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API 5CT Casing

1. API SPEC 5CT Oil casing(casing)

Steel Grade：J55、K55、N80-1、N80-Q、L80-1、P110、Q125

Thread buckle type ：LC8rd、STC8rd、BTC

Size ：41/2"、5"、5-1/2"、6-5/8"、7"

Length ：R1(4.88m~7.62m)、R2(7.62m~10.36m)、R3(10.36m~12m)

2. API Spec 5CT Oil tubes(tubing)

Steel Grade：j55、k55、n80-1、n80-q、l80-1、p110

Thread buckle type：NUE 10RD、EUE8RD

Size：1.9"、2-3/8"、2-7/8"、3-1/2"、4-1/2"

Length：r1(6.1m~7.32m)、r2(8.53m~9.75m)

API 5CT Casing and Oil tubing

OCTG (Oil country tube goods) is a high-strength steel pipe used for crude oil and natural gas production, which has excellent corrosion resistance, internal stress, and corrosion cracking resistance. The OCTG products of Japanese steel are used as core components in onshore and overseas oil drilling sites in the Americas, Middle East, and other regions.

-Casting and Tubing are the core components of steel pipes used in oil wells, making a decisive contribution to ensuring the stability and production efficiency of the rig for extracting crude oil or natural gas.

-Casting is a steel pipe inserted into the drilling hole during the construction of oil and gas drilling sites, which supports the wall and prevents the collapse of the drilling hole. In addition, during the drilling process, it also plays a role in preventing external sediment or water from mixing with the crude oil being extracted.

-Tubing is a pipeline inserted inside a casing that directly transports underground crude oil or natural gas to the surface.

-China United Materials provides products to drilling sites of world-class energy companies by operating the Seamless steel pipe manufacturing process that meets strict quality standards required by OCTG products.

Petroleum casing products:

Petroleum casing, couplings, short joints, wound screen tubes, slotted screen tubes, bridge punching screen tubes, multi-layer composite screen tubes, drilling casing, etc

Table C.1- List of API casings (specifications, quality, wall thickness, steel grade, and corresponding end processing)

Size		O.D (mm)	weight （kg/m）	W.T （t/mm）	Type of End-Finis h
Size					H40	J55 K55	M65	L80 C95	N80 1、Q	C90 T95	P110	Q125
A	B				H40	J55 K55	M65	L80 C95	N80 1、Q	C90 T95	P110	Q125
1	2	3	4	5	6	7	8	9	10	11	12	13
4-1/2 4-1/2 4-1/2 4-1/2 4-1/2	9.50 10.50 11.60 13.50 15.10	114.30 114.30 114.30 114.30 114.30	14.38 15.73 17.38 19.87 22.69	5.21 5.69 6.35 7.37 8.56	PS - - - -	PS PSB PSLB - -	- - PLB PLB -	- - PLB PLB -	- - PLB PLB -	- - P P -	- - PLB PLB PLB	- - - - PLB
5 5 5 5 5 5 5	11.50 13.00 15.00 18.00 21.40 23.20 24.10	127.00 127.00 127.00 127.00 127.00 127.00 127.00	17.19 19.69 22.69 26.19 32.13 34.76 36.15	5.59 6.43 7.52 9.19 11.10 12.14 12.70	- - - - - - -	PS PSLB PSLB - - - -	- - PLB PLB PLB PLB PLB	- - PLB PLB PLB PLB PLB	- - PLB PLB PLB PLB PLB	- - P P P P P	- - PLB PLB PLB PLB PLB	- - PLB PLB PLB PLB PLB
5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2 5-1/2	14.00 15.50 17.00 20.00 23.00 26.80 29.70 32.60 35.30 38.00 40.50 43.10	139.70 139.70 139.70 139.70 139.70 139.70 139.70 139.70 139.70 139.70 139.70 139.70	20.91 23.48 25.72 30.05 34.05 40.15 44.47 48.74 52.80 56.82 60.64 64.41	6.20 6.98 7.72 9.17 10.54 12.70 14.27 15.88 17.45 19.05 20.62 22.22	PS - - - - - - - - - - -	PS PSLB PSLB - - - - - - - - -	- - PLB PLB PLB - - - - - - -	- - PLB PLB PLB - - - - - - -	- - PLB PLB PLB - - - - - - -	- - PLB PLB PLB P P P P P P P	- - P P P P P P P P P P	- - - - PLB - - - - - - -
6-5/8 6-5/8 6-5/8 6-5/8	20.00 24.00 28.00 32.00	168.28 168.28 168.28 168.28	29.76 35.72 41.67 47.62	7.32 8.94 10.59 12.06	PS - - -	- - - -	- PLB PLB PLB	- PLB PLB PLB	- PLB PLB PLB	- P P P	- PLB PLB PLB	- - - PLB
7 7 7 7 7 7 7	17.00 20.00 23.00 26.00 29.00 32.00 35.00	177.80 177.80 177.80 177.80 177.80 177.80 177.80	25.60 29.91 34.67 39.14 43.60 47.92 52.09	5.87 6.91 8.05 9.19 10.36 11.51 12.65	PS PS - - - - -	- PS PSLB PSLB - - -	- PS PLB PLB PLB PLB PLB	- - PLB PLB PLB PLB PLB	- - PLB PLB PLB PLB PLB	- - P P P P P	- - - PLB PLB PLB PLB	- - - - - - PLB
7 7 7 7 7 7	38.00 42.70 46.40 50.10 53.60 57.10	177.80 177.80 177.80 177.80 177.80 177.80	56.10 63.84 69.35 74.85 80.21 85.42	13.72 15.88 17.45 19.05 20.62 22.22	- - - - - -	- - - - - -	PLB - - - - -	PLB - - - - -	PLB P P P P P	P P P P P P	PLB - - - - -	PLB - - - - -
7-5/8 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8	24.00 26.40 29.70 33.70 39.00 42.80 45.30 47.10 51.20 55.30	193.68 193.68 193.68 193.68 193.68 193.68 193.68 193.68 193.68 193.68	35.72 39.29 44.20 50.15 58.04 63.69 67.41 70.09 76.19 82.30	7.62 8.33 9.52 10.92 12.70 14.27 15.11 15.88 17.45 19.05	PS - - - - - - - - -	- PSLB - - - - - - - -	- PLB PLB PLB PLB PLB PLB PLB - -	- PLB PLB PLB PLB PLB PLB PLB - -	- PLB PLB PLB PLB PLB PLB PLB P P	- P P P P P P P P P	- - PLB PLB PLB PLB PLB PLB - -	- - - - PLB PLB PLB PLB - -
7-3/4	46.10	196.85	68.60	15.11	-	-	-	P	P	P	P	P
8-5/8 8-5/8 8-5/8 8-5/8 8-5/8 8-5/8 8-5/8	24.00 28.00 32.00 36.00 40.00 44.00 49.00	219.08 219.08 219.08 219.08 219.08 219.08 219.08	35.72 41.67 47.62 53.57 59.53 65.48 72.92	6.71 7.72 8.94 10.16 11.43 12.70 14.15	- PS PS - - - -	PS - PSLB PSLB - - -	- - - PLB PLB PLB PLB	- - - PLB PLB PLB PLB	- - - PLB PLB PLB PLB	- - - P P P P	- - - - PLB PLB PLB	- - - - - PLB
9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8 9-5/8	32.30 36.00 40.00 43.50 47.00 53.50 58.40 59.40 64.90 70.30 75.60	244.48 244.48 244.48 244.48 244.48 244.48 244.48 244.48 244.48 244.48 244.48	48.07 53.57 59.53 64.73 69.94 79.62 86.91 88.40 96.58 104.62 112.50	7.92 8.94 10.03 11.05 11.99 13.84 15.11 15.47 17.07 18.64 20.24	PS PS - - - - - - - - -	- PSLB PSLB - - - - - - - -	- - PLB PLB PLB PLB PLB - - -	- - PLB PLB PLB PLB PLB - - - -	- - PLB PLB PLB PLB PLB - - - -	- - P P P P P P P P P	- - - PLB PLB PLB PLB - - - -	- - - - PLB PLB PLB - - - -
10-3/4 10-3/4 10-3/4 10-3/4 10-3/4 10-3/4 10-3/4	32.75 40.50 45.50 51.00 55.50 60.70 65.70	273.05 273.05 273.05 273.05 273.05 273.05 273.05	48.74 60.27 67.71 75.90 82.59 90.33 97.77	7.09 8.89 10.16 11.43 12.57 13.84 15.11	PS PS - - - - -	- PSB PSB PSB PSB - -	- - - PSB PSB - -	- - - PSB PSB - -	- - - PSB PSB PSB PSB	- - - P P P P	- - - PSB PSB PSB PSB	- - - - - PSB PSB
10-3/4 10-3/4 10-3/4	73.20 79.20 85.30	273.05 273.05 273.05	108.93 117.86 126.94	17.07 18.64 20.24	- - -	- - -	- - -	- - -	P P P	P P P	- - -	- - -
11-3/4 11-3/4 11-3/4 11-3/4 11-3/4 11-3/4	42.00 47.00 54.00 60.00 65.00 71.00	298.45 298.45 298.45 298.45 298.45 298.45	62.50 69.94 80.36 89.29 96.73 105.66	8.46 9.53 11.05 12.42 13.56 14.78	PS - - - - -	PSB PSB PSB PSB - -	- - - PSB P P	- - - PSB P P	- - - PSB P P	- - - P P P	- - - PSB P P	- - - PSB P P
13-3/8 13-3/8 13-3/8 13-3/8 13-3/8	48.00 54.50 61.00 68.00 72.00	339.72 339.72 339.72 339.72 339.72	71.43 81.10 90.78 101.19 107.15	8.38 9.65 10.92 12.19 13.06	PS - - - -	- PSB PSB PSB -	- - - PSB PSB	- - - PSB PSB	- - - PSB PSB	- - - P P	- - - PSB PSB	- - - - PSB
16 16 16 16	65.00 75.00 84.00 109.00	406.40 406.40 406.40 406.40	96.73 111.61 125.01 162.21	9.53 11.13 12.57 16.66	PS - - -	- PSB PSB P	- - - P	- - - P	- - - -	- - - -	- - - P	- - - P
18-5/8	87.50	473.08	130.21	11.05	PS	PSB	-	-	-	-	-	-
20 20 20	94.00 106.50 133.00	508.00 508.00 508.00	139.89 158.49 197.93	11.13 12.70 16.13	PSL - -	PSLB PSLB PSLB	- - -	- - -	- - -	- - -	- - -	- - -
备注：P平端；S短圆螺纹；L长圆形线程；B偏梯形螺纹；极线
a 代号供订货时参考和辅助。 b 所示名义单位长度质量（第 4 栏）仅供参考。 c 马氏体型铬钢(L80-9Cr和13Cr)的密度不同于碳钢，所示质量对马氏体型铬钢来说不是精确值，可用质量修正系数0.989 d 偏梯形螺纹套管可带标准接箍、特殊间隙接箍或具有特殊倒角的特殊间隙接箍供货。 e 对于带S、L、B螺纹的套管，按照本标准5.2.3，8.2条款和API 5B的要求，允许中间壁厚。

Type of End-Finish

O.D：42.16 MM-508 MM(1.66"--20")

Grade：H40, J55, K55, N80-1, N80-Q, L80-1,L80-9Cr, L80-13Cr, P110, Q125

Execution standards：API 5CT, GB, ISO11960, GOST

Premium tubing：STC, LTC, BTC, XC and Premium connection

NDE：NDT etc related rules of API 5CT and 5B

Type：Seamless and Welded

※ Please refer to the catalog for detailed product specifications.

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