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API 5ct k55 seamless steel casing tube
API 5ct k55 seamless steel casing tube
API 5ct k55 seamless steel casing tube
API 5ct k55 seamless steel casing tube

API 5ct k55 seamless steel casing tube

API 5CT Grade K55 Carbon Steel Seamless Tubings are carbon steel pipes, strictly manufactured as per API (AMERICAN PETROLEUM INSTITUTE) to meet the clients requirements. API 5CT Grade K55 carbon steel tubings are provided with multiple end connections like non-Upset ends and External Upset Ends.
Product introduction
API-5CT K55 oilfield casing pipe is very similar to J55, there is no significant difference in the chemical composition
and yield strength, however the ultimate tensile strength  of K55 is higher than J55 steel, K55/J55 are 655MPa and
517MPa respectively.

K55 has better mechanical and thermal fatigue resistance and crack resistance than J55. For a thermal production well,
the heavy wall K55 casing is appropriate instead of J55 casing. The former has a better thermal fatigue resistance property
than the latter.

Inspection
Physical properties are checked and each length hydrostatically tested, normally to only 3,000 psi in the plain end (unthreaded) condition.
The following are also checked:
Dimensions
Weights
Straightness
Lengths
Part of this inspection is to drift all lengths.
Despite all the American Petroleum Institute (API) specifications and testing, some tubing defects are still found after delivery; thus, some operators
do further inspection.

Inspection Method:
Size and surface inspection
NDT and pressure test and third party certication
Hydrostatic
Drifting test
Physical and chemicail analysis
Hardness and pressure test.
Electromagnetic
Magnetic particle
Ultrasonic
 
Technical data
Dimensions And Weight
Size Weight Outside Diameter Wall Thickness End Finish
Grade
in mm in mm J55K55 L80 N80 C90T95 P110
4 1/2 9.50 4.500 114.3 0.205 5.21 PS
10.50 0.224 5.69 PSB
11.60 0.250 6.35 PSLB PLB PLB PLB PLB
13.50 0.290 7.37 PLB PLB PLB PLB
15.10 0.337 9.56 PLB
5 11.50 5.00 127.00 0.220 5.59 PS
13.00 0.253 6.43 PSLB
15.00 0.296 7.52 PSLB PLB PLB PLBE PLB
18.00 0.362 9.19 PLB PLB PLBE PLB
21.40 0.437 11.10 PLB PLB PLB PLB
23.20 0.478 12.14     PLB  
24.10 0.500 12.70     PLB  
5 1/2 14.00 5.500 139.7 0.244 6.20 PS
15.50 0.275 6.98 PSLB
17.00 0.304 7.72 PSLB PLB PLB PLBE PLB
20.00 0.361 9.17 PLB PLB PLBE PLB
23.00 0.415 10.54 PLB PLB PLBE PLB
6 5/8 20.00 6.625 168.28 0.288 7.32 PSLB
24.00 0.352 8.94 PSLB PLB PLB PLBE PLB
28.00 0.417 10.59 PLB PLB PLBE PLB
32.00 0.475 12.06 PLB PLB PLBE PLB
7 17.00 7.00 177.80 0.231 5.87
20.00 0.272 6.91 PS
23.00 0.317 8.05 PSLB PLB PLB PLBE
26.00 0.362 9.19 PSLB PLB PLB PLBE PLB
29.00 0.408 10.36 PLB PLB PLBE PLB
32.00 0.453 11.51 PLB PLB PLBE PLB
35.00 0.498 12.65 PLB PLB PLBE PLB
38.00 0.540 13.72 PLB PLB PLBE PLB
7 5/8 24.00 7.625 193.68 0.300 7.62
26.40 0.328 8.33 PSLB PLB PLB PLBE PLB
29.70 0.375 9.52 PLB PLB PLBE PLB
33.70 0.430 10.92 PLB PLB PLBE PLB
39.00 0.500 12.70 PLB PLB PLBE PLB
42.80 0.562 14.27 PLB PLB PLB PLB
45.30 0.595 15.11 PLB PLB PLB PLB
47.10 0.625 15.88 PLB PLB PLB PLB
8 5/8 24.00 8.625 219.08 0.264 6.71 PS
28.00 0.304 7.72
32.00 0.352 8.94 PSLB
36.00 0.400 10.16 PSLB PLB PLB PLBE PLB
40.00 0.450 11.43 PLB PLB PLBE PLB
44.00 0.500 12.70 PLB PLB PLBE PLB
49.00 0.557 14.15 PLB PLB PLBE PLB
9 5/8 32.30 9.625 244.48 0.312 7.92
36.00 0.352 8.94 PSLB
40.00 0.395 10.03 PSLB PLB PLB PLBE
43.50 0.435 11.05 PLB PLB PLBE PLB
47.00 0.472 11.99 PLB PLB PLBE PLB
53.50 0.545 13.84 PLB PLB PLBE PLB
58.40 0.595 15.11 PLB PLB PLB PLB
10 3/4 32.75 10.75 273.05 0.279 7.09
40.50 0.350 8.89 PSB
15.50 0.400 10.16 PSB
51.00 0.450 11.43 PSB PSB PSB PSBE PSB
55.50 0.495 12.57 PSB PSB PSBE PSB
60.70 0.545 13.84 PSBE PSB
65.70 0.595 15.11 PSB PSB
13 3/8 48.00 13.375 339.73 0.330 8.38
54.50 0.380 9.65 PSB
61.00 0.430 10.92 PSB
68.00 0.480 12.19 PSB PSB PSB PSB PSB
72.00 0.514 13.06 PSB PSB PSB PSB
16 65.00 16 406.40 0.375 9.53
75.00 0.438 11.13 PSB
84.00 0.495 12.57 PSB
109.00 0.656 16.66 P P P P
18 5/8 87.50 18.625 473.08 0.435 11.05 PSB
20 94.00 20 508.00 0.438 11.13 PSLB
106.50 0.500 12.70 PSLB
133.00 0.635 16.13 PSLB
 
Chemical Properties
Carbon Silicon Manganese Phosphorous Sulphur Molybdenum Nickel Chromium Copper Others
0.03 0.03
 
Mechanical Properties
Yield Strength Tensile Strength Elongation A5 min
MPa min ksi min MPa min MPa min ksi min Percentage
    655 95

 
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