API Oil Casing Pipe for OCTG Oil & Gas Wells

API Oil/Casing Pipe

Strictly comply with API 5CT, API 5B, ISO11960 for oil‑gas field service
Complete grade range: H40, J55, N80, L80 series, P110, V150, Q125
Multiple threads: BTC, LC, SC, LTC and VAM premium special connections
Available R1/R2/R3 length options for different down‑hole well depth requirements

Product Overview

API Oil/Casing Pipe is an OCTG (Oil Country Tubular Goods) product specially designed for oil, gas, and geothermal well operations. It is mainly used as tubing and casing material in down-hole environments, providing reliable tubular support for well construction, cementing, completion, and production processes.

Manufactured according to API Spec 5CT, API Spec 5B, and ISO 11960 requirements, API Oil/Casing Pipe covers a complete range of tubing and casing steel grades, including J55, N80, L80 series, P110, C90, T95, Q125, H40, K55, and V150. These options allow buyers to select suitable mechanical performance and corrosion resistance according to different well conditions.

The product supports various connection designs, including BTC buttress thread, LC long thread coupling, SC short thread coupling, LTC long round thread, and VAM premium special connections for demanding operating environments. Different R1, R2, and R3 length options are available to meet different well depth requirements.

API Oil/Casing Pipe is widely applied in onshore oilfields, offshore drilling platforms, shale gas extraction, coal-bed methane wells, geothermal wells, fracturing operations, and oil-gas gathering systems. It is suitable for oilfield service companies, drilling contractors, and energy project applications requiring standardized OCTG solutions.

API Oil/Casing Pipe

Chemical & Mechanical Property Snapshot

Grade	C (%)	Mn (%)	P (Max %)	S (Max %)	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
H40	0.28–0.38	1.20–1.50	0.030	0.030	276	≥414	≥29
J55	0.28–0.39	1.20–1.50	0.030	0.030	379–552	≥517	≥24
K55	0.28–0.39	1.20–1.50	0.030	0.030	379–552	≥655	≥24
N80	0.28–0.43	1.30–1.60	0.030	0.030	552–758	≥689	≥18
L80	0.25–0.35	1.20–1.50	0.030	0.030	552–655	≥689	≥18
L80-9Cr	0.15 Max	0.30–0.60	0.020	0.010	552–655	≥689	≥18
L80-13Cr	0.15 Max	0.25–0.60	0.020	0.010	552–655	≥689	≥18
C90	0.25–0.35	1.20–1.50	0.030	0.030	621–758	≥724	≥18
T95	0.25–0.35	1.20–1.50	0.030	0.030	655–758	≥724	≥18
P110	0.25–0.35	1.30–1.60	0.030	0.030	758–965	≥862	≥15
Q125	0.25–0.35	1.30–1.60	0.030	0.030	862–1034	≥931	≥14
V150	0.25–0.35	1.30–1.60	0.030	0.030	1034–1241	≥1103	≥12

Detailed Technical Specifications

Item	Technical Details
Product Name	API Oil/Casing Pipe
Product Category	Carbon Steel Pipe / OCTG Pipe
Applicable Standards	API Spec 5CT, API Spec 5B, ISO 11960, GB/T 1983, SY/T 6194
Tubing Steel Grades	J55, N80-1, N80-Q, L80-1, L80-9Cr, L80-13Cr, P110, C90, T95, Q125
Casing Steel Grades	H40, J55, K55, N80, L80, P110, V150
Tubing Outer Diameter Range	1.05″, 1.315″, 1.66″, 1.9″, 2-3/8″, 2-7/8″, 3-1/2″
Casing Outer Diameter Range	4-1/2″, 5-1/2″, 7″, 7-5/8″, 9-5/8″, 10-3/4″, 13-3/8″, 16″, 20″
Thread Types	BTC buttress thread, LC long thread coupling, SC short thread coupling, LTC long round thread, VAM premium special connection
Length Options	R1: 4.88m; R2: 7.32m; R3: 10.36m
Application Environment	Onshore oilfield, offshore platform, shale gas, coal-bed methane, geothermal well, fracturing operation
Corrosion Resistant Options	L80-13Cr alloy series for acid-gas and corrosive environments
Inspection Requirement	API standard inspection with Mill Test Report availability
MOQ	5 Ton
Payment Terms	T/T, L/C at Sight
Delivery Time	7–15 working days after receiving deposit
Package	Waterproof paper + galvanized steel strap + seaworthy export wooden pallet

Dimension Range Table

Type	Nominal Size (inch)	OD (mm)	Wall Thickness Options	Length
Tubing	1.05″	26.67	Standard / Heavy	R1 / R2 / R3
Tubing	1.315″	33.40	Standard / Heavy	R1 / R2 / R3
Tubing	1.66″	42.16	Standard / Heavy	R1 / R2 / R3
Tubing	1.9″	48.26	Standard / Heavy	R1 / R2 / R3
Tubing	2-3/8″	60.32	Standard / Heavy	R1 / R2 / R3
Tubing	2-7/8″	73.03	Standard / Heavy	R1 / R2 / R3
Tubing	3-1/2″	88.90	Standard / Heavy	R1 / R2 / R3
Casing	4-1/2″	114.30	Standard / Heavy / Extra Heavy	R1 / R2 / R3
Casing	5-1/2″	139.70	Standard / Heavy / Extra Heavy	R1 / R2 / R3
Casing	7″	177.80	Standard / Heavy / Extra Heavy	R1 / R2 / R3
Casing	7-5/8″	193.68	Standard / Heavy / Extra Heavy	R1 / R2 / R3
Casing	9-5/8″	244.48	Standard / Heavy / Extra Heavy	R1 / R2 / R3
Casing	10-3/4″	273.05	Standard / Heavy / Extra Heavy	R1 / R2 / R3
Casing	13-3/8″	339.73	Standard / Heavy / Extra Heavy	R1 / R2 / R3
Casing	16″	406.40	Standard / Heavy / Extra Heavy	R1 / R2 / R3
Casing	20″	508.00	Standard / Heavy / Extra Heavy	R1 / R2 / R3

Product Comparison Table

Comparison Item	API Oil/Casing Pipe	Carbon Steel Pipe	Seamless Steel Pipe	Stainless Steel Pipe
Main Application	Oil wells, gas wells, geothermal wells, OCTG systems, downhole oil & gas extraction	Structural and fluid transportation, building, pipeline projects	High-pressure industrial pipelines, boilers, hydraulic cylinders	Corrosion-resistant industrial applications, chemical, marine
Standard System	API Spec 5CT / API Spec 5B / ISO 11960	ASTM, EN, GB, JIS standards	ASTM / EN / GB standards	ASTM / EN stainless steel standards
Steel Grade Range	H40, J55, K55, N80, L80, L80-9Cr, L80-13Cr, C90, T95, P110, Q125, V150	General carbon steel grades (Q235, Q355, A106, A53)	A106 Gr.B, A53 Gr.B, 20#, 45#, 16Mn	304, 316, 316L, 321, 2205 and other stainless steel grades
Connection Type	BTC, LC, SC, LTC, VAM premium threaded connections	Welding, threading, or standard fittings	Welding or machining connections	Welding or threaded connections
Length Standard	R1 (4.88 m), R2 (7.32 m), R3 (10.36 m)	Usually customized or fixed lengths	Customized according to standards	Customized according to requirements
Typical Buyer	Oilfield companies, drilling contractors, energy projects	Construction, machinery, pipeline users	Pressure pipeline users, power plants	Chemical, marine, food industries
Core Feature	Designed for downhole high pressure, high temperature, threaded coupling	General structural and fluid conveyance	High-pressure seamless blank pipe	Excellent corrosion resistance

App Market

Reliable Steel Coil Solutions For Diverse Industrial Applications

Crude Oil and Natural Gas Transportation in Oil & Gas Production

Offshore Oil & Gas Well Casing and Cementing

Onshore Oilfield

Product Packaging

Secure Export Packaging For Safe Handling And Delivery

FAQs

What standards does API Oil/Casing Pipe follow?

API Oil/Casing Pipe is manufactured according to API Spec 5CT, API Spec 5B, ISO 11960, GB/T 1983, and SY/T 6194 standards.

What steel grades are available for API Oil/Casing Pipe?

The product includes tubing grades such as J55, N80, L80 series, P110, C90, T95, and Q125, as well as casing grades including H40, J55, K55, N80, L80, P110, and V150.

Which thread connections can be selected?

Available options include BTC, LC, SC, LTC, and VAM premium special connections according to different well requirements.

What industries use API Oil/Casing Pipe?

It is widely used in oil and gas extraction, offshore drilling, shale gas, coal-bed methane, geothermal wells, and fracturing operations.

Can API Oil/Casing Pipe be supplied in different lengths?

Yes. R1, R2, and R3 standard lengths are available for different well depth requirements.

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API Oil Casing Pipe for OCTG Oil & Gas Wells