Dill Collar

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详细介绍

[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[产品参数, 参数]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]

Device parameters

Mechanical properties of drill collars

Outer diameter range		Yield strength R t	Tensile strength R m	Elongation A%	Brinell hardness HB	Charpy impact energy AkvJ
mm	in	MPa	MPa
79.4 — 171.4	3 1/8 — 6 3/4	≥758	≥965	≥13	285 — 341	≥54 or ≥70
177.8 — 279.4	7 — 11	≥689	≥930	≥13	285 — 341	≥54 or ≥70

chemical composition

Grade

Chemical composition %

4145HMOD

0.42 ～

0.49

0.15 ～0.35

1.00 ～1.25

≤ 0.025

1.00 ～1.35

0.30-0.35

≤ 0.25

≤ 0.35

≤ 0.05

0.03 ～0 . 08

Drill collar specifications	OD		ID		Length Length	Chamfer diameter Champher	Reference curved Bending strength Proportion
Drill collar specifications	mm	in	mm	in		mm	Intensity ratio
NC23-31	79.4	3 1/8	31.8	11/4	9150	76.2	2.57:1
NC26-35(2 3/8IF)	88.9	3 1/2	38.1	11/2	9150	82.9	2.42:1
NC31-41(2 7/8IF)	104.8	4 1/8	50.8	2	9150	100.4	2.43:1
NC35-47	120.7	4 3/4	50.8	2	9150	114.7	2.58:1
NC38-50(3 1/2IF)	127.0	5	57.2	2 1/4	9150 or 9450	121.0	2.38:1
NC44-60	152.4	6	57.2	2 1/4	9150 or 9450	144.5	2.49:1
NC44-62	158.8	6 1/4	57.2	2 1/4	9150 or 9450	149.2	2.91:1
NC44-62(4IF)	158.8	6 1/4	71.4	2 13/16	9150 or 9450	150.0	2.63:1
NC46-65(4IF)	165.1	6 1/2	57.2	2 1/4	9150 or 9450	154.8	2.76:1
NC46-65(4IF)	165.1	6 1/2	71.4	2 13/16	9150 or 9450	154.8	3.05:1
NC46-67(4IF)	171.4	6 3/4	57.2	2 1/4	9150 or 9450	159.5	3.18:1
NC50-67(4 1/2IF)	171.4	6 3/4	71.4	2 13/16	9150 or 9450	159.5	2.37:1
NC50-70(4 1/2IF)	177.8	7	57.2	2 1/4	9150 or 9450	164.7	2.54:1
NC50-70(4 1/2IF)	177.8	7	71.4	2 13/16	9150 or 9450	164.7	2.73:1
NC50-72(4 1/2IF)	184.2	7 1/4	71.4	2 13/16	9150 or 9450	169.5	3.12:1
NC50-77	196.8	7 3/4	71.4	2 13/16	9150 or 9450	185.3	2.70:1
NC50-80	203.2	8	71.4	2 13/16	9150 or 9450	190.1	3.02:1
6 5/8REG	209.6	8 1/4	71.4	2 13/16	9150 or 9450	195.7	2.93:1
NC61-90	228.6	9	71.4	2 13/16	9150 or 9450	212.7	3.17:1
7 5/8REG	241.3	9 1/2	76.2	3	9150 or 9450	223.8	2.81:1
NC70-97	247.6	9 3/4	76.2	3	9150 or 9450	232.6	2.57:1
NC70-100	254.0	10	76.2	3	9150 or 9450	237.3	2.81:1
8 5/8REG	279.4	11	76.2	3	9150 or 9450	266.7	2.84:1