Cangzhou Steel Pipe Group (CSPG) Co., Ltd.

• Product Description

Standard: API Standard2: API 5CT Grade Group: API J55-API P110 Grade: API J55, API K55, API N80, API L80, API P110 Thickness: 4.24-20.62mm Section Shape: Round Outer Diameter (Round): 63.32-630mm Place of Origin: Hebei, China Application: Oil Pipe

• Product Details

API 5CT grade N80 steel casing tube has the same parameters as the N80 tubing. However, the thread of our product can be divided into buttress type, long round type, short round type, VAM type and others.

• Brief Introduction

N80 Oil Casing Seamless Steel Pipe

Size	linear mass lb/ft	Outside diameter		Wall thickness
		in	mm	in	mm
4 1/2"	9.50	4.500	114.30	0.205	5.21
	10.50	4.500	114.30	0.224	5.69
	11.60	4.500	114.30	0.250	6.35
	13.50	4.500	114.30	0.290	7.37
	15.10	4.500	114.30	0.337	8.56
5"	11.50	5.000	127.00	0.220	5.59
	13.00	5.000	127.00	0.253	7.52
	15.00	5.000	127.00	0.296	9.19
	18.00	5.000	127.00	0.362	9.19
	21.40	5.000	127.00	0.437	11.10
	23.20	5.000	127.00	0.478	12.14
	24.10	5.000	127.00	0.500	12.70
5 1/2""	14.00	5.500	139.70	0.244	6.20
	15.50	5.500	139.70	0.275	6.98
	17.00	5.500	139.70	0.304	7.72
	20.00	5.500	139.70	0.361	9.17
	23.00	5.500	139.70	0.415	10.54
	26.80	5.500	139.70	0.500	12.70
	29.70	5.500	139.70	0.562	14.27
	32.60	5.500	139.70	0.625	15.88
	35.30	5.500	139.70	0.687	17.45
	38.00	5.500	139.70	0.687	17.45
	40.50	5.500	139.70	0.812	20.62
	43.10	5.500	139.70	0.875	22.22
6 5/8"	20.00	6.625	168.28	0.288	7.32
	24.00	6.625	168.28	0.352	8.94
	28.00	6.625	168.28	0.417	10.59
	32.00	6.625	168.28	0.475	12.06
7"	20.00	7.000	177.80	0.272	6.91
	23.00	7.000	177.80	0.317	8.05
	26.00	7.000	177.80	0.362	9.19
	29.00	7.000	177.80	0.408	0.408
	32.00	7.000	177.80	0.453	11.51
	35.00	7.000	177.80	0.498	12.65
	38.00	7.000	177.80	0.540	13.72
7 5/8"	26.40	7.625	193.68	0.328	8.33
	29.70	7.625	193.68	0.375	9.52
	33.70	7.625	193.68	0.430	10.92
	39.00	7.625	193.68	0.500	12.70
	42.80	7.625	193.68	0.562	14.27
	45.30	7.625	193.68	0.595	15.11
	47.10	7.625	193.68	0.625	15.88
8 5/8"	24.00	8.625	219.08	0.264	6.71
	28.00	8.625	219.08	0.304	7.72
	32.00	8.625	219.08	0.352	8.94
	36.00	8.625	219.08	0.400	10.16
	40.00	8.625	219.08	0.450	11.43
	44.00	8.625	219.08	0.500	12.70
	49.00	8.625	219.08	0.557	14.15
9 5/8"	32.30	9.625	244.48	0.312	7.92
	36.00	9.625	244.48	0.352	8.94
	40.00	9.625	244.48	0.395	10.03
	43.50	9.625	244.48	0.435	11.05
	47.00	9.625	244.48	0.472	11.99
	53.50	9.625	244.48	0.545	13.84
	58.40	9.625	244.48	0.595	15.11
	59.40	9.625	244.48	0.609	15.47
	64.90	9.625	244.48	0.672	17.07
	70.30	9.625	244.48	0.734	18.64
	75.60	9.625	244.48	0.797	20.24
10 3/4"	32.75	10.750	273.05	0.279	7.09
	40.50	10.750	273.05	0.350	8.89
	45.50	10.750	273.05	0.400	10.16
	40.50	10.750	273.05	0.350	8.89
	51.00	10.750	273.05	0.450	11.43
	55.50	10.750	273.05	0.495	12.57
	60.70	10.750	273.05	0.545	13.34
	65.70	10.750	273.05	0.595	15.11
	73.20	10.750	273.05	0.734	18.64
	85.30	10.750	273.05	0.797	20.24
11 3/4”	42.00	11.750	298.45	0.333	8.46
	47.00	11.750	298.45	0.375	9.53
	54.00	11.750	298.45	0.435	11.05
	60.00	11.750	298.45	0.489	12.42
	65.00	11.750	298.45	0.534	13.56
	71.00	11.750	298.45	0.582	14.78
13 3/8”	48.00	13.375	339.72	0.330	8.38
	54.50	13.375	339.72	0.380	9.65
	61.00	13.375	339.72	0.430	10.92
	68.00	13.375	339.72	0.480	12.19
	72.00	13.375	339.72	0.514	13.06

Specifications

Material	N80, steel grade
Outer Diameter	4 1/2"-20", (114.3-508mm)
Wall Thickness	5.12-16.13mm
Form of Thread	Buttress thread casing, Long round thread casing, Short round thread casing
Function	Protects tubing pipe

Contrast

Steel Grade	Classification	Pipe Body Mark	Color of Coupling
N80	1	One red	Entire Coupling	Color Band
N80	Q	One red, one bright green	Red	None
			Red	Green

N80 oil casing

N80 oil casing is an important equipment for oil drilling, the main equipment also includes drill pipe, core pipe and casing, drill collar and small diameter drilling pipe and so on. Domestic casing is made of geological drilling steel through hot rolling or cold drawing, steel number with "geological" (DZ), commonly used casing steel grade has DZ40, DZ55, DZ753. It is mainly used to support the well wall during drilling and after completion to ensure the drilling process and the normal operation of the whole well after completion.

An overview

(1) major oil casing importers are: Germany, Japan, Romania, Czech republic, Italy, the United Kingdom, Austria, Switzerland, the United States, Argentina, Singapore also have imports.

(2)API specifies three lengths: r-1 is 4.88-7.62m, r-2 is 7.62-10.36m, and r-3 is 10.36m-longer.

(3) some imported goods are marked with LTC, i.e., filament bushing.

(4) besides API standard, a small part of casing imported from Japan is in compliance with Japanese factory standard.

(5) in the case of claim, there have been appearance defects such as black buckle, thread damage, pipe body folding, broken buckle and thread tight pitch deviation, coupling J value deviation and internal quality problems such as casing embrittlement and low yield strength.

use

It is mainly used to support the well wall during drilling and after completion to ensure the drilling process and the normal operation of the whole well after completion.

species

Type and packing of oil casing: SY/ t6194-96 "oil casing" includes short thread casing and coupling and long thread casing and coupling. According to SY/ t6194-96, the homemade casing should be tied with steel wire or steel belt. The exposed thread of each sleeve and collar shall be protected by a guard ring.