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Casing Pipe

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  • Casing Pipe

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Casing Pipe
Oil casing is used to support the oil, gas wells of steel pipe, in order to ensure the drilling process and the completion of the entire well after the normal operation. Each well has several layers of casing depending on the drilling depth and geology. Casing down to use cement cementing, it and the tubing, drill pipe is different, can not be reused, a one-time consumption of materials. Therefore, the casing of the total consumption of more than 70% of the wells. Casing according to the use can be divided into: catheter, surface casing, casing technology and oil casing.

Special specifications can be customized according to customer requirements, please contact us to explain separately!

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PRODUCT DETELS

Casing SizeCasing CouplingNominal WeightInside Diameter
ODODLB/FTID
INCHINCHPPFINCH
4 1/2" (4.500)5.000"9.50      lb/ft (ppf)4.090"
5.000"10.50    lb/ft (ppf)4.052"
5.000"11.60    lb/ft (ppf)4.000"
5.000"13.50    lb/ft (ppf)3.920"
5"5.563"11.50    lb/ft (ppf)4.560"
5.563"13.00    lb/ft (ppf)4.494"
5.563"15.00    lb/ft (ppf)4.408"
5.563"18.00    lb/ft (ppf)4.276"
5 1/2" (5.500)6.050"14.00    lb/ft (ppf)5.012"
6.050"15.50    lb/ft (ppf)4.950"
6.050"17.00    lb/ft (ppf)4.892"
6.050"20.00    lb/ft (ppf)4.778"
6.050"23.00    lb/ft (ppf)4.670"
6 5/8" (6.625)7.390"20.00    lb/ft (ppf)6.049"
7.390"24.00    lb/ft (ppf)5.921"
7.390"28.00    lb/ft (ppf)5.791"
7.390"32.00    lb/ft (ppf)5.675"
7"7.656"17.00    lb/ft (ppf)6.538”
7.656"20.00    lb/ft (ppf)6.456"
7.656"23.00    lb/ft (ppf)6.366"
7.656"26.00    lb/ft (ppf)6.276"
7.656"29.00    lb/ft (ppf)6.184"
7.656"32.00    lb/ft (ppf)6.094"
7.656"35.00    lb/ft (ppf)6.004"
7.656"38.00    lb/ft (ppf)5.920"
7 5/8" (7.625)8.500“20.00    lb/ft (ppf)7.125"
8.500”24.00    lb/ft (ppf)7.025"
8.500"26.40    lb/ft (ppf)6.969"
8.500"29.70    lb/ft (ppf)6.875"
8.500"33.70    lb/ft (ppf)6.765"
8.500"39.00    lb/ft (ppf)6.625"
8 5/8" (8.625)9.625"24.00    lb/ft (ppf)8.097
9.625"28.00    lb/ft (ppf)8.017"
9.625"32.00    lb/ft (ppf)7.921"
9.625"36.00    lb/ft (ppf)7.825"
9.625"40.00    lb/ft (ppf)7.725"
9.625"44.00    lb/ft (ppf)7.625"
9.625"49.00    lb/ft (ppf)7.511"
9 5/8" (9.625)10.625"29.30    lb/ft (ppf)9.063"
10.625”32.30    lb/ft (ppf)9.001"
10.625“36.00    lb/ft (ppf)8.921"
10.625“40.00    lb/ft (ppf)8.835“
10.625”43.50    lb/ft (ppf)8.755”
10.62547.00    lb/ft (ppf)9.681”
10.62553.50    lb/ft (ppf)8.835"
10 3/4" (10.750)11.7532.75    lb/ft (ppf)10.192"
11.750”40.50    lb/ft (ppf)10.050“
11.750“45.50    lb/ft (ppf)9.950”
11.750”51.00    lb/ft (ppf)9.850”
11.750“55.50    lb/ft (ppf)9.760“
11.750”60.70    lb/ft (ppf)9.660”
11.750“65.70    lb/ft (ppf)9.560“
11 3/4" (11.750)12.750”42.00    lb/ft (ppf)11.084”
12.750“47.00    lb/ft (ppf)11.000“
12.750”54.00    lb/ft (ppf)10.880”
12.750“60.00    lb/ft (ppf)10.772“
13 3/8" (13.375)14.375"48.00    lb/ft (ppf)12.715”
14.375"54.50    lb/ft (ppf)12.615“
14.375"61.00    lb/ft (ppf)12.515”
14.375"68.00    lb/ft (ppf)12.415“
14.375"72.00    lb/ft (ppf)12.347"
16"17.000"65.00    lb/ft (ppf)15.250"
17.000"75.00    lb/ft (ppf)15.124"
17.000"84.00    lb/ft (ppf)15.010"
18 5/8" (13.375)20.000"87.50    lb/ft (ppf)17.755"
20"21.000"94.00    lb/ft (ppf)19.124"
21.000"106.50  lb/ft (ppf)19.000"
21.000"133.00  lb/ft (ppf)18.730"
21.000"169.00  lb/ft (ppf)18.376"

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Grades of Casing:

API 5CT J55/K55/N80/L80-1/L80-9Cr/L80-13Cr/P110/Q125/K55 D10/L80 D10


Sizes of Casing:

Diameter :from 4 1/2 inch  to 20 inch  （48.26mm - 508mm)

Nominal Weight: from 9.5 lb/ft  to 169 lb/ft

                           from 9.5 ppf  to 169 ppf

Lenght: R1, R2, R3


Types of Casing:

Seamless casing 

ERW casing

Casing nipple

Casing coupling


Coating

3PP Coating
3PE Coating
FBE Coating
Epoxy Coating
Special Painting


Applications: 

oil well extracting casing
borehole casing
borewell casing


Connection: 

BTC, STC, LTC, NUE, EUE


Dimension Tolerance of casing pipe

Types of steel tubes
Outer Diameter
Wall Thickness
Cold-rolled tubes
Tube sizes(mm)
Tolerances(mm)
Tolerances(mm)
＜114.3
±0.79
－12.5％
≥114.3
－0.5％，＋1％


Chemical Composition of casing pipe

StandardGradeChemical compositions（％）
API SPEC 5CT
J55
CSiMnPSCrNiCuMoV
K550.34～0.39
0.20～0.35
1.25～1.50
≤0.020
≤0.015
≤0.15
≤0.20
≤0.20
//
N80
0.34～0.38
0.20～0.35
1.45～1.70
≤0.020
≤0.015
≤0.15
///0.11～0.16
L80
0.15～0.22
≤1.00
0.25～1.00
≤0.020
≤0.010
12.0～14.0
≤0.20
≤0.20
//
P110
0.26～0.395
0.17～0.37
0.40～0.70
≤0.020
≤0.010
0.80～1.10
≤0.20
≤0.20
0.15～0.25
≤0.08


Mechanical properties of casing pipe

GradeTypeTotal elongation under load (%)
Yield strength (min)
Yield strength (max)
Tensile strength min Mpa
Hardness Max (HRC)
Hardness Max(HBW)
J55-0.5
379552517--
K55-0.5
379552655--
N8010.5
552758689--
N80Q0.5
552758689--
L8010.5
55265565523241
L80
9Cr0.5
55265565523241
L80
13Cr0.5
55265565523241
C90-0.5
62172468925.4255
C95-0.5
655758724--
T95-0.565575872425.4255
P110-0.6758965862--
Q125All0.658621034931--


Oil casing is used to support the oil, gas wells of steel pipe, in order to ensure the drilling process and the completion of the entire well after the normal operation. Each well has several layers of casing depending on the drilling depth and geology. Casing down to use cement cementing, it and the tubing, drill pipe is different, can not be reused, a one-time consumption of materials. Therefore, the casing of the total consumption of more than 70% of the wells. Casing according to the use can be divided into: catheter, surface casing, casing technology and oil casing.


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