Product Main

Quick Details

Place of Origin: China (Mainland)
Brand Name: dalipal
Model Number: 139.7*6.02mm
Certification: API
Material: Carbon Steel
Packaging Details: 1)Bundle by steel belts with protect of both end. 2)Threads of both ends with protectors 3)Coupling

Specifications

API 5CT N80 Casing Pipe|Olifield Casing Pipe

 

API-5CT N80 oilfield casing pipe contains N80-1 and N80-Q types. Those two materials are absolutely consistent regarding the chemical composition and mechanical attributes, they are just various in the heat treatment.

During heat treatment, N80-1 steel is treated by normalizing and tempering, while N80Q steel is treated by quenching and tempering. Therefore, the collapsing strength and internal pressure strength of N80Q are higher than that of N80-1. N80-1 or N80Q should be clearly shown by the designer when N80 casing is selected.

As its mechanical properties are higher than J55 and K55 types, it may very well be utilized to certain a little more challenging formations. With deeper downhole depth than J55 and K55 types, it can be applied for the exploitation of middle-level oil and gas.

Due to the high capability of N80 material, those API-5CT casing pipes are broadly applied in natural gas as well as coal bed methane extraction, and geothermal wells.

 

Parameterrs Value
Material N80 Steel Grade
Outer Diameter 4-1/2"~20" (114.3~508mm)
Wall Thickness 5.21~16.13mm
Forms of Thread BTC, LTC, STC and premium connection
Length Range R1(6.10-7.32m), R2(8.53-9.75m), R3(11.58-12.8m)

 

Certificate:
API 5CT,Russian Certificate,ISO,CCS


Packing:
Coating and steel thread protector

Inspection

Physical properties are checked and each length hydrostatically tested, normally to only 3,000 psi in the plain end (unthreaded) condition. The following are also checked:

  • Dimensions
  • Weights
  • Straightness
  • Lengths

Part of this inspection is to drift all lengths.
Despite all the American Petroleum Institute (API) specifications and testing, some tubing defects are still found after delivery; thus, some operators do further inspection.

 

Inspection Method
  • Size and surface inspection
  • NDT and pressure test and third party certication
  • Hydrostatic
  • Drifting test
  • Physical and chemicail analysis
  • Hardness and pressure test.
  • Electromagnetic
  • Magnetic particle
  • Ultrasonic
  • Dimensions And Weight
    Size Weight Outside Diameter Wall Thickness End Finish
    Grade
    in mm in mm J55
    K55     		L80 N80 C90
    T95     		P110
    4 1/2 9.50 4.500 114.3 0.205 5.21 PS - - - -
    10.50 0.224 5.69 PSB - - - -
    11.60 0.250 6.35 PSLB PLB PLB PLB PLB
    13.50 0.290 7.37 - PLB PLB PLB PLB
    15.10 0.337 9.56 - - - - PLB
    5 11.50 5.00 127.00 0.220 5.59 PS - - - -
    13.00 0.253 6.43 PSLB - - - -
    15.00 0.296 7.52 PSLB PLB PLB PLBE PLB
    18.00 0.362 9.19 - PLB PLB PLBE PLB
    21.40 0.437 11.10 - PLB PLB PLB PLB
    23.20 0.478 12.14 - PLB
    24.10 0.500 12.70 - PLB
    5 1/2 14.00 5.500 139.7 0.244 6.20 PS - - - -
    15.50 0.275 6.98 PSLB - - - -
    17.00 0.304 7.72 PSLB PLB PLB PLBE PLB
    20.00 0.361 9.17 - PLB PLB PLBE PLB
    23.00 0.415 10.54 - PLB PLB PLBE PLB
    6 5/8 20.00 6.625 168.28 0.288 7.32 PSLB - - - -
    24.00 0.352 8.94 PSLB PLB PLB PLBE PLB
    28.00 0.417 10.59 - PLB PLB PLBE PLB
    32.00 0.475 12.06 - PLB PLB PLBE PLB
    7 17.00 7.00 177.80 0.231 5.87 - - - - -
    20.00 0.272 6.91 PS - - - -
    23.00 0.317 8.05 PSLB PLB PLB PLBE -
    26.00 0.362 9.19 PSLB PLB PLB PLBE PLB
    29.00 0.408 10.36 - PLB PLB PLBE PLB
    32.00 0.453 11.51 - PLB PLB PLBE PLB
    35.00 0.498 12.65 - PLB PLB PLBE PLB
    38.00 0.540 13.72 - PLB PLB PLBE PLB
    7 5/8 24.00 7.625 193.68 0.300 7.62 - - - - -
    26.40 0.328 8.33 PSLB PLB PLB PLBE PLB
    29.70 0.375 9.52 - PLB PLB PLBE PLB
    33.70 0.430 10.92 - PLB PLB PLBE PLB
    39.00 0.500 12.70 - PLB PLB PLBE PLB
    42.80 0.562 14.27 - PLB PLB PLB PLB
    45.30 0.595 15.11 - PLB PLB PLB PLB
    47.10 0.625 15.88 - PLB PLB PLB PLB
    8 5/8 24.00 8.625 219.08 0.264 6.71 PS - - - -
    28.00 0.304 7.72 - - - - -
    32.00 0.352 8.94 PSLB - - - -
    36.00 0.400 10.16 PSLB PLB PLB PLBE PLB
    40.00 0.450 11.43 - PLB PLB PLBE PLB
    44.00 0.500 12.70 - PLB PLB PLBE PLB
    49.00 0.557 14.15 - PLB PLB PLBE PLB
    9 5/8 32.30 9.625 244.48 0.312 7.92 - - - - -
    36.00 0.352 8.94 PSLB - - - -
    40.00 0.395 10.03 PSLB PLB PLB PLBE -
    43.50 0.435 11.05 - PLB PLB PLBE PLB
    47.00 0.472 11.99 - PLB PLB PLBE PLB
    53.50 0.545 13.84 - PLB PLB PLBE PLB
    58.40 0.595 15.11 - PLB PLB PLB PLB
    10 3/4 32.75 10.75 273.05 0.279 7.09 - - - - -
    40.50 0.350 8.89 PSB - - - -
    15.50 0.400 10.16 PSB - - - -
    51.00 0.450 11.43 PSB PSB PSB PSBE PSB
    55.50 0.495 12.57 - PSB PSB PSBE PSB
    60.70 0.545 13.84 - - - PSBE PSB
    65.70 0.595 15.11 - - - PSB PSB
    13 3/8 48.00 13.375 339.73 0.330 8.38 - - - - -
    54.50 0.380 9.65 PSB - - - -
    61.00 0.430 10.92 PSB - - - -
    68.00 0.480 12.19 PSB PSB PSB PSB PSB
    72.00 0.514 13.06 - PSB PSB PSB PSB
    16 65.00 16 406.40 0.375 9.53 - - - - -
    75.00 0.438 11.13 PSB - - - -
    84.00 0.495 12.57 PSB - - - -
    109.00 0.656 16.66 P P P - P
    18 5/8 87.50 18.625 473.08 0.435 11.05 PSB - - - -
    20 94.00 20 508.00 0.438 11.13 PSLB - - - -
    106.50 0.500 12.70 PSLB - - - -
    133.00 0.635 16.13 PSLB - - - -