Casing Pipe is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or well bore. It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow drilling fluid to circulate and extraction to take place. Steel Casing Pipes have smooth wall & minimum yield strength of 35,000 psi.
Descriptions: 
1 Production Process: Seamless & ERW 
2 Specification: API 5CT /5B
3 Out Diameter: 4 1/2"- 20" (114.3mm-508mm) 
4 Thread: LTC ( Long Round Thread), STC ( Short Round Thread), BTC ( Buttress Thread) and other premium connections which can be made as per the given drawings
5 Length:R1(4.88-7.62m), R2(7.62-10.36m), R3(10.36-14.63m))
6 Steel Grade: H-40, J55, K-55, N-80, L-80, P110, Q-125
7 Surface: Corrosion proofing water based paint
8 Heat treatment: Normalized, Quencher+Temper
9 Loading: 
Pipe length less than 5.8m (20 feet container) 
Pipe length less than 11.8m (40 feet container) 
Pipe length more than 11.8m (Bulk shipment) 
10 Loading Port: Mainly Tianjin Port, 
11 Shipment: by containers or in bulk vessel 
12 Payment Terms: TT, LC
13 Packing: in bundles with steel strips , then wrapped in nylons or in bulk as per the loading requirements