API 5CT Q125 Casing serves to transport both crude oil and natural gas from oil and gas layer to the surface pipeline after drilling is completed. The casing is able to bear the pressure produced by the exploitation process. After the outer surface is coated with a protective layer, the casing is marked in accordance with the API 5CT standard and strapped with metal belt.
Q125 Casing is placed downhole to provide structural integrity to the wellbore and must withstand external-collapse pressure from rock formations and internal-yield pressure from fluid and gas. It must also hold its own deadweight and withstand the torque and pressure placed on it while running downhole.
Our oilfield tubing & API 5CT Q125 Casing can be widely applicable to petroleum, construction, shipbuilding, smelting, aviation, electric power, food, paper, chemical industry, medical equipment, boilers, heat exchangers, metallurgy and so on.
Specification of API 5CT Q125 Casing
Specifications include 1.9in (48.3mm), 2 3/8in (60.3mm), 2 7/8in (73.03mm), 3 1/2in (88.9mm), 4in (101.6mm), 4 1/2in (114.3mm) etc. The depth of our product for descending the well is basically identical to that of oil casing pipe. Both mechanical property and sealing performance of this tubing are also required to correspond with the oil casing pipe. Petroleum Tubing main steel grade includes J55, N80, C90, P110 and some others.
Features of of API 5CT Q125 Casing
API 5CT Q125 Casing is offered with a free length range from 8 to 13m on basis of the SY/T6194-96 norm. However, it is also available no less than 6m length and its quantity should be no more than 20%.
• Any deformation such as crease, hairline, separation, crack or scab is not acceptable on both inner and outer surfaces of the product. All these defects should be completely removed, and the removed depth must not exceed 12.5% of nominal wall thickness.
• Deformations which mentioned above are not allowed to appear on the outer surface of API 5CT Q125 Casing coupling.
• The surface of thread of coupling and API 5CT Q125 Casing should be smooth without any burr, tear or other defects that may have a negative impact on the strength and close connection.
API 5CT Q125 Casing Packaging
In compliance with the regulation of SY/T6194-96, the domestic API 5CT Q125 Casing should be strapped with steel wire or belt. The protection ring should be screwed on the exposed part of the thread of each casing pipe and its coupling to well protect the thread.