API Casing Pipes, are the core pipe material in the field of oil and gas extraction. Carefully manufactured according to API standards, they have excellent strength, sealing, and corrosion resistance. From deep well drilling to complex geological environments, providing stable support for oil well structures and ensuring safe and efficient mining operations is a key pipeline component in energy extraction engineering.
| Standard | API Standard |
Outside Diameter | 114-508mm |
| Wall Thickness | 5.2-16.2mm |
| Length | 6-12m, or other length as request |
Parameter of API Casing Pipes
| Standard | API Standard |
| API 5CT J55,N80-1,V80-Q;L80-1;L80-9Cr;L80-13Cr;C90;C95;P110,Q125 | |
| Gread | J55;K55;N80-Q;L80-1;L80-9Cr;L80-13Cr,C95,P10 |
| Size | Wall Thickness: 5-16mm |
| Outside Diameter: 114-508mm | |
| Length: 6-12m, or other length as request | |
| Materials | H40, J55, K55, N80, L80, C90,T95 and P110 |
| Thread type | STC;LTC;BTC;VAM TOP equivalent;New VAM equivalent;CS equivalent;HSC equivalent;NUE;EUE;LTC;XC |
| Production technology | Plain pipe-end upsetting- Austenite treatment-Quenching-Tempering-straightening-(Non-Destructive Testing)- Threading-Thread inspection-coupling MPI-phosphating-Coupling make up-Drifting-Hydrostatic testing-Measuring&Weight-Marking&Stenciling-Coating-Packing Casing and tubing-Transportation |
| vailable Sizes | Category: ERW, HFW or SMLS |
| Standards:H-40, J-55, K-55, C-75, L-80, N-80, C-95, AS-95, P-110, L80-13CR | |
| Steel Grade: H40, J55, K55, N80 | |
| Connections | API 5CT is applicable to following connections which complied with API SPEC 5B: • SC: Short round thread casing • LC: Long ound thread casing • BC: Buttress thread casing • NU: Non-upset tubing • EU: External upset tubin |
| Application | Casing Pipe is widely used for fastening oil and gas well wall or borehold, with bigger diameter than tubing, including surface casings, technical casings and oil layer casings. |
Technical parameters of casing pipe:
| Sizes | OD D mm | Weight kg/m | WT t mm | Type of end | ||||||||
| H40 | J55 K55 | M65 | L80 C95 | N80 1、Q | C90 T95 | P110 | Q125 | |||||
| 1 | 2 | |||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 4-1/2 4-1/2 4-1/2 4-1/2 4-1/2 | 9.50 10.50 11.60 13.50 15.10 | 114.30 114.30 114.30 114.30 114.30 | 14.14 15.63 17.26 20.09 22.47 | 5.21 5.69 6.35 7.37 8.56 | PS – – – – | PS PSB PSLB – – | PS PSB PLB PLB – | – – PLB PLB – | – – PLB PLB – | – – PLB PLB – | – – PLB PLB PLB | – – – – PLB |
| 5 5 5 5 5 5 5 | 11.50 13.00 15.00 18.00 21.40 23.20 24.10 | 127.00 127.00 127.00 127.00 127.00 127.00 127.00 | 17.11 19.35 22.32 26.79 31.85 34.53 35.86 | 5.59 6.43 7.52 9.19 11.10 12.14 12.70 | – – – – – – – | PS PSLB PSLBE – – – – | PS PSLB PLB PLB PLB – – | – – PLBE PLBE PLB PLB PLB | – – PLBE PLBE PLB PLB PLB | – – PLBE PLBE PLB PLB PLB | – – PLBE PLBE PLB PLB PLB | – – – PLBE PLB PLB PLB |
| Sizes | OD D mm | Weight kg/m | WT t mm | Type of end | ||||||||
| H40 | J55 K55 | M65 | L80 C95 | N80 1、Q | C90 T95 | P110 | Q125 | |||||
| 1 | 2 | |||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 | 14.00 15.50 17.00 20.00 23.00 26.80 29.70 32.60 35.30 38.00 40.50 43.10 | 139.70 139.70 139.70 139.70 139.70 139.70 139.70 139.70 139.70 139.70 139.70 139.70 | 20.83 23.07 25.30 29.76 34.23 39.88 44.20 48.51 52.53 56.55 60.27 64.14 | 6.20 6.98 7.72 9.17 10.54 12.70 14.27 15.88 17.45 19.05 20.62 22.22 | PS – – – – – – – – – – – | PS PSLBE PSLBE – – – – – – – – – | PS PSLB PLB PLB PLB – – – – – – – | – – PLBE PLBE PLBE – – – – – – – | – – PLBE PLBE PLBE – – – – – – – | – – PLBE PLBE PLBE P P P P P P P | – – PLBE PLBE PLBE – – – – – – – | – – – – PLBE – – – – – – – |
| 6-5/8 6-5/8 6-5/8 6-5/8 | 20.00 24.00 28.00 32.00 | 168.28 168.28 168.28 168.28 | 29.76 35.72 41.67 47.62 | 7.32 8.94 10.59 12.06 | PS – – – | PSLB PSLBE – – | PSLB PLB PLB – | – PLBE PLBE PLBE | – PLBE PLBE PLBE | – PLBE PLBE PLBE | – PLBE PLBE PLBE | – – – PLBE |
| 7 7 7 7 7 7 7 | 17.00 20.00 23.00 26.00 29.00 32.00 35.00 | 177.80 177.80 177.80 177.80 177.80 177.80 177.80 | 25.30 29.76 34.23 38.69 43.16 47.62 52.09 | 5.87 6.91 8.05 9.19 10.36 11.51 12.65 | PS PS – – – – – | – PS PSLBE PSLBE – – – | – PS PLB PLB PLB PLB – | – – PLBE PLBE PLBE PLBE PLBE | – – PLBE PLBE PLBE PLBE PLBE | – – PLBE PLBE PLBE PLBE PLBE | – – – PLBE PLBE PLBE PLBE | – – – – – – PLBE |
| 7 7 7 7 7 7 | 38.00 42.70 46.40 50.10 53.60 57.10 | 177.80 177.80 177.80 177.80 177.80 177.80 | 56.55 63.54 69.05 74.56 79.77 84.97 | 13.72 15.88 17.45 19.05 20.62 22.22 | – – – – – – | – – – – – – | – – – – – – | PLBE – – – – – | PLBE – – – – – | PLBE P P P P P | PLBE – – – – – | PLBE – – – – – |
| 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8 | 24.00 26.40 29.70 33.70 39.00 42.80 45.30 47.10 51.20 55.30 | 193.68 193.68 193.68 193.68 193.68 193.68 193.68 193.68 193.68 193.68 | 35.72 39.29 44.20 50.15 58.04 63.69 67.41 70.09 76.19 82.30 | 7.62 8.33 9.52 10.92 12.70 14.27 15.11 15.88 17.45 19.05 | PS – – – – – – – – – | – PSLBE – – – – – – – – | – PSLB PLB PLB – – – – – – | – PLBE PLBE PLBE PLBE PLB PLB PLB – – | – PLBE PLBE PLBE PLBE PLB PLB PLB – – | – PLBE PLBE PLBE PLBE PLB PLB PLB P P | – – PLBE PLBE PLBE PLB PLB PLB – – | – – – – PLBE PLB PLB PLB – – |
| 7-3/4 | 46.10 | 196.85 | 68.60 | 15.11 | – | – | – | P | P | P | P | P |
| 8-5/8 8-5/8 8-5/8 8-5/8 8-5/8 8-5/8 8-5/8 | 24.00 28.00 32.00 36.00 40.00 44.00 49.00 | 219.08 219.08 219.08 219.08 219.08 219.08 219.08 | 35.72 41.67 47.62 53.57 59.53 65.48 72.92 | 6.71 7.72 8.94 10.16 11.43 12.70 14.15 | – PS PS – – – – | PS – PSLBE PSLBE – – – | PS PS PSLB PSLB PLB – – | – – – PLBE PLBE PLBE PLBE | – – – PLBE PLBE PLBE PLBE | – – – PLBE PLBE PLBE PLBE | – – – – PLBE PLBE PLBE | – – – – – PLBE |
| 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 | 32.30 36.00 40.00 43.50 47.00 53.50 58.40 59.40 64.90 70.30 75.60 | 244.48 244.48 244.48 244.48 244.48 244.48 244.48 244.48 244.48 244.48 244.48 | 48.07 53.57 59.53 64.73 69.94 79.62 86.91 88.40 96.58 104.62 112.50 | 7.92 8.94 10.03 11.05 11.99 13.84 15.11 15.47 17.07 18.64 20.24 | PS PS – – – – – – – – – | – PSLB PSLBE – – – – – – – – | – PSLB PSLB PLB PLB – – – – – | – – PLBE PLBE PLBE PLBE PLB – – – – | – – PLBE PLBE PLBE PLBE PLB – – – – | – – PLBE PLBE PLBE PLBE PLB P P P P | – – – PLBE PLBE PLBE PLB – – – – | – – – – PLBE PLBE PLB – – – – |
| 10-3/4 10-3/4 10-3/4 10-3/4 10-3/4 10-3/4 10-3/4 | 32.75 40.50 45.50 51.00 55.50 60.70 65.70 | 273.05 273.05 273.05 273.05 273.05 273.05 273.05 | 48.74 60.27 67.71 75.90 82.59 90.33 97.77 | 7.09 8.89 10.16 11.43 12.57 13.84 15.11 | PS PS – – – – – | – PSB PSBE PSBE – – – | – PSB PSB PSB PSB – – | – – – PSBE PSBE – – | – – – PSBE PSBE – – | – – – PSBE PSBE PSBE PSB | – – – PSBE PSBE PSBE PSB | – – – – – PSBE PSB |
| 10-3/4 10-3/4 10-3/4 | 73.20 79.20 85.30 | 273.05 273.05 273.05 | 108.93 117.86 126.94 | 17.07 18.64 20.24 | – – – | – – – | – – – | – – – | – – – | P P P | – – – | – – – |
| 11-3/4 11-3/4 11-3/4 11-3/4 11-3/4 11-3/4 | 42.00 47.00 54.00 60.00 65.00 71.00 | 298.45 298.45 298.45 298.45 298.45 298.45 | 62.50 69.94 80.36 89.29 96.73 105.66 | 8.46 9.53 11.05 12.42 13.56 14.78 | PS – – – – – | – PSB PSB PSB – – | – PSB PSB PSB – – | – – – PSB P P | – – – PSB P P | – – – PSB P P | – – – PSB P P | – – – PSB P P |
| 13-3/8 13-3/8 13-3/8 13-3/8 13-3/8 | 48.00 54.50 61.00 68.00 72.00 | 339.72 339.72 339.72 339.72 339.72 | 71.43 81.10 90.78 101.19 107.15 | 8.38 9.65 10.92 12.19 13.06 | PS – – – – | – PSB PSB PSB – | – PSB PSB PSB – | – – – PSB PSB | – – – PSB PSB | – – – PSB PSB | – – – PSB PSB | – – – – PSB |
| 16 16 16 16 | 65.00 75.00 84.00 109.00 | 406.40 406.40 406.40 406.40 | 96.73 111.61 125.01 162.21 | 9.53 11.13 12.57 16.66 | PS – – – | – PSB PSB P | – PSB PSB – | – – – P | – – – P | – – – – | – – – P | – – – P |
| 18-5/8 | 87.50 | 473.08 | 130.21 | 11.05 | PS | PSB | PSB | – | – | – | – | – |
| 20 20 20 | 94.00 106.50 133.00 | 508.00 508.00 508.00 | 139.89 158.49 197.93 | 11.13 12.70 16.13 | PSL – – | PSLB PSLB PSLB | PSLB PSLB – | – – – | – – – | – – – | – – – | – – – |
| Remarks: P——Plain end;S—Short round thread;L—Long round thread;B—Buttress thread;E—Extreme-line. | ||||||||||||
Features of API Casing Pipes
API casing pipes possess excellent strength performance and can endure huge axial loads, radial pressures and various complex stresses from the formation.
They have outstanding sealing performance and can effectively prevent fluid channeling between different formations and the leakage of liquids and gases in the oil well.
During the process of oil and gas exploration, as casing pipes will be exposed to various corrosive media, API casing pipes have relatively strong corrosion resistance.
Being produced in strict accordance with API standards, API casing pipes have strict requirements and guarantees in terms of dimensional accuracy. Casing pipes of the same specification have a high degree of interchangeability, which is extremely important in large-scale oil drilling projects.
The connection method of API casing pipes is carefully designed and strictly tested, having a relatively high connection reliability. Its threaded connection can not only achieve a good sealing effect but also ensure that it will not become loose or disengaged when subjected to relatively large tensile forces, pressures and torques.
Industries Using Steel
