring the longevity and safety of the well.
Mechanical Wear: Protects the well from mechanical wear and tear during drilling and production operations.
Well Stimulation:
Hydraulic Fracturing: Used in hydraulic fracturing operations to deliver fracturing fluids and proppants into the wellbore.
Acidizing: Helps in acidizing treatments to enhance permeability and improve hydrocarbon flow.
Enhanced Oil Recovery (EOR):
Steam Injection: Supports steam injection operations for thermal EOR methods.
Chemical Injection: Used for chemical EOR methods, providing a conduit for chemicals to enhance oil recovery.
Geothermal Wells:
Heat Extraction: In geothermal energy production, casing pipes are used to extract heat from underground reservoirs.
Offshore Drilling:
Subsea Wells: Provides structural support and pressure containment for subsea wells.
Platform Wells: Used in wells drilled from offshore platforms, providing safety and structural integrity.
Carbon Capture and Storage (CCS):
CO2 Injection Wells: Used in CO2 injection wells for carbon sequestration projects, isolating and containing injected CO2.
Waste Disposal:
Disposal Wells: Used in disposal wells for the safe injection of waste fluids into underground formations.
Monitoring and Maintenance:
Well Monitoring: Casing strings allow for the installation of monitoring equipment to keep track of well conditions and performance.
Maintenance Operations: Facilitates various maintenance operations like workovers and recompletions to ensure well integrity and productivity.
