API Drill collars

API Drill collars are made according to API standards., We can supply sizes from 3 1/8" to 11", We will make our prompt delevery - details see: https://www.machineto.com/api-drill-collars-10149514

Place of Origin:Shandong China (Mainland)

Machine Type:Drilling Machine

API Drill collars specifications

				m
Design	O	D	ID	Lengh	Chamfer Diameter
	in	mm	+1.6-0.0mm	+152.4mm	+0.4mm	Reference ratio for curvature strength
NC23-31	3 1/8	79.4	31.8	9.15	76.2	2.57:1
NC26-35	3 1/2	88.9	38.1	9.15	82.9	2.42:1
NC31-41	4 1/8	104.8	50.8	9.159.45	100.4	2.43:1
NC35-47	4 3/4	120.7	50.8	9.159.45	114.7	2.58:1
NC38-50	5	127.0	57.2	9.159.45	121.0	2.38:1
NC44-60	6	152.4	57.2	9.159.45	144.5	2.49:1
NC44-60	6	152.4	71.4	9.159.45	144.5	2.84:1
NC44-62	6 1/4	158.8	57.2	9.159.45	149.2	2.91:1
NC44-62	6 1/4	158.5	71.4	9.159.45	150.0	2.63:1
NC46-65	6 1/2	165.1	57.2	9.159.45	154.8	2.76:1
NC46-65	6 1/2	165.1	71.4	9.159.45	154.8	3.05:1
NC46-67	6 3/4	171.5	57.2	9.159.45	159.5	3.18:1
NC50-70	7	177.8	57.2	9.159.45	164.7	2.54:1
NC50-70	7	177.8	71.4	9.159.45	164.7	2.73:1
NC50-72	7 1/4	184.2	71.4	9.159.45	169.5	3.12:1
NC56-77	7 3/4	196.9	71.4	9.159.45	185.3	2.70:1
NC56-80	8	203.2	71.4	9.159.45	190.1	3.02:1
6 5/8REG	8 1/4	209.6	71.4	9.159.45	195.7	2.93:1
NC61-90	9	228.6	71.4	9.159.45	212.7	3.17:1
7 5/8REG	9 1/2	241.3	76.2	9.159.45	223.8	2.81:1
NC70-97	9 3/4	247.7	76.2	9.159.45	232.6	2.57:1
NC70-100	10	254.0	76.2	9.159.45	237.3	2.81:1
8 5/8REGc	11	279.4	76.2	9.159.45	266.7	2.84:1