API Spec 7-1 Oil Drilling Non-Magnetic Drill Collar O. D. 203.2mm-Nc56

Price Negotiable

Price: USD100

MOQ: 1 PC

Delivery Time: 5 working days

Brand: SHITAN

Product Description

Non-Magnetic Drill Collar are made of low magnetic stainless alloy steel by combining a proprietary chemical analysis and a hammer forging process. The material is resistant to stress corrosion cracking. With high mechanical properties, low magnetic permeability, excellent machineability and no tendency to galling. Production standard: API Spec 7-1 and API Spec 7-2.
The parameter of Non-Magnetic Drill Collar according to API Spec 7-1 specifications.

Drill Collar Thread	Outside Diameter D		Inside Diameter d		Length	Chamfer Diameter	Reference Bending Strength Ratio
	Outside Diameter D		Inside Diameter d		L	Df
	mm	in	mm	in	mm	mm
NC31-41(27/8IF)	104.8	4 1/8	50.8	2	9140or9450	100.4	2.43:1
NC35-47	120.7	4 3/4	50.8	2	9140or9450	114.7	2.58:1
NC38-50(31/2IF)	127	5	57.2	2 1/4	9140or9450	121	2.38:1
NC44-60	152.4	6	57.2	2 1/4	9140or9450	144.5	2.49:1
NC44-60	152.4	6	71.4	2 13/16	9140or9450	144.5	2.84:1
NC44-62	158.8	6 1/4	57.2	2 1/4	9140or9450	149.2	2.91:1
NC46-62(4IF)	158.8	6 1/4	71.4	2 13/16	9140or9450	150	2.63:1
NC46-65(4IF)	165.1	6 2/4	57.2	2 1/4	9140or9450	154.8	2.76:1
NC46-65(4IF)	165.1	6 2/4	71.4	2 13/16	9140or9450	154.8	3.05:1
NC46-67(4IF)	171.4	6 3/4	57.2	2 1/4	9140or9450	159.5	3.18:1
NC50-67(41/2IF)	171.4	6 3/4	71.4	2 13/16	9140or9450	159.5	2.37:1
NC50-70(41/2IF)	177.8	7	57.2	2 1/4	9140or9450	164.7	2.54:1
NC50-70(41/2IF)	177.8	7	71.4	2 13/16	9140or9450	164.7	2.73:1
NC50-72(41/2IF)	184.2	7 1/4	71.4	2 13/16	9140or9450	169.5	3.12:1
NC56-77	196.8	7 3/4	71.4	2 13/16	9140or9450	185.3	2.70:1
NC56-80	203.2	8	71.4	2 13/16	9140or9450	190.1	3.02:1
6 5/8REG	209.6	8 1/4	71.4	2 13/16	9140or9450	195.7	2.93:1
NC61-90	228.6	9	71.4	2 13/16	9140or9450	212.7	3.17:1