UNS S32205 Duplex 2205 TPV Encapsulated Control Line Capillary
Tubing 1 / 2 '' OD x 0.065 '' WT
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.
The encapsulation of downhole components such as Hydraulic Control
Lines, Single Line Encapsulation, Dual-Line Encapsulation
(FLATPACK), Triple-Line Encapsulation (FLATPACK) has become
prevalent in downhole applications. The overlaying of plastic
provides several benefits that help to ensure a successful
completion.
Encapsulation provides a protective layer to keep the lines from
being scratched, dented, and possibly crushed while running in
hole.
Encapsulation of several components (Flat Pack) provides a
consolidation that will help reduce equipment and personnel that is
needed to deploy multiple single components. In many cases, a flat
pack is mandatory as rig space can be limited.
Encapsulation keeps from metal to metal contact.
Encapsulation can provide protection to underlying components while
in hole such as a lines that can be across a sand face or possibly
in contact with a high rate of gas.
FREE OF ORBITAL WELDS for TPV Encapsulated Control Lines
Hydraulic Control Lines depending on the length of the application
are subjected to raw materials. Orbital welds have become
unnecessary in our industry as well completions are often greater
than the standard yield of a mill produced coil. Our seam-welded
tubing production uses Tungsten Inert Gas (TIG) welding machines,
and Laser Welding Machines. This process gives the operator the
tools to perform a repeatable, high-quality weld. Our current
equipment, together with cold-drawing machines allow us to produce
OD Size ranges of 1/8” – 1” and Wall Thicknesses of 0.028” -0.095”.
Common alloys for tubing products are 316L, 2205, 2507, 825, 625,
and Monel 400.
NDT
We perform a variety of tests to validate the integrity of our
products.
Eddy current test
Pressure Testing
Liquid - A variety of capabilities for different specification
tubing.
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.
Design & Construction
- Encapsulation for single line
- Encapsulation profiles to suit customer application
- Custom Line Marking
- Full range of application materials
Encapsulation Materials for Duplex Stainless Steel Control Lines
| MSCL Name | Industry Name | Temperature Range | Abrasion Resistance | Resistance to Brines | Resistance to Hydrocarbons |
| Nylon 11 | Rilsan 11, Nylon 11, Polyamide | -60ºС to 135ºС | 5 | 3 | 5 |
| Polypropylene | Polyolefin | -25ºС to 150ºС | 3 | 5 | 3 |
| TPE, TPR, TPV | Santoprene | -30ºС to 135ºС | 3 | 5 | 3 |
| PVDF | Solef, Kynar | -30ºС to 150ºС | 4 | 4 | 5 |
| ECTFE | Halar | -75ºС to 150ºС | 5 | 5 | 5 |
| ETFE | Tefzel | -100ºС to 150ºС | 5 | 5 | 5 |
| FEP | Teflon | -110ºС to 150ºС | 3 | 5 | 5 |
| MFA/PFA | Teflon | -110ºС to 250ºС | 3 | 5 | 5 |
5 = Excellent 1 = Poor
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
| Austenitic: | 316L |
| Duplex: | S31803/S32205 S32750 |
| Nickel alloy: | N08825 N06625 |
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) |
