Non-magnetic drill collar

Non-magnetic drill collar is made of independently developed low-carbon stainless steel in accordance with API Specifications and SY/T5144 Standards. Threads can be processed with cold rolling. We can process double-shoulder threads and other specifications of special threads.

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Non-magnetic drill collar

● Dimensional specification

Drill collar No. Sel.	OD		ID		mm Length	Df mm	Bendingstrength ration
Drill collar No. Sel.	mm	in	mm	in	mm Length	Df mm	Bendingstrength ration
NC23-31	79.4	31/8	31.8	11/4	9150	76.2	2.57:1
NC26-35	88.9	31/2	38.1	11/2	9150	82.9	2.42:1
NC31-41	104.8	41/8	50.8	2	9150 or 9450	100.4	2.43:1
NC35-47	120.7	43/4	50.8	2	9150 or 9450	114.7	2.58:1
NC38-50	127.0	5	57.2	21/4	9150 or 9450	121.0	2.38:1
NC44-60	152.4	6	57.2	21/4	9150 or 9450	144.5	2.49:1
NC44-60	152.4	6	71.4	213/16	9150 or 9450	144.5	2.84:1
NC44-62	158.8	61/4	57.2	21/4	9150 or 9450	149.2	2.91:1
NC46-62	158.8	61/4	71.4	213/16	9150 or 9450	150.0	2.63:1
NC46-65	165.1	61/2	57.2	21/4	9150 or 9450	154.8	2.76:1
NC46-65	165.1	61/2	71.4	213/16	9150 or 9450	154.8	3.05:1
NC46-67	171.4	63/4	57.2	21/4	9150 or 9450	159.5	3.18:1
NC50-67	171.4	63/4	71.4	213/16	9150 or 9450	159.5	2.37:1
NC50-70	177.8	7	57.2	21/4	9150 or 9450	164.7	2.54:1
NC50-70	177.8	7	71.4	213/16	9150 or 9450	164.7	2.73:1
NC50-72	184.2	71/4	71.4	213/16	9150 or 9450	169.5	3.12:1
NC56-77	196.8	73/4	71.4	213/16	9150 or 9450	185.3	2.70:1
NC56-80	203.2	8	71.4	213/16	9150 or 9450	190.1	3.02:1
65/8REG	208.6	81/4	71.4	213/16	9150 or 9450	195.7	2.93:1
NC61-90	228.6	9	71.4	213/16	9150 or 9450	212.7	3.17:1
75/8REG	241.3	91/2	76.2	3	9150 or 9450	223.8	2.81:1
NC70-97	247.6	93/4	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
85/8REG	279.4	11	76.2	3	9150 or 9450	266.7	2.84:1

● Main tolerance dimensions

OD		OD	ID	Length	DF Bendingstrengthratio
mm	in	OD	ID	Length	DF Bendingstrengthratio
≤88.9	≤31/2	+1.20	+1.60	+152.4	±0.4
>88.9∽114.3	>31/2∽41/2	+1.60
>114.3∽139.7	>41/2∽51/2	+2.00
>139.7∽165.1	>51/2∽61/2	+3.20
>165.1∽215.9	>61/2∽81/2	+4.00
>215.9∽241.3	>81/2∽91/2	+4.80
>241.3	>91/2	+6.40

● Mechanical properties

OD		Yieldstrength		Tensilestrength		Elongation	Shrinkage	Hardnes	Impact Akv
mm	in	Ksi	Mpa	Ksi	Mpa	%	%	HB	J
≤180	≤7	≥120	≥828	≥135	≥931	≥25	≥50	285-360	≥75
>180	>7	≥110	≥759	≥130	≥897	≥25	≥50	285-360	≥75

Magnetic property

(Magnetic field = 1 × 10₅/4π A/m)

1. Relative magnetic permeability μr <1.010

2. Magnetic gradient ΔB ≤0.05 μT

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Telephone: 86-13203935825

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sales@zuolintool.com

Tel: 86-13203935825

Quick access to technical support and detailed quotes

Welcome to fill in the following form, fill in your product requirements, contact information and other information, we will quickly feedback your purchase consultation. You can also contact us through online consultation, email, etc., and our customer service team will further provide you with quality service.

Quick access toTechnical SupportandDetailed Quotations

Welcome to fill in the following form, complete your product requirements, contact information and other information, we will quickly feedback your purchase consultation. You can also contact us through online consultation, e-mail , and our customer service team will further provide you with excellent service.