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API 5CT casing pipe
API 5CT casing pipe
API 5CT casing pipe
API 5CT casing pipe

API 5CT casing pipe

Casing is large diameter pipe that is assembled and inserted into a recently drilled section of a borehole and typically held into place with cement. And we provide various Seamless Casing from 4-1/2’’-20’’ in grade H40, J55, K55, N80, L80, C95, P110 etc.
Product introduction
Casing is large diameter pipe that is assembled and inserted into a recently drilled section of a borehole and typically
held into place with cement. And we provide various Seamless Casing from 4-1/2’’-20’’ in grade H40, J55, K55,
N80, L80, C95, P110 etc. The Casing length range is R1, R2, R3, with threads of BTC, LTC, STC. According to the strength
of steel casing can be divided into different steel grade, deep well, using different steel grade. In corrosive environment
also requires the casing itself has corrosion resistance. In the complicated geologic condition place also asked the casing
having an anti-collapse performance.
 
Product Name API Spec 5CT Casing Pipe
Material H40 J55 K55 N80 M65 L80 L8013CR C90 C95 T95 P110 Q125 V150
Technique Seamless/EW
Standard API 5CT
Out Diameter (OD) 114.3-508mm
Wall Thickness (WT) 5.21-22.22mm
Norminal Weight 9.5-133.0(Ib/ft)
Length R1 (5.49-6.71m), R2 (8.23-9.14m), R3 (11.58-13.72m) or as customer's requirements
Coupling BTC, STC, LTC, NUE, EUE, VAM, BU or no thread
Usage Oil/Gas Drilling
 
Outer Diameter Wall Thickness Thread Length
in mm kg/m lb/ft
4 1/2" 114.3 14.14-22.47 9.50-15.10 LTC/STC/BTC R1/R2/R3
5" 127 17.11-35.86 11.50-24.10 LTC/STC/BTC R1/R2/R3
5 1/2" 139.7 20.83-34.23 14.00-23.00 LTC/STC/BTC R1/R2/R3
6 5/8" 168.28 29.76-35.72 20.00-24.00 LTC/STC/BTC R1/R2/R3
7" 177.8 25.30-56.55 17.00-38.00 LTC/STC/BTC R1/R2/R3
7 5/8" 193.68 35.72-63.69 24.00-42.80 LTC/STC/BTC R1/R2/R3
8 5/8" 219.08 35.72-72.92 24.00-49.00 LTC/STC/BTC R1/R2/R3
9 5/8" 244.48 48.07-86.91 32.30-58.40 LTC/STC/BTC R1/R2/R3
10 3/4" 273.05 48.73-97.77 32.75-65.70 LTC/STC/BTC R1/R2/R3
11 3/4" 298.45 62.50-89.29 42.00-60.00 LTC/STC/BTC R1/R2/R3
13 3/8" 339.72 71.43-107.15 48.00-72.00 LTC/STC/BTC R1/R2/R3
16'' 406.4 96.73-162.21 65.00-109.00 LTC/STC/BTC R1/R2/R3
18 5/8'' 473.08 130.21 87.50 LTC/STC/BTC R1/R2/R3
20'' 508 139.89-197.93 94.00-133.00 LTC/STC/BTC R1/R2/R3
Technical data
Chemical Composition
Group Grade Type C Mn Mo Cr Ni max. Cu max. P max. S max. Si max.
min. max. min. max. min. max. min. max.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 H40 - - - - - - - - - - - 0.03 0.03 -
J55 - - - - - - - - - - - 0.03 0.03 -
K55 - - - - - - - - - - - 0.03 0.03 -
N80 1 - - - - - - - - - - 0.03 0.03 -
N80 Q - - - - - - - - - - 0.03 0.03 -
R95 - - 0.45 c - 1.9 - - - - - - 0.03 0.03 0.45
2 M65 - - - - - - - - - - - 0.03 0.03 -
  L80 1 - 0.43 a - 1.9 - - - - 0.25 0.35 0.03 0.03 0.45
  L80 9Cr - 0.15 0.3 0.6 0.9 1.1 8 10 0.5 0.25 0.02 0.01 1
  L80 13Cr 0.15 0.22 0.25 1 - - 12 14 0.5 0.25 0.02 0.01 1
  C90 1 - 0.35 - 1.2 0.25 b 0.85 - 1.5 0.99 - 0.02 0.01 -
  T95 1 - 0.35 - 1.2 0.25 d 0.85 0.4 1.5 0.99 - 0.02 0.01 -
  C110 - - 0.35 - 1.2 0.25 1 0.4 1.5 0.99 - 0.02 0.005 -
3 P110 e - - - - - - - - - - 0.030 e 0.030 e -
4 Q125 1 - 0.35   1.35 - 0.85 - 1.5 0.99 - 0.02 0.01 -
a The carbon content for L80 may be increased up to 0.50 % maximum if the product is oil-quenched. 
b The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the wall thickness is less than 17.78 mm. 
c The carbon content for R95 may be increased up to 0.55 % maximum if the product is oil-quenched. 
d The molybdenum content for T95 Type 1 may be decreased to 0.15 % minimum if the wall thickness is less than 17.78 mm. 
e For EW Grade P110, the phosphorus content shall be 0.020 % maximum and the sulfur content 0.010 % maximum. 
NL = no limit. Elements shown shall be reported in product analysis.
 

 Mechanical Properties

Standard Type Tensile Strength
MPa
Yield Strength
MPa
Hardness
Max.
API SPEC 5CT J55 ≥517 379 ~ 552 ----
K55 ≥517 ≥655 ---
N80 ≥689 552 ~ 758 ---
L80(13Cr) ≥655 552 ~ 655 ≤241HB
P110 ≥862 758 ~ 965 ----
 
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