6.625in Gas-Seal Casing, 9.19mm Thick Wall
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1 m.t.
- Supply Capability:
- 1000 m.t./month
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Specification
6.625" TripleSeal™ Gas Well Casing
Leak Prevention Expert: Stops 99.9% gas migration
Innovations:
Metal-to-Metal Seals: 3 independent barriers in coupling area
Anti-Galling Surface: Tungsten carbide coating on threads
Thermal Stability: Handles 25°C/km geothermal gradients
Case Study:
Used in 28 Sichuan Basin shale gas wells, these casings reduced annular pressure buildup by 76% compared to API-LTC connections.
Performance:
Gas Tightness: 5,000psi @ 100°C
Max OD: 168mm (6.625")
Material: 13Cr steel
Extras: Free running tool adapters + 3D wellbore clearance simulation
Petroleum Casing Product Information
1. Product Overview
J55 Steel Deep Well Casing, P110 High-Grade Drilling Casing
petroleum casing is strictly manufactured in compliance with API 5CT standards, covering mainstream steel grades such as J55, N80, and P110. It is suitable for wellbore reinforcement and formation isolation in onshore oilfields, offshore platforms, and complex geological environments, ensuring lifecycle safety of oil and gas wells.
2. Technical Specifications
Size Range:
Outer diameter 114.3 mm (4.5") to 508 mm (20"), wall thickness 6.2-25.4 mm, tolerances conform to API 5CT standards (outer diameter ±0.5%, wall thickness ±10%).Mechanical Properties:
J55 Grade: Yield strength ≥379 MPa, tensile strength ≥517 MPa;
P110 Grade: Yield strength ≥758 MPa, tensile strength ≥965 MPa;
Collapse resistance: N80 Grade ≥80 MPa, P110 Grade ≥138 MPa (tested per ASTM A370).
Thread Performance:
API round thread (BTC) sealing pressure ≥20 MPa;
Premium connections (e.g., BGT2) helium leakage rate ≤1×10⁻⁶ cm³/s (tested per ISO 13679 CAL IV).
3. Chemical Composition (Example: L80 Grade)
| Content | 0.25% | 1.20% | 0.45% | 0.50% | 0.25% | 0.020% | 0.010% |
| Note: Cr-Mo alloy design enhances H₂S corrosion resistance (H₂S partial pressure ≤0.3 kPa). |
4. Application Scenarios
High-Temperature & High-Pressure Wells:
L80-13Cr material withstands 180°C and CO₂ partial pressure ≤1 MPa (per NORSOK M-001).Shale Gas Horizontal Wells:
TP140TT high-collapse casing with internal pressure resistance ≥105 MPa, compatible with multi-stage fracturing.Deepwater Offshore Wells:
9-5/8" casing passes 30 MPa external pressure test, suitable for 3,000-meter water depth.
5. Production Process
Material Smelting:
Electric Arc Furnace (EAF) + LF refining, sulfur/phosphorus ≤0.015%;
Continuous casting billet Φ180-400 mm, central segregation ≤Class C 1.0.Hot Rolling:
Three-roll retained mandrel mill, wall thickness uniformity ≤5%;
Online spray cooling, final rolling temperature 900±20°C.Heat Treatment:
Quenching (920°C water cooling) + Tempering (620°C air cooling), hardness 22-32 HRC;
Sour-service pipes use HWQ process, grain size ≥ASTM 7.Quality Inspection:
100% ultrasonic testing (UT) for longitudinal defects (sensitivity Φ1.6 mm flat-bottom hole);
Full-length hydrostatic test (50-100 MPa, holding ≥10 seconds);
Drift test with API drift mandrel (100% pass rate).
6. Case Studies
Middle East Oilfield Project:
Delivered 13-3/8" P110 casing for 4,500-meter well depth, collapse resistance 120 MPa.Sichuan Shale Gas Field:
7" TP140TT casing supports 30-stage fracturing, boosting single-well output by 25%.
Key Features
J55/P110 Casing: High-strength, corrosion-resistant, compliant with API 5CT.
TP140TT Grade: Optimized for shale gas fracturing with extreme pressure resistance.
Deepwater Compliance: Certified for 3,000-meter offshore operations.
- Q: Can steel pipes be galvanized?
- Indeed, it is possible to galvanize steel pipes. Galvanization involves the application of a safeguarding zinc layer to steel or iron in order to hinder corrosion. The steel pipes are immersed in a solution of molten zinc, resulting in a chemical union between the zinc and steel that produces a protective coating resistant to corrosion. Galvanization finds widespread use across multiple fields, including plumbing, construction, and outdoor structures, primarily to prolong the durability of steel pipes and inhibit rust formation.
- Q: What is the difference between seamless and ERW steel pipes?
- Seamless steel pipes are manufactured without any welding or seams, resulting in a uniform and continuous structure. On the other hand, ERW (Electric Resistance Welded) steel pipes are created by welding the edges of the steel strip or plate together to form a tube. This welding process can cause a visible seam along the length of the pipe. While seamless pipes are generally considered stronger and more reliable due to their uninterrupted structure, ERW pipes are more cost-effective and readily available.
- Q: What's the material of Q325 steel pipe?
- Q235 refers to the material yield stress of 235MPa carbon steel, because of its low price, good machining and welding performance, it is generally used for welding structural parts. Of course, the unimportant parts can be used for it.
- Q: What are the different types of steel pipes available?
- There are several types of steel pipes available, including seamless pipes, welded pipes, galvanized pipes, and stainless steel pipes.
- Q: Can steel pipes be insulated for thermal efficiency?
- Steel pipes can indeed be insulated to enhance their thermal efficiency. By insulating steel pipes, heat loss or gain can be minimized, depending on the specific purpose. Typically, the insulation material is wrapped around the pipes, creating a protective barrier. This barrier effectively prevents heat transfer between the pipes and the surrounding environment. As a result, the energy required to heat or cool the fluid flowing through the pipes is significantly reduced, leading to improved energy efficiency. This practice is widely employed in industries such as HVAC, oil and gas, and industrial processes, where precise temperature control is crucial. Moreover, insulation also serves to prevent condensation and corrosion on the outer surface of the pipes. All in all, insulating steel pipes is a cost-effective measure that enhances thermal efficiency and reduces energy consumption.
- Q: What are the different methods of protecting steel pipes from external damage?
- There are several methods of protecting steel pipes from external damage, including coating the pipes with a corrosion-resistant material such as epoxy or polyethylene, applying a layer of protective tape, installing a cathodic protection system, using concrete or rock shielding, and implementing measures to prevent soil movement or impact damage.
- Q: Can steel pipes be used for conveying potable water?
- Yes, steel pipes can be used for conveying potable water. However, it is important to ensure that the steel pipes are coated or lined with suitable materials to prevent corrosion and contamination of the water supply. Regular maintenance and monitoring of the pipes are also necessary to ensure the water remains safe for consumption.
- Q: Can steel pipes be used for underground fuel storage systems?
- Steel pipes are an excellent choice for underground fuel storage systems. Due to their strength, durability, and resistance to corrosion, they are widely used in this application. By opting for steel pipes, one can rely on a secure and long-lasting solution for underground fuel storage. These pipes are capable of withstanding the pressure and weight of the fuel, making them suitable for this purpose. Moreover, their easy weldability and interconnectivity provide flexibility in designing and constructing such systems. However, it is crucial to ensure that the steel pipes used in underground fuel storage systems are properly coated or lined to prevent corrosion and protect the fuel from contamination. Regular inspections and maintenance play a vital role in identifying and addressing any potential issues that may arise.
- Q: How do steel pipes withstand high pressure and temperature?
- Steel pipes are able to withstand high pressure and temperature due to their inherent properties and construction. Steel is known for its strength and durability, making it an ideal material for pipes used in demanding applications. Firstly, steel pipes are made from high-quality steel alloys that have been specifically designed to withstand extreme conditions. These alloys are chosen for their high tensile strength, which allows the pipes to withstand the internal pressure exerted by fluids or gases flowing through them. The steel used in these pipes is often alloyed with other elements such as chromium, molybdenum, or nickel to enhance its resistance to corrosion and high temperatures. Secondly, the construction of steel pipes plays a crucial role in their ability to withstand high pressure and temperature. Steel pipes are typically manufactured using a seamless or welded process. Seamless pipes are made by piercing a solid steel billet, resulting in a continuous and uniform pipe with no seams or joints. This seamless construction eliminates weak points and ensures that the pipe can handle high pressure without any risk of leakage. Welded pipes, on the other hand, are made by joining two or more pieces of steel together using a welding process. The welds are carefully inspected and tested to ensure their integrity and strength. Although welded pipes may have seams, they are equally capable of withstanding high pressure and temperature when manufactured to the appropriate standards. Additionally, steel pipes can be further reinforced to enhance their resistance to pressure and temperature. For instance, pipes used in extremely high-pressure applications may be thicker or have additional layers of protective coatings. These measures help to increase the strength and durability of the pipes, allowing them to withstand even higher pressures and temperatures. In summary, steel pipes are able to withstand high pressure and temperature due to the strength and durability of the steel alloys used in their construction. The seamless or welded construction of these pipes eliminates weak points and ensures their ability to handle extreme conditions. Additional reinforcement and protective coatings can be applied to further enhance their resistance to pressure and temperature.
- Q: What is the difference between steel pipes and fiberglass-reinforced pipes?
- Steel pipes are made from a durable and strong material known as steel, which provides high strength and resistance to corrosion. On the other hand, fiberglass-reinforced pipes are made from a combination of fiberglass and resin, offering a lightweight and corrosion-resistant alternative. While steel pipes are commonly used for heavy-duty applications such as oil and gas pipelines, fiberglass-reinforced pipes are often preferred for applications that require resistance to chemicals and high temperatures, like in the chemical industry. Additionally, fiberglass-reinforced pipes have the advantage of being non-conductive, making them suitable for certain electrical applications.
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6.625in Gas-Seal Casing, 9.19mm Thick Wall
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1 m.t.
- Supply Capability:
- 1000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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