Home > Products > oil casing > Seamless Steel Casing 5½" (139.7mm) API-5CT Certified – 8.05-12.7mm Wall
Seamless Steel Casing 5½" (139.7mm) API-5CT Certified – 8.05-12.7mm Wall
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Product Details
| Brand Name | Grand Victory | Place of Origin | China | |
| Model Number | N/A | Certification | API | |
| After-sales Service Provided | Overseas third-party support available | Warranty | 10years | |
| Weight | 44.2kg/m | Dimension(L*W*H) | 12000mm*114.3mm ² | |
| Condition | New | Voltage | N/A | |
| Power(W) | N/A | Wall Thickness | 6.2-22.22mm | |
| Nominal Mass per Unit Length | 20.83-64.14kg/m |
Product Description
| OD (inch/mm) | Wall Thickness Range (mm) | Typical Chemical Composition | Application Scenarios |
| 4½" (114.3mm) | 5.21-15.88 | C 0.34-0.39%, Mn 1.25-1.50% (J55/K55) | Shallow oil wells, low-pressure gas wells |
| 5" (127.0mm) | 5.59-12.70 | C 0.34-0.38%, Mn 1.45-1.70% (N80) | Medium-depth wells, conventional oil/gas |
| 5½" (139.7mm) | 6.20-22.22 | C 0.15-0.22%, Cr 12-14% (L80-13Cr) | Sour gas wells, hydrogen sulfide (H₂S) environments |
| 6⅝" (168.3mm) | 7.32-12.06 | C 0.26-0.35%, Mo 0.15-0.25% (P110) | Deep wells, high-pressure gas reservoirs |
| 7" (177.8mm) | 8.05-12.70 | C 0.34-0.38%, Mn 1.45-1.70% (N80) | Shale gas horizontal wells, fracturing operations |
| 9⅝" (244.5mm) | 8.94-12.70 | C 0.15-0.22%, Cr 12-14% (L80-13Cr) | Ultra-deep wells, high-temperature/pressure reservoirs |
| 13⅜" (339.7mm) | 15.88 | C 0.34-0.39%, Mn 1.25-1.50% (J55/K55) | Surface casing, shallow cementing |
| 20" (508.0mm) | 20.62 | C 0.26-0.35%, Mo 0.15-0.25% (P110) | Offshore platform wells, large-diameter well completions |
Product Name: API-5CT Seamless Casing and Tubing
Steel Grade: J55, N80, P110, H40, K55, L80, L80-3Cr/9Cr/13Cr, M65, C90, T95, Q125
Material: 34CrMo4, H40, J55, K55, N80, L80, M65, C90, T95, P110, Q125
Standard: API 5CT/ISO 11960
Technique: Cold Drawn/Hot Rolled
Application: Oil and Gas Pipes
Outer Diameter Ranges:
Tubing: 48.26mm~114.3mm (1.05 inches~4 1/2 inches)
Casing: 114.3mm~762mm (4 1/2 inches~30 inches)
Wall Thickness: 2.87mm~30mm (compliant with API 5CT standards)
Length Ranges:Tubing:
R1: 6.10m~7.32m
R2: 8.53m~9.75m
R3: 11.58m~12.80m
Casing:
R1: 4.88m~7.62m
R2: 7.62m~10.36m
R3: 10.36m~14.63m
End-Finish Types:Tubing: P, I, N, U
Casing: P, S, B, L
Product Features:
Material Optimization:
Cr-Mo series steel with precise chemical composition control ensures resistance to Sulfide Stress Corrosion Cracking (SSCC).
Quenching and tempering heat treatment forms a uniform and fine sorbite structure, achieving high hardness and tempering stability.
Heat Treatment Process:
Strict temperature-controlled quenching and tempering guarantee consistent mechanical properties, narrow yield strength ranges, and controllable hardness.
Sulfide Corrosion Resistance:
Microstructure of fully tempered martensite is suitable for H₂S-containing acidic oil and gas environments.
Passes NACE standard tests, maintaining excellent SSC resistance even under 85%~90% SMYS (Specified Minimum Yield Strength).
Inspection Standards:
Non-destructive Testing:
Full-body inspection for longitudinal/transverse defects on inner and outer surfaces, with standard notch depth ≤5% of wall thickness.
Compliant with API 5CT standards, ensuring freedom from cracks, pores, and other defects.
Packaging & Delivery:
Packaging: Seawater-resistant steel shelves, iron pallets, or customized solutions per customer requirements.
Delivery Time: 20–55 days (varies based on order size and process complexity).
Minimum Order Quantity (MOQ): 20 tons.
Application Scenarios:
Sour Oil and Gas Fields: High-corrosion environments with H₂S and CO₂.
Deep/Ultra-Deep Wells: Resistant to high pressure and temperatures (up to 200°C+).
Cementing and Workover: Supports wellbore stability and isolates formation fluids.
Certification & Surface Treatment:
Certification: API pipe certification.
Surface Treatment: Black paint, varnish coating; cross-sectional shape: round.
Origin: China.
Note: This product is non-secondary processed and supports customization. Contact the supplier for technical agreements.
Tianjin Grand Victory Petroleum Equipment Co., Ltd. is a comprehensive enterprise for production, processing, sales, technology research and development, and spot storage. Located in Jinghai District, Tianjin, China, it was founded in 2008 with a registered capital of 11.18 million yuan. It has import and export rights, ISO9001 quality system certification, American Petroleum Institute API 5CT certification and a number of national patent certificates. The production workshop is equipped with several types of equipment such as highprecision CNC lathes, thread tightening machines, hydraulic presses, etc., and complete inspection and measurement instruments. Products includewww.longkailai.com
Contact Us
- Tianjin Grand Victory Petroleum Equipment Co., Ltd
- Contact namebone Chat Now
- AddressNo.17 Guanghai Road,Economic Development Area Jinghai District.Tianjin City
Product Categories
| oil casing | oil tubing | oil pipe threads connection | oil pipe coupling |
| oil pup joint/drill | oil pipe X-over,Adapter |
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