Oil Casing Coupling

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Description

Product Name	Oil Casing Coupling
Executive Standard	API SPEC 5CT, API SPEC 5B, ISO 11960:2004
Raw Material	H40, J55, K55, M65, N80-1, N80Q, L80, C95, T95, P110
Specification	Outer Diameter: 127~365.12mm (4 1/2"~13 3/8")
Type	Short Tread Coupling, Long Tread Coupling, Buttress Thread Coupling (STC, LC, BC)

Parameters of API Round Thread Coupling

Steel Group	Pipe Diameter	Coupling Diameter	Mini. Length (mm)		Diameter of Bore Hole	Bearing Surface Width	Weight (kg)
	D mm	W mm	Short Coupling N L	Long Coupling N L	Q b mm	b mm	Weight (kg)
	D mm	W mm	Short Coupling N L	Long Coupling N L	Q b mm	b mm	Short Coupling	Long Coupling
1	2	3	4	5	6	7	8	9
4-1/2 5 5-1/2 6-5/8 7 7-5/8 8-5/8 9-5/8 10-3/4 11-3/4 13-3/8	114.30 127.00 139.70 168.28 177.80 193.70 219.08 244.48 273.05 298.45 339.72	127.00 141.30 153.67 187.71 200.03 215.90 244.48 269.88 298.45 323.85 365.12	158.75 165.10 171.45 184.15 184.15 190.50 196.85 196.85 203.20 203.20 203.20	177.80 196.85 203.20 222.25 228.60 234.95 254.00 266.70 - - -	116.68 129.38 142.08 170.66 180.18 197.64 223.04 248.44 277.02 302.42 343.69	3.97 4.76 3.18 6.35 4.76 5.56 6.35 6.35 6.35 6.35 5.56	3.62 4.66 5.23 9.12 8.39 12.30 16.23 18.03 20.78 22.64 25.66	4.15 5.75 6.42 11.34 10.83 15.63 21.67 25.45 - - -
a. The coupling has the same specification as the correspondent pipe does. b. For steel group1, 2, 3, the outer diameter is of ± 3.18mm, and the tolerance is within±1%. c. For steel group 4, the outer diameter tolerance is within ± 1%, but the outer diameter is no more than 3.18 –1.59mm. d. For all the steel groups, the tolerance of the bore hole diameter is 0.790mm.

Parameters of API Buttress Thread Coupling

Steel Group	Pipe Diameter	Coupling Diameter		Mini. Length	Diameter of Bore Hole	Bearing Surface Width	Weight (kg)
	D mm	Standard Type	Special Type	Mini. Length	Diameter of Bore Hole	Bearing Surface Width	Weight (kg)
	D mm	W b,c mm	W C mm	N L mm	Q mm	b mm	Standard Type	Special Type
1	2	3	4	5	6	7	8	9
4-1/2 5 5-1/2 6-5/8 7 7-5/8 8-5/8 9-5/8 10-3/4 11-3/4 13-3/8	114.30 127.00 139.70 168.28 177.80 193.68 219.08 244.48 273.05 298.45 339.72	127.00 141.30 153.67 187.71 200.03 215.90 244.48 269.88 298.45 323.85 365.12	123.82 136.52 149.22 177.80 187.32 206.38 231.78 257.18 285.75 - -	225.42 231.78 234.95 244.48 254.00 263.52 269.88 269.88 269.88 269.88 269.88	117.86 130.56 143.26 171.83 181.36 197.23 222.63 248.03 276.61 302.01 343.28	3.18 3.97 3.97 6.35 5.56 7.94 9.52 9.52 9.52 9.52 9.52	4.55 5.85 6.36 11.01 10.54 15.82 20.86 23.16 25.74 28.03 31.77	3.48 4.00 4.47 5.65 6.28 9.29 10.80 12.02 13.39 - -
a. The coupling has the same specification as the correspondent pipe does. b. For steel group1, 2, 3, the outer diameter is of ± 3.18mm, and the tolerance is within±1%. c. For steel group 4, the outer diameter tolerance is within ± 1%, but the outer diameter is no more than 3.18 –1.59mm. d. For the steel group 1, 2, 3, the tolerance of the bore hole diameter is 0.79 –0.40mm.

Production Process Flowchart

Related Names
Casing Pipe Coupler Manufacturer | Oil Well Connection Unit | Device for Oil Drilling

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