Grades:

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


Sizes:

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:

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

Standard Grade Chemical compositions(%)
API SPEC 5CT
J55
C Si Mn P S Cr Ni Cu Mo V
K55 0.34~0.39
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

Grade Type Total elongation under load (%)
Yield strength (min)
Yield strength (max)
Tensile strength min Mpa
Hardness Max (HRC)
Hardness Max(HBW)
J55 - 0.5
379 552 517 - -
K55 - 0.5
379 552 655 - -
N80 1 0.5
552 758 689 - -
N80 Q 0.5
552 758 689 - -
L80 1 0.5
552 655 655 23 241
L80
9Cr 0.5
552 655 655 23 241
L80
13Cr 0.5
552 655 655 23 241
C90 - 0.5
621 724 689 25.4 255
C95 - 0.5
655 758 724 - -
T95 - 0.5 655 758 724 25.4 255
P110 - 0.6 758 965 862 - -
Q125 All 0.65 862 1034 931 - -

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.

Casing Size Casing Coupling Nominal Weight Inside Diameter
OD
OD LB/FT ID
INCH
INCH PPF INCH
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”
10.625
47.00    lb/ft (ppf) 9.681”
10.625
53.50    lb/ft (ppf) 8.835"
10 3/4" (10.750) 11.750 32.75    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"



Mexico
L80 EUE
3 1/2" 9.3ppf
80,000 Meters
Columbia
J-55 (or K-55)
20",94.0 LB/FT, BTC, R3
10500 feet
UAE
K-55,N80
13-3/8", 68 ppf SMLS, BTC, R3
9-5/8", 47 ppf SMLS, BTC, R3
9560 meters

Nigeria
N80
9-5/8" 47lb/ft R1
105000 feet(project)

United States
P110,J55
Ø 339,72 х 13,06 mm R3
Ø 426 х 10 mm, BTC,R3
2077 Tons

Zambia
API GRADE L-80,SEAMLESS
7 IN.35 PPF DRIFT :5.875 IN 
6000 Joints
Nigeria
AISI 4140 L80
10-3/4", 40.50PPF 30 FEET LONG
2000 Nos
Jordan
H- 40
14" O.D,45.61 Ib/ft, Range II, wt:0,312"
2700 meters



Couple part is loose.

                                                                                                                                                                    ___Owen(Qatar)

Casing is beautiful, thanks!

                                                                                                                                                                    ___Lowell (Romania)

Delivery is fast even shortens a few days.

                                                                                                                                                                    ___Smith (Azerbaijan)   

Quality is nice and I want to order another 360 tons from the company.

                                                                                                                                                                    ___Mason (Singapore)

Sales is very professional, good.

                                                                                                                                                                     ___Ivan (Ukraine)