introduction to  API tubing: A comprehensive guide

API Tubing: A Comprehensive Guide API tubing, also known as american petroleum institute tubing, is an essential component in the oil and gas industry. It plays a crucial role in the extraction and transportation of oil and gas from the wellbore to the surface. In this comprehensive guide, we will explore the various aspects of API tubing, including its definition, specifications, and applications. API tubing is a type of Pipe that is specifically designed for use in oil and gas wells. It is made from high-quality steel and is available in various sizes and grades to meet the specific requirements of different well conditions. The primary purpose of API tubing is to provide a conduit for the flow of oil and gas from the reservoir to the surface. When it comes to API tubing, specifications are of utmost importance. The American Petroleum Institute has established a set of standards and specifications that must be met by manufacturers to ensure the quality and reliability of the tubing. These specifications cover various aspects, including dimensions, mechanical properties, chemical composition, and testing procedures. API tubing is available in different grades, with each grade having its own set of specifications. The most commonly used grades include J55, k55, n80, l80, and p110. These grades differ in terms of their mechanical properties, such as yield strength and tensile strength, as well as their resistance to corrosion and other environmental factors.

							Calculated mass c
			Nominal linear Mass T& C b,c	Wall Thick- ness				em, Mass Gain or Loss Due to End Finishing d
Labels a		Outside diameter			inside Diameter	Drift Diameter	Plain- end	kg
								round Thread		Buttress Thread
							wpe
		D	kg/m	t	D	mm	kg/m	Short	Long	RC	SCC
		mm		mm	mm
1	2	3	4	5	6	7	8	9	10	11	12
7	17	177.8	25.6	5.87	166.06	162.88	24.89	7.61	—	—	—
7	20	177.8	29.91	6.91	163.98	160.8	29.12	6.74	— 7.94	— 8.28	— 0.58
7	23	177.8	34.67	8.05	161.7	158.75 e 158.52 156.24 153.90	33.7	6.26	7.94	8.28	0.58
7	23	177.8	34.67	8.05	161.7	152.40 e	33.7	6.26	7.37	7.65	–0.54
7	26	177.8	39.14	9.19	159.42	151.6	38.21	5.79	6.79	7.13	–0.69
7	29	177.8	43.6	10.36	157.08	149.32	42.78	—	6.23	6.4	–1.31
7	32	177.8	47.92	11.51	154.78	147.18	47.2	—	6.23	6.4	–1.31
7	32	177.8	47.92	11.51	154.78	142.86	47.2	—	5.68	5.79	–1.91
7	35	177.8	52.09	12.65	152.5	139.72	51.52	—	5.18	5.24	–2.47
7	38	177.8	56.1	13.72	150.36	136.52	55.52	—	—	—	—
7	42.7	177.8	63.84	15.88	146.04	133.38	63.41	—	—	—	—
7	46.4	177.8	69.35	17.45	142.9	130.18	69.01	—	—	—	—
7	50.1	177.8	74.85	19.05	139.7		74.58	—	—	—	—
7	53.6	177.8	80.21	20.62	136.56		79.93	—	—	—	—
7	57.1	177.8	85.42	22.22	133.36		85.25	—
7 5/8	24	193.68	35.72	7.62	178.44	175.26	34.96	7.11	— 8.58	— 9.12	— 2.59
7 5/8	26.4	193.68	39.29	8.33	177.02	173.84	38.08	6.78	7.91	8.38	1.84
7 5/8	29.7	193.68	44.2	9.52	174.64	171.46	43.24	—	7.13	7.51	0.98
7 5/8	33.7	193.68	50.15	10.92	171.84	168.66	49.22	—	6.16	6.44	– 0.10
7 5/8	39	193.68	58.04	12.7	168.28	165.1	56.68	—	5.32	5.5	–1.03
7 5/8	42.8	193.68	63.69	14.27	165.14	161.96	63.14	—	4.87	5.01	–1.52
7 5/8	45.3	193.68	67.41	15.11	163.46	160.28	66.54	—	4.48	4.57	–1.96
7 5/8	47.1	193.68	70.09	15.88	161.92	158.74	69.63	—	—	—	—
7 5/8	51.2	193.68	76.19	17.45	158.78	155.6	75.84	—	—	—	—
7 5/8	55.3	193.68	82.3	19.05	155.58	152.4	82.04	—
7 3/4	46.1	196.85	68.6	15.11	166.63	165.10 e	67.72	—	—	—	—
7 3/4	46.1	196.85	68.6	15.11	166.63	163.45	67.72	—	—	—	—

In addition to the specifications, API tubing also comes in different sizes. The size of the tubing is determined by its outer diameter (OD) and Wall thickness. The most common sizes range from 2 3/8 inches to 4 1/2 inches in OD, with wall thicknesses varying from 0.190 inches to 0.435 inches. The selection of the appropriate size depends on factors such as well depth, production rate, and well conditions.

API tubing finds a wide range of applications in the oil and gas industry. Its primary function is to transport oil and gas from the wellbore to the surface. It is also used for other purposes, such as injecting fluids into the well for enhanced oil recovery and supporting the Casing string to prevent collapse. API tubing is designed to withstand high pressure and temperature conditions, making it suitable for use in various well environments. EVA Case for Oil Essential When it comes to installation, API tubing is typically run into the wellbore using a tubing string. The tubing string consists of multiple joints of tubing connected together using Threaded connections. These connections are designed to provide a tight Seal