Carbon Seamless Steel Pipe L80/Q125/J55/K55/N80 API 5CT OCTG Oil Casing Pipe

Product Description

Oil casing is a steel pipe used to support the well wall of oil and gas wells to ensure the normal operation of the entire oil well during the drilling process and after completion. Each well uses several layers of casing based on different drilling depths and geological conditions.

Casing pipe is the major structural component of a well. The API 5CT Casing pipe is a large-diameter steel pipe that serves as the structural retainer for the walls of oil and gas wells, and typically held into place with cement.

API 5CT casing 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.

According to the strength of the steel itself, casing can be divided into different steel grades, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Different well conditions and well depths require different steel grades. In corrosive environments, the casing itself is also required to have corrosion resistance.
Casing Pipe Specifications Standards: Model in Common Use: Length Range: Steel Grade (Casing Grades, Tubing Grades): Type of Screw Thread: Specialties

API SPEC 5CT

2-3/8″, 2-7/8″, 3-1/2″, 4″, 4-1/2″

R1(6.10-7.32m), R2(8.53-9.75m), R3(11.58-12.8m)

J55, K55, N80-1, N80-Q, L80, P110

Non upset threaded end(NUE), External upset threaded end(EUE)

Threading Heat treating External upset Drifting (Full-length, or just ends) Hydrostatic Testing Full third-party inspection capabilities (EMI, SEA, and Weld Line) Couplings - EUE, AB Modified, turned down, special clearance couplings Coating to customer specifications Pup Joints

Oil Tube For Petroleum And Natural Gas Industries
Name of Pipes Specification Steel Grade Standard D (S) (L) (mm) (mm) (m)

Petroleum Casing Pipe	127-508	5.21-16.66	6-12	J55. M55. K55. L80. N80. P110.	API Spec 5CT (8)
Petroleum Tubing	26.7-114.3	2.87-16.00	6-12	J55. M55. K55. L80. N80. P110.	API Spec 5CT (8)
Coupling	127-533.4	12.5-15	6-12	J55. M55. K55. L80. N80. P110.	API Spec 5CT (8)

Composition Standard of API-5CT L80 Casing Pipe

Grade	C≤	Si≤	Mn≤	P≤	S≤	Cr≤	Ni≤	Cu≤	Als≤
API 5CT L80	0.15-0.22	1.00	0.25-1.00	0.020	0.010	12.0-14.0	0.20	0.20	0.020

Carbon Steel API 5CT GR. L80 Pipes Mechanical Analysis

Steel Grade	Yield Strength (Mpa)	Tensile Strength (Mpa)
API 5CT L80	552-655	≥655

API 5CT GR.L80 Pipe Dimension Tolerance

Types of steel tubes	Outer Diameter		Wall Thickness
Cold-rolled tubes	Tube sizes(mm)	Tolerances(mm)	Tolerances(mm)
	<114.3	±0.79	-12.5%

Casing and tubing for Sour Oil and Gas Service must have a good anti-SSCC (sulfide stresscorrosion and cracking) performance in the environment where hydrogen sulfide corrosion exists.

Oil casing Pipe is widely used in the manufacture of structural and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle frames, and steel scaffolding used in construction. Using petroleum cracking pipes to manufacture ring-shaped parts can improve material utilization, simplify the manufacturing process, save materials and processing hours, such as rolling bearing rings, jack sets, etc., which have been widely manufactured with steel pipes.
Q1. What are your company's main products ?
A1: Our main products are steel pipe, and sheets, coils, strips, bars and channels.

Q2. What are the advantages of your company ?
A2: (1) Have complete production equipment and professional technical personnel
(2) Currently, we have reached cooperation with customers from many countries and have rich export experience.
(3) Factory direct sales, the price is more competitive

Q3. How many coutries you already exported ?
A3: Exported to more than 20 countries mainly from Middle East, Russia, United States, Canada, Italy, Germany, Australia, Egypt, Japan, Indonesia, Bangladesh, Turkey, India, etc.

Q4. Can you provide sample ? Do you support OEM ?
A4: Yes. Small samples in store can be provided for free. Customized samples will take about 2-3days.

Q5: What's your payment terms ?
A5: By T/T(30% deposit in advance, balance 70% before shipment),, L/C after sight 30~120 days. Western Union, Paypal, or Trade Online.