Steel casing pipe is a vital component installed in a drilling wellbore. Its primary purpose is to stabilize the wellbore wall, prevent collapse, protect fluid channels, and extend the overall service life of the well system.
These pipes are commonly used in oil and gas drilling, water wells, geothermal wells, and structural protection projects, where strength, sealing performance, and corrosion resistance are critical.
Common Types of Steel Casing Pipe
1. Welded Steel Casing Pipe
Welded casing pipe is manufactured by joining steel plates or coils through welding.
Advantages: High strength, tight sealing, cost-effective for large diameters.
Applications: Used in natural gas pipelines and projects requiring permanent, sealed connections.
Limitation: Difficult to disassemble once installed.
2. Seamless Steel Casing Pipe
Seamless casing pipe is produced without welds, providing a smooth surface and uniform wall thickness.
Advantages: Excellent pressure resistance, corrosion resistance, and reliability.
Applications: Commonly used in tap water systems, natural gas pipelines, and high-pressure environments.
3. Galvanized Steel Casing Pipe
Galvanized casing pipes are coated with zinc to improve corrosion resistance.
Advantages: Outstanding rust prevention and long service life.
Applications: Ideal for outdoor drainage systems, wall penetration protection, and communication cable shielding.
Steel Casing Pipe Specifications
|
Parameter
|
Specification
|
|
Size Range
|
1/2" – 24"
|
|
Length
|
1 m, 6 m, 6.4 m, 12 m, 13 m
|
|
Material Grades
|
API 5CT J55 / K55, N80-1
|
|
Coatings
|
Liquid Epoxy, Polyurethane, Fusion-Bonded Epoxy (FBE)
|
|
International Standards
|
API 5CT, IS 5433, ISO 11960, SY/T 6194, GB/T 9711.1
|
|
Connection Types
|
BTC, EUE, NUE
|
|
Typical Applications
|
Oil well casing, natural gas pipelines, geothermal wells, water wells, structural protection
|
API 5CT Spec Steel Casing Pipe Weight Chart
|
OD
(in)
|
OD
(mm)
|
Weight
(lbs/ft)
|
ID
(inches)
|
ID
(mm)
|
Drift
(inches)
|
Drift
(mm)
|
Capacity
(bbl/100ft)
|
|
4 1/2
|
114.30
|
26.50
|
3.240
|
82.30
|
3.115
|
79.12
|
1.02
|
|
24.60
|
3.380
|
85.85
|
3.255
|
82.68
|
1.11
|
|
21.60
|
3.500
|
88.90
|
3.375
|
85.73
|
1.19
|
|
18.80
|
3.640
|
92.46
|
3.515
|
89.28
|
1.29
|
|
17.70
|
3.696
|
93.88
|
3.571
|
90.70
|
1.33
|
|
16.90
|
3.740
|
95.00
|
3.615
|
91.82
|
1.36
|
|
16.60
|
3.754
|
95.35
|
3.629
|
92.18
|
1.37
|
|
15.10
|
3.826
|
97.18
|
3.701
|
94.01
|
1.42
|
|
13.50
|
3.920
|
99.57
|
3.795
|
96.39
|
1.49
|
|
12.60
|
3.958
|
100.53
|
3.833
|
97.36
|
1.52
|
|
11.60
|
4.000
|
101.60
|
3.875
|
98.43
|
1.55
|
|
10.50
|
4.052
|
102.92
|
3.927
|
99.75
|
1.59
|
|
9.50
|
4.090
|
103.89
|
3.965
|
100.71
|
1.63
|
|
OD
(in)
|
OD
(mm)
|
Weight
(lbs/ft)
|
ID
(inches)
|
ID
(mm)
|
Drift
(inches)
|
Drift
(mm)
|
Capacity
(bbl/100ft)
|
|
5
|
127.00
|
32.00
|
3.620
|
91.95
|
3.495
|
88.77
|
1.27
|
|
26.70
|
3.876
|
98.45
|
3.751
|
95.28
|
1.46
|
|
24.20
|
4.000
|
101.60
|
3.875
|
98.43
|
1.55
|
|
23.20
|
4.044
|
102.72
|
3.919
|
99.54
|
1.59
|
|
21.40
|
4.126
|
104.80
|
4.001
|
101.63
|
1.65
|
|
20.80
|
4.156
|
105.56
|
4.031
|
102.39
|
1.68
|
|
20.30
|
4.184
|
106.27
|
4.059
|
103.10
|
1.70
|
|
18.00
|
4.276
|
108.61
|
4.151
|
105.44
|
1.78
|
|
15.00
|
4.408
|
111.96
|
4.283
|
108.79
|
1.89
|
|
13.00
|
4.494
|
114.15
|
4.369
|
110.97
|
1.96
|
|
11.50
|
4.560
|
115.82
|
4.435
|
112.65
|
2.02
|
|
OD
(in)
|
OD
(mm)
|
Weight
(lbs/ft)
|
ID
(inches)
|
ID
(mm)
|
Drift
(inches)
|
Drift
(mm)
|
Capacity
(bbl/100ft)
|
|
5 1/2
|
139.70
|
39.30
|
4.044
|
102.72
|
3.919
|
99.54
|
1.59
|
|
36.40
|
4.090
|
103.89
|
3.965
|
100.71
|
1.62
|
|
32.30
|
4.276
|
108.61
|
4.151
|
105.44
|
1.78
|
|
29.70
|
4.376
|
111.15
|
4.251
|
107.98
|
1.86
|
|
28.40
|
4.440
|
112.78
|
4.315
|
109.60
|
1.91
|
|
26.00
|
4.548
|
115.52
|
4.423
|
112.34
|
2.01
|
|
23.00
|
4.670
|
118.62
|
4.545
|
115.44
|
2.12
|
|
20.00
|
4.778
|
121.36
|
4.653
|
118.19
|
2.22
|
|
17.00
|
4.892
|
124.26
|
4.767
|
121.08
|
2.32
|
|
15.50
|
4.950
|
125.73
|
4.825
|
122.56
|
2.38
|
|
14.00
|
5.012
|
127.30
|
4.887
|
124.13
|
2.44
|
|
13.00
|
5.044
|
128.12
|
4.919
|
124.94
|
2.47
|
|
OD
(in)
|
OD
(mm)
|
Weight
(lbs/ft)
|
ID
(inches)
|
ID
(mm)
|
Drift
(inches)
|
Drift
(mm)
|
Capacity
(bbl/100ft)
|
|
6
|
152.40
|
26.00
|
5.007
|
127.18
|
4.882
|
124.00
|
2.56
|
|
23.00
|
5.115
|
129.92
|
4.990
|
126.75
|
2.67
|
|
20.00
|
5.227
|
132.77
|
5.102
|
129.58
|
2.78
|
|
18.00
|
5.299
|
134.59
|
5.174
|
131.41
|
2.86
|
|
15.00
|
5.399
|
137.13
|
5.274
|
134.00
|
2.98
|
|
OD
(in)
|
OD
(mm)
|
Weight
(lbs/ft)
|
ID
(inches)
|
ID
(mm)
|
Drift
(inches)
|
Drift
(mm)
|
Capacity
(bbl/100ft)
|
|
6 5/8
|
166.28
|
69.63
|
4.375
|
111.13
|
4.250
|
107.95
|
1.86
|
|
43.20
|
5.250
|
133.35
|
5.125
|
130.17
|
2.81
|
|
35.00
|
5.450
|
138.43
|
5.325
|
135.25
|
3.02
|
|
32.00
|
5.550
|
140.97
|
5.425
|
137.79
|
3.13
|
|
28.00
|
5.666
|
143.92
|
5.541
|
140.74
|
3.26
|
|
24.00
|
5.796
|
147.22
|
5.671
|
144.04
|
3.41
|
|
20.00
|
5.924
|
150.47
|
5.799
|
147.29
|
3.55
|
|
17.00
|
6.010
|
152.65
|
5.885
|
149.47
|
3.66
|
|
OD
(in)
|
OD
(mm)
|
Weight
(lbs/ft)
|
ID
(inches)
|
ID
(mm)
|
Drift
(inches)
|
Drift
(mm)
|
Capacity
(bbl/100ft)
|
|
7
|
177.80
|
66.50
|
5.040
|
128.02
|
4.915
|
124.84
|
2.47
|
|
58.00
|
5.240
|
133.10
|
5.115
|
129.92
|
2.67
|
|
56.10
|
5.376
|
136.55
|
5.251
|
133.38
|
2.81
|
|
49.50
|
5.540
|
140.72
|
5.415
|
137.54
|
2.98
|
|
45.40
|
5.660
|
143.76
|
5.535
|
140.59
|
3.11
|
|
44.00
|
5.720
|
145.29
|
5.595
|
142.11
|
3.18
|
|
42.70
|
5.750
|
146.05
|
5.625
|
142.88
|
3.21
|
|
41.00
|
5.820
|
147.83
|
5.695
|
144.65
|
3.29
|
|
38.00
|
5.920
|
150.37
|
5.795
|
147.19
|
3.40
|
|
35.00
|
6.004
|
152.50
|
5.879
|
149.33
|
3.50
|
|
32.00
|
6.094
|
154.79
|
5.969
|
151.61
|
3.61
|
|
29.00
|
6.184
|
157.07
|
6.059
|
153.90
|
3.71
|
|
26.00
|
6.276
|
159.41
|
6.151
|
156.24
|
3.83
|
|
23.00
|
6.366
|
161.70
|
6.241
|
158.52
|
3.94
|
|
20.00
|
6.456
|
163.98
|
6.331
|
160.81
|
4.05
|
|
17.00
|
6.538
|
166.07
|
6.413
|
162.89
|
4.15
|
|
OD
(in)
|
OD
(mm)
|
Weight
(lbs/ft)
|
ID
(inches)
|
ID
(mm)
|
Drift
(inches)
|
Drift
(mm)
|
Capacity
(bbl/100ft)
|
|
7 5/8
|
193.68
|
52.80
|
6.201
|
157.81
|
6.000
|
152.40
|
3.74
|
|
55.75
|
6.176
|
156.87
|
6.000
|
152.40
|
3.74
|
|
51.20
|
6.249
|
158.72
|
6.125
|
155.58
|
3.80
|
|
47.10
|
6.375
|
161.93
|
6.250
|
158.75
|
3.95
|
|
45.30
|
6.435
|
163.45
|
6.310
|
160.27
|
4.02
|
|
42.80
|
6.501
|
165.13
|
6.376
|
161.95
|
4.11
|
|
46.10
|
6.560
|
166.62
|
6.500
|
165.10
|
4.18
|
|
39.00
|
6.625
|
168.28
|
6.500
|
165.10
|
4.26
|
|
33.70
|
6.765
|
171.83
|
6.640
|
168.66
|
4.45
|
|
29.70
|
6.875
|
174.63
|
6.750
|
171.45
|
4.59
|
|
26.40
|
6.969
|
177.01
|
6.844
|
173.84
|
4.72
|
|
24.00
|
7.025
|
178.44
|
6.900
|
175.26
|
4.79
|
|
20.00
|
7.125
|
180.98
|
7.000
|
177.80
|
4.93
|
|
OD
(in)
|
OD
(mm)
|
Weight
(lbs/ft)
|
ID
(inches)
|
ID
(mm)
|
Drift
(inches)
|
Drift
(mm)
|
Capacity
(bbl/100ft)
|
|
8 5/8
|
219.08
|
52.00
|
7.435
|
188.85
|
7.310
|
185.67
|
5.37
|
|
49.00
|
7.511
|
190.78
|
7.386
|
187.60
|
5.48
|
|
44.00
|
7.625
|
193.68
|
7.500
|
190.50
|
5.65
|
|
7.636
|
193.95
|
7.500
|
190.50
|
5.66
|
5.66
|
|
40.00
|
7.725
|
196.22
|
7.600
|
193.04
|
5.80
|
|
36.00
|
7.825
|
198.76
|
7.700
|
195.58
|
5.95
|
|
32.00
|
7.921
|
201.19
|
7.796
|
198.02
|
6.09
|
|
28.00
|
8.017
|
203.63
|
7.892
|
200.46
|
6.24
|
|
24.00
|
8.097
|
205.66
|
7.972
|
202.49
|
6.37
|
|
OD
(in)
|
OD
(mm)
|
Weight
(lbs/ft)
|
ID
(inches)
|
ID
(mm)
|
Drift
(inches)
|
Drift
(mm)
|
Capacity
(bbl/100ft)
|
|
9 5/8
|
244.48
|
71.80
|
8.125
|
206.38
|
7.969
|
202.41
|
6.41
|
|
70.30
|
8.157
|
207.19
|
8.001
|
203.23
|
6.46
|
|
64.90
|
8.281
|
210.34
|
8.125
|
206.38
|
6.66
|
|
61.10
|
8.375
|
212.73
|
8.219
|
208.76
|
6.81
|
|
59.40
|
8.407
|
213.54
|
8.251
|
209.58
|
6.87
|
|
58.40
|
8.435
|
214.25
|
8.279
|
210.29
|
6.91
|
|
53.50
|
8.535
|
216.79
|
8.379
|
212.83
|
7.08
|
|
59.20
|
8.560
|
217.42
|
8.500
|
215.90
|
7.12
|
|
47.00
|
8.681
|
220.50
|
8.525
|
216.54
|
7.32
|
|
62.80
|
8.625
|
219.08
|
8.500
|
215.90
|
7.23
|
|
43.50
|
8.755
|
222.38
|
8.599
|
218.41
|
7.45
|
|
40.00
|
8.835
|
224.41
|
8.679
|
220.45
|
7.58
|
|
38.00
|
8.885
|
225.68
|
8.760
|
222.50
|
7.67
|
|
36.00
|
8.921
|
226.59
|
8.765
|
222.63
|
7.73
|
|
32.30
|
9.001
|
228.63
|
8.845
|
224.66
|
7.87
|
|
29.30
|
9.063
|
230.20
|
8.907
|
226.24
|
7.98
|
|
OD
(in)
|
OD
(mm)
|
Weight
(lbs/ft)
|
ID
(inches)
|
ID
(mm)
|
Drift
(inches)
|
Drift
(mm)
|
Capacity
(bbl/100ft)
|
|
10 3/4
|
273.05
|
81.00
|
9.094
|
230.99
|
8.31
|
211.06
|
6.41
|
|
79.20
|
9.126
|
231.80
|
8.37
|
212.61
|
6.50
|
|
76.00
|
9.194
|
233.53
|
8.49
|
215.27
|
6.72
|
|
73.20
|
9.250
|
234.95
|
8.59
|
218.19
|
7.02
|
|
71.10
|
9.294
|
236.07
|
8.67
|
220.17
|
7.28
|
|
65.70
|
9.404
|
238.86
|
8.88
|
225.69
|
8.02
|
|
60.70
|
9.504
|
241.40
|
9.06
|
230.13
|
8.31
|
|
55.50
|
9.604
|
243.94
|
9.25
|
234.32
|
8.59
|
|
51.00
|
9.694
|
246.23
|
9.42
|
238.65
|
8.88
|
|
45.50
|
9.794
|
248.77
|
9.62
|
244.13
|
9.02
|
|
40.50
|
9.894
|
251.31
|
9.81
|
249.51
|
9.35
|
|
35.75
|
10.136
|
257.45
|
9.98
|
254.78
|
9.70
|
|
32.75
|
10.192
|
258.88
|
10.09
|
256.85
|
9.98
|
|
OD
(in)
|
OD
(mm)
|
Weight
(lbs/ft)
|
ID
(inches)
|
ID
(mm)
|
Drift
(inches)
|
Drift
(mm)
|
Capacity
(bbl/100ft)
|
|
11 3/4
|
298.45
|
95.00
|
9.968
|
253.19
|
9.812
|
249.26
|
9.96
|
|
87.20
|
10.126
|
257.20
|
9.970
|
253.19
|
10.27
|
|
83.00
|
10.212
|
259.38
|
10.056
|
255.20
|
10.44
|
|
80.50
|
10.282
|
261.16
|
10.126
|
257.20
|
10.44
|
|
79.00
|
10.344
|
262.74
|
10.188
|
258.67
|
10.58
|
|
76.00
|
10.358
|
263.09
|
10.202
|
259.03
|
10.71
|
|
75.00
|
10.376
|
263.55
|
10.220
|
259.51
|
10.74
|
|
73.60
|
10.430
|
264.92
|
10.274
|
260.82
|
10.78
|
|
71.00
|
10.526
|
267.36
|
10.370
|
263.40
|
10.89
|
|
66.70
|
10.616
|
269.65
|
10.460
|
265.66
|
11.03
|
|
65.00
|
10.724
|
272.39
|
10.568
|
268.11
|
11.08
|
|
60.00
|
10.844
|
275.44
|
10.688
|
271.39
|
11.27
|
|
54.00
|
10.880
|
276.35
|
10.724
|
272.39
|
11.50
|
|
47.00
|
11.000
|
279.40
|
10.844
|
275.44
|
11.75
|
|
71.80
|
10.711
|
272.06
|
10.625
|
269.88
|
11.00
|
|
42.00
|
11.084
|
281.53
|
10.928
|
277.57
|
11.93
|
|
38.00
|
11.150
|
283.21
|
10.994
|
279.25
|
12.08
|
Note:
The data listed above represents only common weight ranges. Actual specifications vary depending on wall thickness, outer diameter, and material grade.
To quickly estimate the weight during pipe selection or quotation, engineers can use the steel casing pipe weight calculation formula for accurate results.
1. Effect on Pressure-Bearing Capacity and Strength
The weight of a steel casing pipe directly reflects its wall thickness and structural strength.
Heavier casing pipes generally have thicker walls, providing greater resistance to compression, bending, and deformation.
This enhanced strength helps prevent wellbore collapse and ensures long-term stability in deep or high-pressure wells.
2. Effect on Construction and Installation
Pipe weight also influences construction efficiency and installation difficulty.
Heavier steel casing pipes require more powerful lifting and handling equipment, increasing installation complexity and operational costs.
Lightweight casing pipes, on the other hand, are easier to transport, hoist, and lower into the wellbore — ideal for shallow wells, temporary applications, or budget-conscious projects.
3. Effect on Transportation and Overall Cost
Steel usage significantly impacts logistics and material expenses.
Heavier pipes consume more steel, increasing material, transportation, and handling costs.
Lighter pipes reduce overall system weight, making them more cost-effective for short-distance transport or lower-pressure projects.
4. Effect on Service Life and Sealing Performance
Weight also correlates with durability and sealing integrity.
Thicker-walled casing pipes offer superior corrosion resistance, wear resistance, and joint sealing performance, minimizing leak risks.
This contributes to a longer service life and improved reliability, particularly in harsh or corrosive environments.
Conclusion
Steel casing pipe weight is a critical factor that influences a project’s strength, installation difficulty, cost, and service life.
Understanding the weight characteristics allows engineers to:
Select the right casing type during the design phase
Balance safety, cost-effectiveness, and ease of installation
Reduce construction risks through proper material planning
When choosing casing pipes, engineers should evaluate factors such as pressure requirements, well depth, environmental conditions, and budget to achieve the optimal combination of safety, performance, and efficiency.
For more: Casing Pipe Size Chart
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