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Union-Steel - Tubing and Casing Pipe
Tubing is the pipeline used to transport crude oil and natural gas from the oil layer or gas layer to the surface after the drilling is completed. It can withstand the pressure generated during the extraction process. Tubing is manufactured in the same way as casing, except that an additional process called "upsetting" is applied to thicken the pipe. Casing is used to line complete boreholes that have been dug into the ground for oil. Like drill pipe, oil well casing also bears axial tension, so high-quality high-strength steel is required. OCTG casings are large diameter pipes that are cemented into a borehole.
- Product Name: Tubing, Casing
- Grades: ISO 19060:2004 / API SPEC 5B /API 5CT H40, J55,K55,L80, N80,P110, C90, T95, Q125
- Outside Diameters: Tubing: 26.7 -114.3 mm; Casing: 114.3 - 762 mm
Connections in accordance with API 5CT
- Short round thread casing (STC)
- Long round thread casing (LC)
- Buttress thread casing (BC)
- Extreme-line casing (XC)
- Non-upset tubing (NU)
- External upset tubing (EU)
- Integral joint tubing (IJ)
For such connections, API 5CT specifies the technical delivery conditions for couplings and thread protection. For pipes covered by API 5CT, the sizes, masses, wall thicknesses, grades and applicable end finishes are defined. API 5CT may also be applied to tubulars with connections not covered by ISO/API standards.
