OCTG Casing and Tubing Pipe Dimensions & Specificaitons
Understanding OCTG casing and Tubing Pipe Dimensions & Specifications: A Comprehensive Guide for Oil and Gas Professionals
Oil and gas professionals need to understand OCTG casing and tubing pipe dimensions and specifications in order to ensure a successful operation. This comprehensive guide provides an overview of the key dimensions and specifications for OCTG casing and tubing pipes used in oil and gas operations.
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OCTG stands for Oil Country Tubular Goods, which is a family of Seamless rolled products consisting of drill pipe, casing and tubing subjected to loading conditions according to their specific application. Casing and tubing are the main components of the well construction. Casing is used to line the walls of the wellbore and prevent the wellbore from collapsing, while tubing is used to transport oil and gas from the producing formation to the surface.
Casing and tubing pipe dimensions and specifications are based on the size, Weight, grade, connection type, and Wall thickness of the pipe. The size of the pipe is identified by its outer diameter (OD). The weight of the pipe is identified by its wall thickness, which is measured in inches. The grade of the pipe is identified by its Yield strength, which is measured in pounds per square inch (psi). The connection type of the pipe is identified by its thread type, which can be either external or internal.
Labels a
Calculated Mass c
Nominal Linear Mass T& C b,c
Wall Thick- ness
em, Mass Gain or Loss Due to End Finishing d
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
13 3/8
48
339.72
71.43
8.38
322.96
318.99
68.48
15.04
—
— 17.91
—
13 3/8
54.5
339.72
81.1
9.65
320.42
316.45
78.55
13.88
—
16.44
—
13 3/8
61
339.72
90.78
10.92
317.88
313.91
88.55
12.74
—
14.97
—
13 3/8
68
339.72
101.19
12.19
315.34
311.37
98.46
11.61
—
14.97
—
13 3/8
68
339.72
101.19
12.19
315.34
311.37
98.46
11.67 f
—
14.33
—
13 3/8
72
339.72
107.15
13.06
313.6
311.15 e
105.21
10.98
—
13.98
—
13 3/8
72
339.72
107.15
13.06
313.6
311.15 e 309.63 309.63
105.21
10.91 f
—
14.33
—
13 3/8
72
339.72
107.15
13.06
313.6
105.21
10.98
—
13.98
—
13 3/8
72
339.72
107.15
13.06
313.6
105.21
10.91 e
—
—
16
65
406.4
96.73
9.53
387.4
382.57
96.73
18.59
—
— 20.13
—
16
75
406.4
111.61
11.13
384.1
379.37
108.49
16.66
—
18.11
—
16
84
406.4
125.01
12.57
381.3
376.48
122.09
14.92
—
—
—
16
109
406.4
162.21
16.66
373.1
368.3
160.13
—
—
—
18 5/8
87.5
473.08
130.21
11.05
450.98
446.22
125.91
33.6
—
39.25
—
20
94
508
139.89
11.13
485.7
480.97
136.38
20.5
27.11
24.78
—
20
94
508
139.89
11.13
485.7
480.97
136.38
20.61
27.26 g 24.27 17.84
24.78
—
20
106.5
508
158.49
12.7
482.6
477.82
155.13
18.22
22
—
20
133
508
197.93
16.13
475.7
470.97
195.66
13.03
16.02
—
NOTE See also Figures D.1, D.2, and D.3.
a Labels are for information and assistance in ordering.
b Nominal linear masses, threaded and coupled (Column 4) are shown for information only.
c The densities of martensitic chromium steels ( L80 Types 9Cr and 13Cr) are less than those of carbon steels; The masses shown are therefore not accurate for martensitic chromium steels; A mass correction factor of 0.989 shall be used.
d Mass gain or loss due to end finishing; See 8.5.
e Drift diameter for most common bit size; This drift diameter shall be specified in the purchase agreement and marked on the pipe; See 8.10 for drift requirements.
f Based on 758 mPa minimum yield strength or greater.
g Based on 379 mPa minimum yield strength.
In addition to the dimensions and specifications of the pipe, there are other important factors to consider when selecting OCTG casing and tubing pipes. These include the type of Material used, the Corrosion resistance of the material, the maximum operating temperature, and the maximum Pressure rating.
By understanding the key dimensions and specifications of OCTG casing and tubing pipes, oil and gas professionals can ensure that their operations are successful. This comprehensive guide provides an overview of the key dimensions and specifications for OCTG casing and tubing pipes used in oil and gas operations.
Casing and tubing pipe dimensions and specifications are based on the size, Weight, grade, connection type, and Wall thickness of the pipe. The size of the pipe is identified by its outer diameter (OD). The weight of the pipe is identified by its wall thickness, which is measured in inches. The grade of the pipe is identified by its Yield strength, which is measured in pounds per square inch (psi). The connection type of the pipe is identified by its thread type, which can be either external or internal.
