SM13CRI-80 is a Martensitic OCTG material dedicated to Arctic environments. Martensitic stainless steels are suitable for sweet (CO₂) environments, under which standard Carbon and low alloy steels would suffer localized corrosion also called mesa or ringworm corrosion. In addition, SM13CRI-80 provides superior impact toughness resistance compared to API L80-13CR under extreme temperatures down to -60°C. SM13CRI benefits from SMI’s unrivaled know-how in manufacturing martensitic stainless steel since the 70’s and best-in-class quality control.

SM13CRI-80 is manufactured based on API 5CT / ISO 11960.

Diameters: 2-3/8” – 16"

Weights: as per API 5CT/ISO 11960

Special application: Please contact SMI engineer, should You require specific size, weight, drift, or any other characterization.

• Proprietary SM13CRI series. TGP-2898 (latest revision)
• API 5CT / ISO11960
• API RP 5C1 / ISO 10405
• API 5CRA  / ISO 13680
• VAM Book
• SMI Storage and handling procedure for CRA materials

CO₂ Corrosive well service, with temperatures down to -60°C.  Its primary function are Tubing and Liner applications, sections permanently exposed to production fluids.

SM13CRI-80 is typically fit for Arctic environments where storage, handling, and running conditions require superior impact toughness resistance compared to L80 13CR, at extreme low temperatures down to -60°C.

In operating downhole conditions , SM13CRI-80 CO₂ corrosion resistance is suitable up to 150°C.

SM13CRI-80 has limited SSC (Sulfide Stress Cracking) resistance and its usage shall be limited to sweet environment. In case SSC resistance is required, SM13CRS or higher grade material shall be considered.

Final material application will depend upon CO₂, Temperature, pH and expected Chlorides content.

In addition, compatibility with packer & completion fluids (brines and additives), matrix acidizing fluids, and scale dissolvers need to be ascertained.

For a more detailed assessment please contact SMI engineers.

(mass %)

 If lower temperature is required please contact SMI engineer.

Wet CO₂ corrosion mechanism (either as metal loss or localized corrosion) on CRA (Corrosion Resistant Alloy) materials is a temperature dependent phenomenon, increasing with higher temperatures.

Figure 1 below demonstrates the equivalent or better corrosion resistance of SM13CRI compared to conventional API L80-13CR across the temperature range :

 Furthermore, Figure 1 illustrates the impact of Chloride concentration on corrosion. With 5% NaCl and maximum recommended operating temperature of 150°C, SM13CRI still retains a corrosion rate below 0.5 mm/year.

Figure 2 summarizes the impact toughness evaluation of SM13CRI. It first demonstrates SM13CRI ductile-to-brittle transition safely below -100°C, while L80-13CR transition will spread over temperatures ranging from -50°C to 0°C.

Fig. 2 : Comparison of impact toughness properties on SM13CRI versus API L80-13CR.

Figure 2 also provides SM13CRI characterization in terms of impact toughness Charpy value or Asorbed Energy : It remains above 100 Joules down to its recommended minimum temperature of -60°C and beyond.

For additional information about material performances please contact SMI engineers.

Health, Safety and Environment

While state-of-the-art HSE rules are applied throughout SMI manufacturing process, proprietary and specific HSE regulations shall be applied along the life cycle of the pipe until it reaches its final position in the well, according to each operator’s rules. This particularly applies to all phases of handling and transportation, assembly on the rig floor, and rig return if applicable. OCTG are heavy and by nature unstable. Special care shall be paid to potential risks of injury whenever handling OCTGs. Walking on pipes shall be avoided at all times. Usage of Personal Protection Equipments (PPE) is mandatory. Equipment and procedures will be established to capture the possible wastes generated during maintenance (cleaning, coating, doping) and disposed according to local regulations. This applies in particular to storage dope, running dope, or cleaning water wastes.

Best practices for transportation, handling and storage of OCTG in general are covered by ISO 10405 / API RP5C1. VAM Book is also a good source of handling practices for VAM connections. In addition to these general rules, specific care is recommended pertaining to SM13CRI, because improper handling could affect the material performances and by extension the corrosion resistance:

• Prevention of Spot Hardening
• Prevention of Iron contamination
• Adapted storage equipments and inspection practices, particularly in a wet and saline atmosphere
• Adapted running equipments and practices
• Prevention of corrosion on rig returns, particularly in presence of completion fluids