hot rolled API 5CT,J55 K55 seamless steel oil casing and tubing in oil field

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hot rolled API 5CT,J55 K55 seamless steel oil casing and tubing in oil field

API5CT oil casing pipe

API5CT oil casing pipe

Abter Steel Pipe is a professional industrial pipe manufacturer based in China, we have been producing pipe for a variety of applications, and covering areas of pipe manufacturing, exporting and trading. welcome to access our

The steel grades of common oilfield API-5CT casing pipe include J55, K55, N80-1, N80Q, and P110. Casing pipe is mostly used for oil well drilling. In accordance with API-5CT and ISO11960 standard, pipes can be classified as STC (short thread), LTC (long thread) and BTC (buttress thread) accompanied with their couplings.

Production Process of API 5CT,J55 K55 seamless steel oil casing and tubing
Hot rolling (extruding seamless steel pipe): Circular tube billet→ Heating→ Piercing→ Three-roller skew rolling, tandem rolling or extrusion→ Tube knockout→ Sizing (or tubing reduction) → Cooling→ Straightening→ Hydraulic test (or flaw detection) → Marking→ Entering warehouse

Detailed Specifications

StandardsAPI SPEC 5CT
Model in Common Use2-3/8″, 2-7/8″, 3-1/2″, 4″, 4-1/2″
Length RangeR1(6.10-7.32m), R2(8.53-9.75m), R3(11.58-12.8m)
Steel GradeJ55, K55, N80-1, N80-Q, L80, P110
Type of Screw ThreadNon upset threaded end(NUE), External upset threaded end(EUE)





  1. ocncetkcf says:

    What is the size range of the K55 / J55 casing pipe ?

    • admin says:

      Length range up to 7.62 m (25′)
      Available in casing dimensions of 114.3 mm (4.5″) to 508 mm (20″)
      General purpose pipe manufactured to API specification 5CT. Similar to J55 but the minimum tensile strength is higher
      Available in mechanical tube dimensions of 101.6 mm (4″) od to 533.4 mm (21″) od / 7.52 mm (0.3″) wall to 32.13 mm (1.27″) wall

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