Sizes:

Out Diameter: 1.315"- 20"
Wall Thickness: 0.133"-0.500"
Length:R1(group1),R2(group2),R3(group3)  

Materials & Grades: 

Casing: API 5CT J55, K55, N80, L80-1, L80-9Cr, L80-13Cr, P110 

Application:

oil well extracting 

borehole 

borewell 

Types:

Seamless Casing

ERW Casing

Casing nipple
Casing coupling 

Connections:

P (Plain end)

STC (short threads)

LTC (long threads)

BTC (buttress threads)

Premium gas-tight connectors

Non-upset ends (NUE)

External upset ends (EUE)

Premium gas-tight connectors

Others special connectors 

Chemical compositions of casing pipe

Mechanical properties of casing pipe

Casing Pipe Manufacturing Process:

Steel ingot heating → hydraulic punching → reheating → extension → periodic rolling → reheating → sizing → cooling → straightening → pipe cutting → inspection

1. An annular heating furnace is required for ingot heating;
2. Punching and reheating with hydraulic press;
3. The oil casing plant uses a two-roller guide plate extension machine for extension;
4. Re-use a disc heating furnace for periodic rolling, and use a non-entry furnace for reheating, cooling, straightening, pipe cutting, and inspection.