Incoloy Alloy UNS N08825 Capillary Coiled Tubing High Tensile For Oil Gas Fields

Incoloy Alloy UNS N08825 Encapsulated Control Line Bright Annealed Seamless

HYDRAULIC CONTROL LINE APPLICATIONS

STAINLESS STEEL AND HIGH NICKEL ALLOYS COILED TUBING SOLUTIONS

MEILONG is an important manufacturer in premium coiled seamless & welded tubular solutions for oil and gas applications. In an endeavor to increase its presence in subsea, MEILONG has extended its offer by developing a highly innovative tubular solution for umbilical projects.

MEILONG has developed a strong and unique expertise in premium quality tubes to answer the most stringent specifications of its customers. Based on this expertise in high pressure, and extremely high pressure tubes, MEILONG’s state-of-art factory is exclusively dedicated to the manufacturing and supply of super duplex and high nickel alloys tubes for corrosive downhole applications and is now ready to offer the highest specifications for your toughest challenges.

High quality polymeric jackets/encapsulations provide added protection

Core tubing is evaporated with the latest thermoplastic elastomeric compounds designed to outlast the life of most project tubing installations by reducing the possibility of corrosion and mechanical damage. They can stand up to a wide range of chemical inhibitors and seawater. Most jackets are manufactured from fire retardant, all-weather, abrasion-resistant compound, designed to remain strong and flexible through wide ranges of temperatures and pressures.

PVC

PP (polypropylene)

SP (Santoprene)

F46 (FEP)

Nylon

Incoloy Alloy N08825, Chemical composition

Application: Very good sour well and chloride stress corrosion cracking resistance.

Tensile strength, min.: 85000psi (586MPa)

Yield strength, min.: 35000psi (240MPa)

Elongation in 2 in., min.: 30%

Application

Incoloy Alloy N08825 seam welded pressure tubing in the heat treated condition is typically used in oil and natural gas wells for chemical injection applications. In such applications, it is commonly reffered to as capillary tubing and is free-hanging (self-supporting) inside the production casing. The chemicals being injected are often used to enhance production flow rates, inhibit corrosion or scaling and/or de-water. The tubing is frequently supplied as 5,000 to 35,000 ft. coils on a wooden reel, depending on size.

Description

Incoloy Alloy N08825 is a titanium-stabilized austenitic nickel-iron-chromium alloy with additions of molybdenum and copper. The chemical composition of the alloy is listed in Table 1. The alloy is characterized by good resistance to stress-corrosion cracking due to its nickel content (38.0 to 46.0) and satisfactory resistance to pitting and crevice corrosion. Incoloy Alloy N08825 has shown good corrosion resistance in oil and gas production environments containing hydrogen sulfide, carbon dioxide and chlorides. Consult ISO 15156-3, Table A.14 for the limits regarding material type 4c in hydrogen sulfide containing environments for oil and gas production.

Standards and Specifications

ASTM B704, Standard Specification for Welded UNS N06625, UNS N06219, and UNS N08825 Alloy Tubes, except in the as-cold worked condition

ASTM B423, Standard Specification for UNS N08825 Seamless Pipe and Tube

Meets the material limits for annealed and cold-worked, solid solution, nickel-based alloys listed in ISO 15156-3 for material type 4c in Table A.14.

Production Process

Welded & Redrawn Tubing

Strip splice welds join lengths of cold rolled strip to enable long lengths between orbital welds (greater than 14,500 ft between orbital welds is achievable). The strip is formed into a tubular cross section and longitudinally seam welded using the gas tungsten arc (GTAW) process. The tubing is first sunk to an intermediate outside diameter, heat treated, and make the same process to obtain the desired size.

Seamless & Redrawn Tubing

Seamless extruded tube hollows are drawn or drawn / sunk to final size to produce seamless tubing coils 500 to 2,000 ft. long, depending upon the size. The tubing is heat treated and joined by orbital welding to achieve the desired length. The final material condition of the tubing is heat treated.

Quality Assurance

Eddy current test (ECT)

Ultrasonic test

Hydrostatic test

Chemical composition analysis

Tensile test

Hardness test

Dimension & visual inspect

Metallographic analysis

Coiled Encapsulated Tubing (Bare Tubing Size)

Tubing length up to 32,808 feet (10,000 m)

For control line, chemical injection line, umbilicals

Available materials

Austenitic: 316L

Duplex: S31803, S32205

Super Duplex: S32750

Nickel alloy: N06625, N08825

Norm Equivalence