Downhole casing and production tubing (OCTG)

Downhole casing and production tubing in CRA (corrosion resistant alloys) such as duplex stainless steels and nickel alloys. These materials are ideal to cope with the aggressive environments found in wells sour from hydrogen sulphide, carbon dioxide and other chemicals.

Predominantly, Sandvik's downhole casing and production tubing is supplied in the cold-worked condition to ensure high strength despite its low weight.

Sandvik carries four different grades of downhole casing and production tubing. Please contact us for a reference list for Sandvik production tubulars.

List of materials (other grades can be offered on request)
Sandvik gradeGrade description
Sandvik SAF 2205
(22Cr, UNS S31803/ S32205)
Sandvik SAF 2205 / 22Cr is a duplex stainless steel, which is resistant to CO2 -corrosion and to sour corrosion at low partial pressures of H2S.
Sandvik SAF 2507
(25Cr, UNS S32750)
Sandvik SAF 2507 / 25Cr is a super-duplex stainless steel similar to Sandvik SAF 2205 / 22Cr, but with slightly improved H2S resistance and significantly higher resistance to chloride-induced corrosion.
Sanicro 28
(UNS N08028)
Sanicro 28 is a high alloy stainless steel comparable with Alloy 825. It has excellent resistance to corrosion in severe downhole environments, especially to high partial pressures of H2S and high chloride contents.
Sanicro 29 For very high chloride contents in combination with high partial pressures of H2S. Sanicro 29 provides even better resistance to localised corrosion and sulphide stress cracking compared to Sanicro 28.
Mechanical properties at ambient temperature
Sandvik grade*Yield strength
ksi
0.2% offset
Tensile
strength
min ksi
Elongation
min %
Hardness
HRC
max
Sandvik SAF 2205 / 22Cr 75–100 95 25 28
130–160 140 10 36
Sandvik SAF 2507 / 25Cr (min.) 80 116 25 32
Sanicro 28 110–140 115 12 32
125–145 130 10 35
Sanicro 29 110-140 115 12 35
125-145 130 10 37

*All grades are included in NACE MR 01–75 and ISO 15156.

Sizes downhole tubulars
OD
in.
WT
in.
Nominal weight
lb/ft
ID
in.
Drift dia.
in.
2 7/8 0.217 6.50 2.441 2.347
2 7/8 0,267 7.90 2.323 2.229
2 7/8 0.308 8.70 2.259 2.165
2 7/8 0.340 9.50 2.195 2.101
2 7/8 0.405 11.0 2.065 1.971
2 7/8 0.440 11.65 1.995 1.901
3 1/2 0.254 9.30 2.991 2.867
3 1/2 0.289 10.30 2.922 2.797
3 1/2 0.375 12.95 2.750 2.625
3 1/2 0.476 15.80 2.548 2.423
3 1/2 0.510 16.70 2.248 2.355
4 0.262 11.00 3.476 3.351
4 0.330 13.40 3.340 3.215
4 1/2 0.271 12.75 3.958 3.833
4 1/2 0.290 13.50 3.920 3.795
4 1/2 0.337 15.10 3.826 3.701
4 1/2 0.373 16.60 3.754 3.629
4 1/2 0.430 18.80 3.640 3.515
4 1/2 0.500 21.40 3.500 3.375
5 0.253 13.00 4.494 4.369
5 0.296 15.00 4.408 4.283
5 0.362 18.00 4.276 4.151
5 0.422 20.80 4.156 4.031
5 0.478 23.20 4.044 3.919
5 0.500 24.10 4.000 3.875
6 5/8 0.288 20.00 6.049 5.924
6 5/8 0.330 23.20 5.965 5.840
6 5/8 0.352 24.00 5.921 5.796
6 5/8 0.417 28.00 5.791 5.666
7 0.272 20.00 6.456 6.331
7 0.317 23.00 6.366 6.241
7 0.362 26.00 6.276 6.151
7 0.408 29.00 6.184 6.059
7 0.453 32.00 6.094 5.969
7 0.498 35.00 6.004 5.879