Suzhou Meilong Tube Co., Ltd.
Meilong Tube is devoting its capability to bring global customers most cost-effective tubing products
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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) |