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 |
