API-5CT Casing

Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or wellbore. It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow drilling fluid to circulate and extraction to take place.

Standard API SPEC 5CT、ISO 11960-2004、GB/T 19830-2011.

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

Thread type:STC, LTC, BTC;

API:casing
Specification			Steel class								Standard
Specification			Steel class								Standard
OD mm(in)	thickness mm	Nominal weight(with thread and coupling)kg/m	H40	J55、K55	M65	L80、C95	N80-1类、Q	C90、T95	P110	Q125
114.30 (4-1/2)	5.21	14.14	P/S	P/S	P/S						API 5CT-2008
	5.69	15.63		P/S/B	P/S/B
	6.35	17.26		P/S/L/B	P/L/B	P/L/B	P/L/B	P/L/B	P/L/B
	7.37	20.09			P/L/B	P/L/B	P/L/B	P/L/B	P/L/B
	8.56	22.47							P/L/B	P/L/B
127.00(5)	5.59	17.11		P/S	P/S
	6.43	19.35		P/S/L/B	P/S/L/B
	7.52	22.32		P/S/L/B/E	P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	9.19	26.79			P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	11.10	31.85			P/L/B	P/L/B	P/L/B	P/L/B	P/L/B	P/L/B
	12.14	34.53				P/L/B	P/L/B	P/L/B	P/L/B	P/L/B
	12.70	35.86				P/L/B	P/L/B	P/L/B	P/L/B	P/L/B
139.70 (5-1/2)	6.20	20.83	P/S	P/S	P/S
	6.98	23.07		P/S/L/B/E	P/S/L/B
	7.72	25.30		P/S/L/B/E	P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	9.17	29.76			P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	10.54	34.23			P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	12.70	39.88						P
	14.27	44.20						P
	15.88	48.51						P
	17.45	52.53						P
	19.05	56.55						P
	20.62	60.27						P
	22.22	61.14						P
168.28 (6-5/8)	7.32	29.76	P/S	P/S/L/B	P/S/L/B
	8.94	35.72		P/S/L/B/E	P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	10.59	41.67			P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	12.06	47.62				P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
177.80(7)	5.87	25.30	P/S
	6.91	29.76	P/S	P/S	P/S
	8.05	34.23		P/S/L/B/E	P/L/B	P/L/B/E	P/L/B/E	P/L/B/E
	9.19	38.69		P/S/L/B/E	P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	10.36	43.16			P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	11.51	47.62			P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	12.65	52.09				P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	13.72	56.55				P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	15.88	63.54						P
	17.45	69.05						P
	19.05	74.56						P
	20.62	79.77						P
	22.22	84.97						P
193.68 (7-5/8)	7.62	35.72	P/S
	8.33	39.29		P/S/L/B/E	P/S/L/B	P/L/B/E	P/L/B/E	P/L/B/E
	9.52	44.20			P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	10.92	50.15			P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	12.70	58.04				P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	14.27	63.69				P/L/B	P/L/B	P/L/B	P/L/B	P/L/B
	15.11	67.41				P/L/B	P/L/B	P/L/B	P/L/B	P/L/B
	15.88	70.09				P/L/B	P/L/B	P/L/B	P/L/B	P/L/B
	17.45	76.19						P
	19.05	82.30						P
196.85 (7-3/4)	15.11	68.60				P	P	P	P	P
219.08 (8-5/8)	6.71	35.72		P/S	P/S
	7.72	41.67	P/S		P/S
	8.94	47.62	P/S	P/S/L/B/E	P/S/L/B
	10.16	53.57		P/S/L/B/E	P/S/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	11.43	59.53			P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	12.70	65.48				P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	14.15	72.92				P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
244.48 (9-5/8)	7.92	48.07	P/S
	8.94	53.57	P/S	P/S/L/B	P/S/L/B
	10.03	59.53		P/S/L/B/E	P/S/L/B	P/L/B/E	P/L/B/E	P/L/B/E
	11.05	64.73			P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	11.99	69.94			P/L/B	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	13.84	79.62				P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E	P/L/B/E
	15.11	86.91				P/L/B	P/L/B	P/L/B	P/L/B	P/L/B
	15.47	88.40						P
	17.07	96.58						P
	18.64	104.62						P
	20.24	112.50						P
273.05 (10-3/4)	7.09	48.74	P/S
	8.89	60.27	P/S	P/S/B	P/S/B
	10.16	67.71		P/S/B/E	P/S/B
	11.43	75.90		P/S/B/E	P/S/B	P/S/B/E	P/S/B/E	P/S/B/E	P/S/B/E
	12.57	82.59			P/S/B	P/S/B/E	P/S/B/E	P/S/B/E	P/S/B/E
	13.84	90.33						P/S/B/E	P/S/B/E	P/S/B/E
	15.11	97.77						P/S/B	P/S/B	P/S/B
	17.07	108.93						P
	18.64	117.86						P
	20.24	126.94						P
298.45 (11-3/4)	8.46	62.50	P/S
	9.53	69.94		P/S/B	P/S/B
	11.05	80.36		P/S/B	P/S/B
	12.42	89.29		P/S/B	P/S/B	P/S/B	P/S/B	P/S/B	P/S/B	P/S/B
	13.56	96.73				P	P	P	P	P
	14.78	105.66				P	P	P	P	P
339.72 (13-3/8)	8.38	71.43	P/S
	9.65	81.10		P/S/B	P/S/B
	10.92	90.78		P/S/B	P/S/B
	12.19	101.19		P/S/B	P/S/B	P/S/B	P/S/B	P/S/B	P/S/B
	13.06	107.15				P/S/B	P/S/B	P/S/B	P/S/B	P/S/B
406.40 (16)	9.53	96.73	P/S
	11.13	111.61		P/S/B	P/S/B
	12.57	125.01		P/S/B	P/S/B
	16.66	162.21		P		P	P		P	P
473.08 (18-5/8)	11.05	130.21	P/S	P/S/B	P/S/B
508.00 (20)	11.13	139.89	P/S/L	P/S/L/B	P/S/L/B
	12.70	158.49		P/S/L/B	P/S/L/B
	16.13	197.93		P/S/L/B
Note：P- plain end pipe, S- short round thread, L- long round thread, B- buttress thread, E- direct connection type