API 5CT Q125

API-5CT-Q125

API 5CT Q125

API 5CT Q125 oil well casing pipe and tubing is a type of steel pipe with special threads that are used in petroleum well drilling. The API 5CT Q125 oil well casing pipe and tubing is mainly used to protect the well wall from damage in order to ensure the normal operation of the well. The API 5CT Q125 oil well casing pipe and tubing are made of high-quality steel pipes. There are two types of API 5CT Q125 oil well casing pipes: casing pipes and tubing pipes. The API 5CT Q125 oil well casing pipe and tubing are widely used in the petroleum industry. They are used as casing and tubing for oil wells and protect the well walls from damage. The API 5CT Q125 oil well casing pipe and tubing can be used in different conditions, such as onshore and offshore drilling, high pressure and high temperature well drilling, deep well drilling, etc. API 5CT Q125 oil well casing pipe and tubing is an important part of OCTG (Oil Country Tubular Goods). OCTG is a type of steel pipes that are used in petroleum industry for extracting oil and gas from wells. API 5CT Q125 oil well casing pipe and tubing has good properties such as high strength, good

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Since 1998, Tianjin United Steel Pipe Co., Ltd (TUSPIPE) has been committed to supplying high-quality line pipes.

With over 500,000 tons annual production capacity, the company serves various fields and industries, such as oil & gas exploitation and transmission, ship & auto-building, water & electricity, environmental protection, mechanical engineering, infrastructure construction and etc.

TUSPIPE places a premium on product quality and rigorous product quality control. In order to maintain good product quality,  the company has established a Test & Inspection Center since 2004. With a series of state-of-the-art tests and inspection equipment, the test & inspection center is able to perform the tensile tests, hydro tests, impact tests, DWTT, etc.

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Product Description of API 5CT Q125

Product NameAPI-5CT Q125
SizeO. D.26.67-508mm
W. T.2.87-16.13mm
LengthR1(5.49-6.71m),R2(8.23-9.14m),R3(11.58-13.72m)
Type of End Finish1.Plain end
2.Short round thread
3.Long round thread
4.Buttress thread
Surface1.Black Painted
2.With oil
3.Bared or as per customers’ requirement
StandardAPI 5CT
ApplicationTube for conveying gas, water, and oil in both natural gas industries, etc.

Chemical Composition of API 5CT Q125

GradeTypeCMnMoCrNi max.Cu max.P max.S max.Si max.
min.max.min.max.min.max.min.max.
Q1251–0.35–1–0.75–1.20.99–0.020.01–
2–0.35 1 NL NL0.99–0.20.2 
3–0.5 1.9 NL NL0.99–0.30.2 
4–0.5 1.9 NL NL0.99–0.30.2 

Mechanical Analysis of API 5CT Q125

API 5CT Casing Pipe StandardAPI 5CT Casing Pipe TypeAPI 5CT Casing Pipe Tensile Strength
MPa
API 5CT Casing Pipe Yield Strength
MPa
Total elongation under load %
API SPEC 5CT Q1251月4日≥931862 ~ 10340

API 5CT Q125 Casing and Tubing Specifications

- Specification & Size of API 5CT Q125 Tubing

DNO. D.WeightW. T.End Processing
Non-upset coupling-threadUpset coupling-threadSteel Grade
inmmlb./ft.lb./ft.inmmH40J55L80N80C90T95P110
2 3/82.3860.34–0.1674.24PUPNPNPNPNPN–
4.64.70.194.83PNUPNUPNUPNUPNUPNUPNU
5.85.950.2546.45––PNUPNUPNUPNUPNU
6.6–0.2957.49––P–PP–
7.357.450.3368.53––PU–PUPU–
2 7/82.88736.46.50.2175.51PNUPNU–––––
7.87.90.2767.01–––––––
8.68.70.3087.82––PLBPLBPLBE–PLB
9.359.450.348.64––PLBPLBPLBE–PLB
10.5–0.3929.96––PLBPLBPLB–PLB
11.5–0.4411.18––––PLB– 
3 1/23.588.97.7–0.2165.49PNPNPNPNPNPN–
9.29.30.2546.45PNUPNUPNUPNUPNUPNUPNU
10.2–0.2897.34PNPNPNPNPNPN–
12.712.950.3759.52––PNUPNUPNUPNUPNU
14.3–0.4310.92––P–PP–
15.5–0.47612.09––P–PP–
17–0.5313.46––P–PP–
441029.5–0.2265.74PNPNPNPNPNPN–
–110.2626.65PUPUPUPUPUPU–
13.2–0.338.38––P–PP–
16.1–0.41510.54––P–PP–
18.9–0.512.7––P–PP–
22.2–0.6115.49––P–PP–
4 1/24.511412.612.750.2716.88PNUPNUPNUPNUPNUPNU–
15.2–0.3378.56––P–PP–
17–0.389.65––P–PP–
18.9–0.4310.92––P–PPPLB
21.5–0.512.7––P–PPPLB
23.7–0.5614.22––P–PPPLB
26.1–0.6316––P–PPPLB
P——Plain;N—— Non-upset coupling-thread;U—— Upset coupling-thread; L——Integral

- Specification & Size of API 5CT Q125 Casing

DNO. D.WeightW. T. End Machining Form
 Steel Grade
inmmlb/ftkg/minmmH40J55L80N80C90P110
K55T95
4 1/24.500114.39.514.140.2055.21PSPS––––
10.515.630.2245.69–PSB––––
11.617.260.2506.35–PSLBPLBPLBPLBPLB
13.520.090.2907.37––PLBPLBPLBPLB
15.122.470.3379.56–––––PLB
55.00012711.517.110.2205.59–PS––––
1319.350.2536.43–PSLB––––
1522.320.2967.52–PSLBPLBPLBPLBEPLB
1826.790.3629.19––PLBPLBPLBEPLB
21.431.850.43711.1––PLBPLBPLBPLB
23.234.530.47812.14––––PLB–
24.135.860.50012.7––––PLB–
5 1/25.500139.71420.830.2446.2PSPS––––
15.523.070.2756.98–PSLB––––
1725.30.3047.72–PSLBPLBPLBPLBEPLB
2029.760.3619.17––PLBPLBPLBEPLB
2334.230.41510.54––PLBPLBPLBEPLB
26.839.880.50012.7––––––
29.744.20.56214.27––––––
32.648.510.62515.88––––––
35.352.530.68717.45––––––
3856.550.75019.05––––––
40.560.270.81220.62––––––
43.164.140.87522.22––––––
6 5/86.625168.282029.760.2887.32PSPSLB––––
2435.720.3528.94–PSLBPLBPLBPLBEPLB
2841.670.41710.59––PLBPLBPLBEPLB
3247.620.47512.06––PLBPLBPLBEPLB
77.000177.81725.30.2315.87PS–––––
2029.760.2726.91PSPS––––
2334.230.3178.05–PSLBPLBPLBPLBE–
2638.690.3629.19–PSLBPLBPLBPLBEPLB
2943.160.40810.36––PLBPLBPLBEPLB
3247.620.45311.51––PLBPLBPLBEPLB
3552.090.49812.65––PLBPLBPLBEPLB
3856.550.54013.72––PLBPLBPLBEPLB
42.763.540.62515.88––––––
46.469.050.68717.45––––––
50.174.560.75019.05––––––
53.679.770.81220.62––––––
57.184.970.87522.22––––––
7 5/87.625193.682435.720.3007.62PS–––––
26.439.290.3288.33–PSLBPLBPLBPLBEPLB
29.744.20.3759.52––PLBPLBPLBEPLB
33.750.150.43010.92––PLBPLBPLBEPLB
3958.050.50012.7––PLBPLBPLBEPLB
42.863.690.56214.27––PLBPLBPLBPLB
45.367.410.59515.11––PLBPLBPLBPLB
47.170.090.62515.88––PLBPLBPLBPLB
51.276.190.68717.45––––––
55.380.30.75019.05––––––
8 5/88.625219.082435.720.2646.71–PS––––
2841.620.3047.72PS–––––
3247.620.3528.94PSPSLB––––
3653.570.40010.16–PSLBPLBPLBPLBEPLB
4059.530.45011.43––PLBPLBPLBEPLB
4465.480.50012.7––PLBPLBPLBEPLB
4972.920.55714.15––PLBPLBPLBEPLB
9 5/89.625244.4832.348.070.3127.92PS–––––
3653.570.3528.94PSPSLB––––
4059.530.39510.03–PSLBPLBPLBPLBE–
43.564.730.43511.05––PLBPLBPLBEPLB
4769.940.47211.99––PLBPLBPLBEPLB
53.579.620.54513.84––PLBPLBPLBEPLB
58.486.910.59515.11––PLBPLBPLBPLB
59.488.40.60915.47––––––
64.996.580.67217.07––––––
70.3104.620.73418.64––––––
75.6112.50.79720.24––––––
10 3/410.750273.0532.7548.740.2797.09PS–––––
40.560.270.3508.89PSPSB––––
15.567.710.40010.16–PSB––––
5175.90.45011.43–PSBPSBPSBPSBEPSB
55.582.590.49512.57––PSBPSBPSBEPSB
60.790.330.54513.84––––PSBEPSB
65.797.770.59515.11––––PSBPSB
73.2108.930.67217.07––––––
79.2117.860.73418.64––––––
85.3126.940.79720.24––––––
11 3/411.750 4262.50.3338.46PS–––––
4769.940.37520.24––––––
5480.360.4358.46––––––
6089.290.4899.53––––––
6596.730.53411.05––––––
71105.660.58214.42––––––
13 3/813.375339.734871.430.3308.38PS–––––
54.581.10.3809.65–PSB––––
6190.780.43010.92–PSB––––
68101.190.48012.19–PSBPSBPSBPSBPSB
72107.150.51413.06––PSBPSBPSBPSB
1616.000406.46596.730.3759.53PS–––––
75111.610.43811.13–PSB––––
84125.010.49512.57–PSB––––
109162.210.65616.66–PPP–P
18 5/818.625473.0887.5130.210.43511.05PSPSB––––
2020.00050894139.890.43811.13PSLPSLB––––
106.5158.490.50012.7–PSLB––––
133197.930.63516.13–PSLB––––
P——Plain;S——Short-thread;L——Long-thread;B——Buttress thread;E——Extreme thread
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