API 5CT H40 casing is a steel pipe that implements the API SPEC 5CT standard of the American Petroleum Institute, and is mainly used for the exploitation of resources such as oil and natural gas. H40 octg casing is part of the full range of API oil casing, and its product specifications include outer diameter and wall thickness range, specifically outer diameter Φ26.67mm~Φ219.08mm, wall thickness 3.18mm~22.2mm. H40 casing is mainly used for well wall support of oil and gas wells to ensure the stability and safety of the well wall.
According to different lengths, H40 Casing Pipe can be divided into three specifications: R-1, R-2 and R-3 to meet different well depths and operation requirements.
In the drilling, production and transportation of oil and gas, API 5CT H40 oil special pipe is usually used in underground casing strings to protect the well wall, isolate the formation, and prevent accidents such as blowouts and well collapses.
API 5CT H40 pipe Specification
| Outer diameter | Casing: OD 4 1/2"- 20" (114.3mm-508mm) Tubing: OD 2 3/8" - 4 1/2" (60.3mm-114.30mm) |
| Wall Thickness | 0. 205"- 0.635" |
| Length | R1:5.49-6.71m ;R2: 8.23-9.14m ;R3: 11.58-13.72m |
| Connection | Casing: LTC, STC, BTC, VAM.Tubing: NUE, EUE |
| End | Beveled, Square cut. And pipe protection cap specially for casing and tubing |
| Surface | Corrosion proofing water based paint |
| Heat treatment | Normalized, Quencher+Temper |
Chemical Properties
| Carbon | Silicon | Manganese | Phosphorous | Sulphur | Molybdenum | Nickel | Chromium | Copper | Others |
|---|---|---|---|---|---|---|---|---|---|
| – | – | – | 0.03 | 0.03 | – | – | – | – | – |
Mechanical Properties
| Yield Strength | Tensile Strength | Elongation A5 min | |||
|---|---|---|---|---|---|
| MPa min | ksi min | MPa min | MPa min | ksi min | Percentage |
| 414 | – | 60 | – | ||
casing pipeline
Manufacturing Process
The manufacturing process of API 5CT H40 seamless steel pipes for oilfield casing mainly consists of the following steps:
- Smelting: High-quality alloy steel or carbon steel is selected for smelting to ensure that the composition of the raw materials meets the standards.
- Rolling: Seamless pipe blanks are formed through high-temperature heating and rolling, ensuring the density and uniformity of the pipe material.
- Heat Treatment: The rolled pipe material undergoes heat treatment to improve its compressive strength and toughness.
- Inspection: Non-destructive testing is strictly carried out according to relevant standards to ensure that the quality of each batch of products meets industry requirements.
- Processing and Customization: Cutting, bending, and other processing are performed according to customer needs, providing one-on-one customized services.
API 5CT H40 Casing Applications:
- Oil and Gas Extraction: Suitable for high-pressure, high-temperature environments.
- Chemical Industry: Suitable for applications requiring high corrosion resistance.
- Power Industry: Suitable for pipeline systems in power plants.
- Construction Engineering: Can be used for the construction of critical infrastructure.
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