API 5CT J55 and K55 casing and tubing are relatively low grade material pipe among all API 5CT pipes, they have same chemical composition and same yield strength 379-552 Mpa but in different tensile, J55 tensile strength minimum 517 Mpa which K55 is 655 Mpa. J55/K55 are lower grade than N80, L80, P110 or T95, so they are a cheaper option material and widely used in non corrosive oil well installation without high strength requirement.
J55/K55 identification API color code
J55 Tubing: One bright green band, coupling bright green and no bands.
J55 Casing: One bright green band, coupling bright green and with one white band.
K55 Casing and Tubing: two bright green, coupling bright green and no bands.
Connections
API 5CT is applicable to following connections which complied with API SPEC 5B:
• SC: Short round thread casing
• LC: Long round thread casing
• BC: Buttress thread casing
• NU: Non-upset tubing
• EU: External upset tubing
• IJ: Integral tubing connections
• Premium connections
Reference Inspection for J55/K55
Visual inspection for pipe surface
Dimension check
Mechanical test on tensile strength, yield strength and elongation
Chemical analysis
NDT test including Magnetic particle, Ultrasonic Test, Hydrostatic Test
Charpy impact test
Flattening tests
Hardness test
Drift test
Thread ends check with thread gauge and coupling check
API 5CT L80 casing and tubing include grades L80-1, L80 9Cr (Cr 8%-10%), L80 13Cr (Cr 12%-14%), L80, minimum tensile strength 655 Mpa, yield strength 552 Mpa to 655 Mpa, it is a medium strength grade higher than J55/K55, and similar with N80 (YS 552 Mpa to 758 Mpa, TS 689 Mpa), L80 pipes has been used in oil well establishment, drilling and producinging oil and gas industries.
API 5CT Grade L80 includes L80-1, L80 13Cr, L80 9Cr
In this standard when the symbol L80 is used alone it covers Grades L80 Type 1, L80 9Cr (Chromium content 8% to 10%) and L80 13 Cr (Chromium content 12% to 14%).
API 5CT L80 13Cr Casing
L80 identification of color band
One red, one brown marked for L80-1. Pipe marked with L.
One red, one brown, two yellow marked for L80 9Cr. Simplified marking L9.
One red, one brown, one yellow marked for L80 13Cr. Simplified marking L13.
Special clearance couplings shall also have a black band.
Seal-ring coupling shall also have a blue band.
API 5CT Grade N80 type Q casing pipe is a medium grade in casing pipe products and has been widely used in oil and gas well drilling activities. Grade N80 has two level N80 type 1 and N80 type Q, more materials available like 9Cr-80 and 13Cr-80.
API 5CT N80 casing manufacturing processes
Like other grades of API 5CT, manufacturing processes includes hot rolled in seamless and ERW welded. In most of the cases the casing pipe adopts the seamless type.
Connection type, ends and Couplings
N80 casing pipe connection type usually refer to BTC, which is buttress thread marked with BC symbol; Other than this type there are short round and long round thread types, corresponding marked as SC or LC symbol. And in case client required, we could customize connection threads and couplings.
N80-1 and N80 Q casing pipe sizes
Casing pipe sizes of N80-1 and N80-Q refer to the pipe diameters equal to or more than 5 1/2" inch. Blow to this size is the tubing.
API 5CT P110 Casing and Tubing is a high grade than J55/K55, N80, L80 and T95, tensile strength minimum 862 Mpa, yield strength 758 to 965 Mpa. P110 casing ends with white band to specify this material, it is widely used for oil drilling and producing in a particular surroudings especially for a deep oil well.
API 5CT P110 Casing:
P110 Casing is installed 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 needs to bear its own weight and withstand the torque and transaxial pressure placed on it while running downhole. Casing is considered as a pipe pile that will stabilize the oil well.
API 5CT P110 Tubing:
P110 Tubing is installed inside the casing. It is used to transport (pump) crude oil or natural gas from the source rock to the ground wellhead. Inside tubing is sucker rods, where used for pumping oil and gas.
supply range for J55/K55 L80 N80 P110 Type Q casing and tubing
Standards: API SPEC 5CT P110 Casing and Tubing
Grades: P110
Stock Available: Yes
Manufacturing process: Seamless, ERW
P110 Casing and Tubing Outer Diameter: 2-3/8", 2-7/8", 3-1/2", 4-1/2", 5-1/2", 6-5/8", 7", 7-5/8", 7-3/4", 8-5/8", 9-5/8", 10-3/4", 11-3/4", 13-3/8", 16", 18-5/8", 20"
Thickness: 4 LB/FT to 106.59 LB/FT, 0.244" to 0.875"
Coupling thread: BTC, Buttress (Regular, Special bevel or special clearance), LTC, STC, premium connections threads.
Length: R1, R2, R3, customized
Hot Tags: api 5ct grade j55/k55 l80 n80 p110 type q casing and tubing, China api 5ct grade j55/k55 l80 n80 p110 type q casing and tubing manufacturers, suppliers, factory
