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Corrosion-Resistant Alloyed Coiled Tubing

Carbon Steel Coiled Tubing - CT55 to CT130 +
Corrosion-Resistant Alloyed Coiled Tubing -
Coiled Line Pipe +
Reinforced Thermoplastic Pipe (RTP) +
Multi-Channel Coiled Tubing +
Cable/Optical Fiber Injection E-Coiled Tubing +

Corrosion-Resistant Alloyed Coiled Tubing

Product Introduction

Corrosion-resistant alloyed coiled tubing is continuously welded steel tubing made from stainless steel, titanium alloy steel, and other high-alloy materials. It offers high strength, excellent corrosion resistance, and reliable performance under high temperature and high pressure. Compared with micro-alloyed coiled tubing, it significantly reduces corrosion rates.

Features & Applications

Designed for oil and gas wells with high H₂S, Cl⁻, CO₂, and other severe corrosive conditions. Suitable for:

· Ultra-deep wells and HPHT gas wells.
· Shale gas, underground coal gasification, natural gas hydrate, and heavy oil thermal projects.
· Well completion strings, velocity strings, and water injection strings.
· Gathering pipelines and offshore oil & gas transportation systems.

Corrosion-resistant Alloy Coiled Tubing Mechanical Performance

Grade Yield strength Tensile strength
psi MPa psi MPa
LDCT55-CRA 55000~65000 379~448 ≥70000 ≥483
LDCT70-CRA 70000~80000 483~552 ≥80000 ≥552
LDCT80-CRA 80000~90000 552~620 ≥88000 ≥607
LDCT90-CRA 90000~100000 620~689 ≥97000 ≥669
LDCT100-CRA ≥100000 ≥689 ≥110000 ≥758
LDCT110-CRA ≥110000 ≥758 ≥115000 ≥793

 

Group Material Science HRC
1 Martensitic stainless steel 32
2 Ferritic /austenitic stainless steel 36
3 Austenitic stainless steel 35

 

Executive Standard: Q/SY BG1032-2022
Steel Grade: SSCT65、SSCT80、SSCT90、SSCT110、SSCT125、316L、2205、2507、13Cr-80、Titanium Alloy
Wall Thickness of coiled tubing: 1.90mm-6.35mm
Outer Diameter of coiled tubing: 25.4mm-88.9mm
Length of single string: ≤8000m

 

Specification Range of Corrosion-resistant Alloyed Coiled Tubing

TOD inch 1″ 1.25″ 1.5″ 1.75″ 2″ 2.375″ 2.625″ 2.875″ 3.25″ 3.5″
inch mm 25.4 31.8 38.1 44.45 50.8 60.3 66.67 73.02 82.55 88.9
0.075″ 1.905 √ √
0.080″ 2.032 √ √
0.083″ 2.108 √ √
0.087″ 2.210 √ √ √
0.095″ 2.413 √ √ √ √
0.102″ 2.591 √ √ √ √
0.109″ 2.769 √ √ √ √ √ √
0.118″ 2.997 √ √ √ √ √ √
0.125″ 3.175 √ √ √ √ √ √
0.134″ 3.404 √ √ √ √ √ √ √ √
0.145#” 3.683 √ √ √ √ √ √ √ √
0.156″ 3.962 √ √ √ √ √ √ √ √ √
0.175″ 4.445 √ √ √ √ √ √ √ √ √
0.188″ 4.775 √ √ √ √ √ √ √ √
0.204″ 5.182 √ √ √ √ √ √ √ √
0.224″ 5.690 √ √ √ √ √ √ √
0.250″ 6.350 √ √ √ √ √ √ √

 

Chemical Composition

Element   C Si Mn P S Ni Cr Mo N
2205 Stainless steel 0.018 0.55 1.06 0.018 0.001 5.7 22.50 3.2 0.17
ASTM A240 Standard Min – – – – – 4.50 22.00 3.00 0.14
Max 0.030 1.00 2.00 0.030 0.020 6.50 23.00 3.50 0.20

 

Mechanical Properties

Property Yield Strength Rt0.5(MPa) Yield Load (t) Tensile Strength Rm(MPa) Fracture Load (t) Elongation Af(%)
2205 Stainless steel Coiled Tubing 610 16.9 782 21.5 36.3
Technical Requirement ≥552 ≥13.43 ≥655 ≥15.93 ≥25

 

Corrosion-Resistant Alloyed Coiled Tubing

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