This news page covers API 5CT casing and tubing in relation to API 5CT N80-1/N80Q Casing Pipe. The content highlights standards such as API 5CT and supply and delivery details, size and dimension requirements, inspection and testing requirements. Buyers can use the page to check whether the product, grade, size range, inspection requirements and delivery details match their inquiry.
Shanghai ShengQiu supplies API5CT N80 Tubing and Casing.
API 5CT N80-1/N80Q
O.D.: 10MM-720MM
W.T.: 1MM-35MM
Don't hesitate to contact us at any time for good price.
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.
Delivery Condition
Annealed, Normalized, Normalized and Tempered
Surface Treatment
Oiled, Shot Blasting, Varnish
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
Application
Conveying gas, water, and oil in the petroleum and natural gas industries.
Tubing and Casing for the petroleum and natural gas industries.
