Puyang Zhongshi Group Co., Ltd.
Puyang Zhongshi Group Co., Ltd.
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Alloy Steel Grade J55 K55 L80 N80 P110 P11013Cr Seamless Casing Pipe In Oilfield
Oil casing descriptions:
Oil casing is a large diameter seamless pipe that is assembled and inserted into the drilled section of the
borehole and typically held into place with cement.
Puyang Zhongshi Group provide various seamless casing from 4-1/2’’-20’’ with steel grade J55,K55,N80,
L80,P110 etc. The Casing pipe length range is R1,R2,R3, with threads of BTC, LTC, STC.
According to the strength of steel, casing pipe steel can be divided into different steel grades. Different
steel grade is used in oil well with different well depth. In corrosive environment also requires the casing
itself has corrosion resistance. In the complicated geologic condition place also asked the casing
having a anti-collapse performance.
Features:
1. 4 1/2”-20” seamless casing
2. Hot rolled pipe
Technical specification:
| Outside Diameter | Wall Thickness | Grade | Thread | ||
| Inch | mm | kg/m | Ib/ft | ||
| 4 1/2'' | 114.3 | 14.14-22.47 | 9.50-15.10 | J55/K55/N80/L80/P110 | STC/LTC/BTC |
| 5'' | 127 | 17.11-35.86 | 11.50-24.10 | J55/K55/N80/L80/P111 | STC/LTC/BTC |
| 5 1/2'' | 139.7 | 20.83-64.14 | 14.00-43.10 | J55/K55/N80/L80/P112 | STC/LTC/BTC |
| 6 5/8'' | 168.28 | 29.76-47.62 | 20.00-32.00 | J55/K55/N80/L80/P113 | STC/LTC/BTC |
| 7'' | 177.8 | 25.30-84.98 | 17.00-57.10 | J55/K55/N80/L80/P114 | STC/LTC/BTC |
| 7 5/8'' | 193.68 | 35.72-82.30 | 24.00-55.30 | J55/K55/N80/L80/P115 | STC/LTC/BTC |
| 8 5/8'' | 219.08 | 35.72-72.92 | 24.00-49.00 | J55/K55/N80/L80/P116 | STC/LTC/BTC |
| 9 5/8'' | 244.48 | 48.07-112.51 | 32.30-75.60 | J55/K55/N80/L80/P117 | STC/LTC/BTC |
| 10 3/4'' | 273.05 | 48.74-126.94 | 32.75-85.30 | J55/K55/N80/L80/P118 | STC/LTC/BTC |
| 11 3/4'' | 298.45 | 62.50-105.66 | 42.00-71.00 | J55/K55/N80/L80/P119 | STC/LTC/BTC |
| 13 3/8'' | 339.73 | 71.43-107.15 | 48.00-72.00 | J55/K55/N80/L80/P120 | STC/LTC/BTC |
| 16'' | 406.4 | 96.73-162.21 | 65.00-109.00 | J55/K55/N80/L80/P121 | STC/LTC/BTC |
| 18 5/8'' | 473.08 | 130.22 | 87.5 | J55/K55/N80/L80/P122 | STC/LTC/BTC |
| 20'' | 508 | 139.89-197.93 | 94.00-133.00 | J55/K55/N80/L80/P123 | STC/LTC/BTC |
Mechanical Properties:
| Standard | Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) | Hardness |
| API SPEC 5CT | J55 | ≥517 | 379~552 | 0.5 | |
| K55 | ≥655 | 379~552 | 0.5 | ||
| N80 | ≥689 | 552~758 | 0.5 | ||
| L80 | ≥655 | 552~655 | 0.5 | ≤241HB | |
| P110 | ≥862 | 758~965 | 0.5 |
