Tianjin Bohai Metal Corporation

API 5CT Seamless steel casing and tubing

API 5CT seamless oil casing pipe for drilling pipeline is a large diameter pipe that serves as the tructural retainer,it can protect both subsurface and well bore from collapsing and to allow drilling fluid to circulate and extraction.

Steel Pipe

Seamless Steel Pipe

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Commodity name: API 5CT Seamless steel casing and tubing

Product introduction

Casing Pipe is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or well bore. 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. Steel Casing Pipes have smooth wall & minimum yield strength of 35,000 psi.

API 5CT standard oil casing plays an important role in preventing oil well from being damaged by shallow oil layer and supporting the transportation of oil and gas. What’s more, casing pipe can support the weight of the wellhead layer to prevent collapse. API 5CT casing pipe ensure the smooth progress of the whole drilling process, after that, transport oil and gas from drilling to ground.

Material:J55,K55,L80,N80,P110

Size: 2-1/2″ ,4 1/2″,5 1/2″,6 5/8″,7″ ,9 5/8″ to 20″ / OD 60mm to 508 mm

Wall thickness: 4-16mm

Length: R1(4.88m-7.62m)/R2(7.62m-10.36m)/R3(10.36m-14.63)

coupling: BTC (Buttress Thread Coupling)
STC (Stub(Short) Thread Connector),
LTC (Long Thread Connector)

NUE/EUE/VAM or no thread

Standard: API spec 5CT/ ISO11960

Certificates:API5L, ISO 9001:2008,SGS, BV,CCIC

Surface Treatment:External surface coating (black painted), mark as api 5ct stanard,varnish, oil

Dimension Tolerance:

Types of steel tubes	Outer Diameter		Wall Thickness
Cold-rolled tubes	Tube sizes(mm)	Tolerances(mm)	Tolerances(mm)
	＜114.3	±0.79	－12.5％
	≥114.3	－0.5％，＋1％	－12.5％

Technical data

Chemical composition (Max%)

Grade	Mfg.Process	Technique	C	Si	Mn	P	S	Ni	Cr	Mo	Others
J55	SMLS	Hot rolled/Cold drawn	-	-	-	0.030	0.030	-	-	-	-
N80			-	-	-	0.030	0.030	-	-	-	-
K55			-	-	-	0.030	0.030	-	-	-	-
L80			0.43	0.45	1.90	0.030	0.030	0.25	-	-	Cu 0.25
P-110			-	-	-	0.030	0.030	-	-	-	-
C90			0.35	-	1.00	0.20	0.010	0.99	1.20	0.75	-
C95			0.45	0.45	1.90	0.030	0.030	-	-	-	-
T95			0.35	-	1.20	0.20	0.010	0.99	0.40~1.50	0.25~0.85	-

Mechanical Properties：

Standard codes	Models of steel tubes	Tensite strength（MPa）	Yield strength（MPa）	Elongation（％）	Hardness
API SPEC 5CT	J55	≥517	379～552	check the table
	K55	≥517	≥655
	N80	≥689	552～758
	L80(13Cr)	≥655	552～655		≤241HB
	P110	≥862	758～965