What is OCTG? It includes Drill Pipe, Steel Casing Pipe and Tubing

Exploring the Basics of OCTG: What is OCTG and What Does it Include? Oil country tubular Goods (OCTG) is a term used to describe a family of seamless rolled steel products that are used in the oil and gas industry. OCTG includes drill Pipe, casing and Tubing, which are used to transport oil and gas…

Exploring the Basics of OCTG: What is OCTG and What Does it Include?

Oil country tubular Goods (OCTG) is a term used to describe a family of seamless rolled steel products that are used in the oil and gas industry. OCTG includes drill Pipe, casing and Tubing, which are used to transport oil and gas from the wellbore to the surface. OCTG is manufactured in a variety of sizes, grades, and connections to meet the needs of the oil and gas industry.

Chemical Composition, Mass Fraction (%)
Grade   C Mn Mo Cr Ni Cu P S Si
  Type min max min max min max min max max max max max max
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
H40 0.03
J55 0.03
K55 0.03
N80 1 0.03 0.03
N80 Q 0.03 0.03
R95 0.45 c 1.9 0.03 0.03 0.45
L80 1 0.43 a 1.9 0.25 0.35 0.03 0.03 0.45
L80 9Cr 0.15 0.3 0.6 0.9 1.1 8 10 0.5 0.25 0.02 0.03 1
L80 13Cr 0.15 0.22 0.25 1 12 14 0.5 0.25 0.02 0.03 1
C90 1 0.35 1.2 0.25 b 0.85 1.5 0.99 0.02 0.03
T95 1 0.35 1.2 0.25 b 0.85 0.4 1.5 0.99 0.02 0.03
C110 0.35 1.2 0.25 1 0.4 1.5 0.99 0.02 0.03
P110 e 0.030 e 0.030 e
Q125 1 0.35   1.35 0.85 1.5 0.99 0.02 0.01
NOTE Elements shown shall be reported in product analysis.
a The carbon content for L80 may be increased up to 0.50 % maximum if the product is oil-quenched or polymer-quenched.
b The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the wall thickness is less than 17.78 mm.
c The carbon content for R95 may be increased up to 0.55 % maximum if the product is oil-quenched.
d The molybdenum content for T95 Type 1 may be decreased to 0.15 % minimum if the wall thickness is less than 17.78 mm.
e For EW Grade P110, the phosphorus content shall be 0.020 % maximum and the sulfur content 0.010 % maximum.

Drill pipe is a hollow, thick-walled, steel pipe used to rotate the drill bit and circulate drilling fluid in the wellbore. It is made up of a tube, a tool joint, and a pin connection. The tube is the main body of the drill pipe and is manufactured to a specific outside diameter and wall thickness. The tool joint is a threaded connection that is used to connect the drill pipe to the drill bit. The pin connection is a threaded connection that is used to connect the drill pipe to the drill string.

oil tube chinese high-grade wholesaler,casing pipe china good company,casing is a large-diameter pipe that is used to line the wellbore and protect it from collapse. It is made up of a tube, a coupling, and a thread connection. The tube is the main body of the casing and is manufactured to a specific outside diameter and wall thickness. The coupling is a threaded connection that is used to connect the casing to the drill string. The thread connection is a threaded connection that is used to connect the casing to the wellhead.

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Tubing is a small-diameter pipe that is used to transport oil and gas from the wellbore to the surface. It is made up of a tube, a coupling, and a thread connection. The tube is the main body of the tubing and is manufactured to a specific outside diameter and wall thickness. The coupling is a threaded connection that is used to connect the tubing to the drill string. The thread connection is a threaded connection that is used to connect the tubing to the wellhead.

OCTG is an essential component of the oil and gas industry and is used to transport oil and gas from the wellbore to the surface. It is manufactured in a variety of sizes, grades, and connections to meet the needs of the oil and gas industry.

understanding the different Types of OCTG: Drill Pipe, Steel Casing Pipe and Tubing

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