PVDF Encapsulated Control Line Nickel Alloy Incoloy 825 Capillary Tubing

Meilong Tube manufactures either welded or seamless hydraulic control lines for subsurface applications. Hydraulic control line is available in mainly five materials, varying wall thicknesses, and a wide range of working pressure ratings. The line is supplied on spools to exact length requirements. Upon request, it is pressure tested hydraulically, purged with nitrogen gas, or clean oil liquid, and sealed on both ends prior to shipping.

Welded hydraulic control line is floating plug drawn to ASTM specifications and is available in any length. Material types for hydraulic control lines include stainless steel TP316L which is suitable for sweet to moderately corrosive environments, Duplex stainless steel 2205, Super Duplex stainless steel 2507, nickel alloy Incoloy 825 and Inconel 625 are suitable for severely corrosive environments and high working pressures and temperatures. Control system fluids must be compatible with the environments and operating temperatures of the control line.

Control line encapsulation also is available, where requested, to provide additional crush and abrasion resistance during installation. The encapsulation material should be matched for compatibility with well fluids and temperature requirements.

Encapsulated Control Line

MEILONG offers the encapsulation of control lines to provide increased durability, as well as chemical and corrosion resistance to meet each project’s specialized requirements, we offer different encapsulation types, such as: HDPE (High Density Polyethylene), Santoprene, PVC (Polyvinyl Chloride), Haylar and PVDF (Polyvinylidene Fluoride).

Flatpacks are commonly used when several different lines are terminated at approximately the same depth in the well.

Common applications include intelligent well systems, deep-set chemical injection lines with downhole gauge cable and safety valve lines with shallow set chemical injection lines. For some applications bumper bars are also encapsulated into the flatpack to provide additional crush resistance.

Standard & Approvals

Control Lines are manufactured according to applicable ASTM standards for each specific material.

Tubes can be supplied flushed, filled, and filtered per client requirements and to the appropriate NAS/SAE standards.

Quality & Testing

- Manufactured in accordance with Standard Inspection and Quality Plans

Design & Construction

- Encapsulation for single line

- Encapsulation profiles to suit customer application

- Custom Line Marking

- Full range of application materials

Encapsulation Materials

- PP (Polypropylene) /TPR (Santoprene) / PA

(Nylon) / PVDF / ETFE (Tefzel) / ECTFE (Halar)

FEP / PFA / ECA 3000

Features of Encapsulated Control Line

Maximize protection of downhole line

Increase crush resistance during installation

Protect control line against abrasion and pinching

Eliminate long term stress corrosion failure of control line

Improve clamping profile

Single or multiple encapsulation for ease of running and added protection

Available Alloy Grades for Control Line Tubing Inside Encapsulation

Chemical Composition of Incoloy 825

Norm Equivalence

Incoloy alloy 825 is a nickel-iron-chromium alloy with additions of molybdenum and copper. This nickel steel alloy’s chemical composition is designed to provide exceptional resistance to many corrosive environments. It is similar to alloy 800 but has improved resistance to aqueous corrosion. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localized attack such as pitting and crevice corrosion. Alloy 825 is especially resistant to sulfuric and phosphoric acids. This nickel steel alloy is used for chemical processing, pollution-control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production, and pickling equipment.

Characteristics

Excellent resistance to reducing and oxidizing acids

Good resistance to stress-corrosion cracking

Satisfactory resistance to localized attack like pitting and crevice corrosion

Very resistant to sulfuric and phosphoric acids

Good mechanical properties at both room and elevated temperatures up to approximately 1020° F

Permission for pressure-vessel use at wall temperatures up to 800°F

Standard Encapsulation Profiles

Round, Single Line	Item	Standard Dimensions
	1/8’’ OD Line	0.250’’ (6.35 mm) Dia.
	1/4’’ OD Line	0.433’’ (11.0 mm) Dia.
	3/8’’ OD Line	0.535’’ (13.6 mm) Dia.
	1/2’’ OD Line	0.660’’ (16.8 mm) Dia.

Square, Single Line	Item	Standard Dimensions
	1/8’’ OD Line	0.250’’ x 0.250’’ (6.35 mm x 6.35 mm)
	1/4’’ OD Line	0.433’’ x 0.433’’ (11.0 mm x 11.0 mm)
	3/8’’ OD Line	0.535’’ x 0.535’’ (13.6 mm x 13.6 mm)
	1/2’’ OD Line	0.660’’ x 0.660’’ (16.8 mm x 16.8 mm)

Rectangular, 2 Lines	Item	Standard Dimensions
	1/4’’ OD Line	Width: 0.710’’ (18.0 mm) Height: 0.410’’ (10.4 mm)

Rectangular, 3 Lines	Item	Standard Dimensions
	1/4’’ OD Line	Width: 0.990’’ (25.1 mm) Height: 0.410’’ (10.4 mm)