non -magnetic drillc ollar manufacturer from China Luhai Energy Co.,Ltd

Payment Terms:	T/T,L/C
Place of Origin:	Beijing, China (Mainland)


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Product Detail

Means of Transport: Ocean,Land

Packing: iron shelf

drill collar: non-magnetic drillc ollar

Production Capacity: 1

Brand Name: Derun

DERUN non-magnetic drill collars are made from non-magnetic materials with low-magnetic permeability.
API monogram, serial number, OD, ID, type and

OD		ID		Length mm	Bevel Diameter mm	Connection	Bending Strength Ratio
in	mm	in	mm	Length mm	Bevel Diameter mm	Connection	Bending Strength Ratio
3-1/8	79.4	1-1/4	31.8	9150	76.2	NC23-31	2.57: 1
3-1/2	88.9	1-1/2	38.1	9150	82.9	NC26-35 ( 21/8IF)	2.42 :1
4-1/8	104.8	2	50.8	9150	100.4	NC31-41 ( 27/8IF )	2.43 :1
4-3/4	120.7	2	50.8	9150	114.7	NC35-47	2.58 :1
5	127	2-1/4	57.2	9150	121.0	NC38-50 ( 31/2IF )	2.38:1
6	152.4	2-1/4	57.2	9150 or 9450	144.5	NC44-60	2.49:1

6	152.4	2-13/16	71.4	9150 or9450	144.5	NC44-60	2.84:1
6-1/4	158.8	2-1/4	57.2	9150 or 9450	149.2	NC44-62	2.91:1
6-1/4	158.8	2-13/16	71.4	9150 or 9450	150.0	NC46-62 ( 4IF )	2.63:1
6-1/2	165.1	2-1/4	57.2	9150 or 9450	154.8	NC46-65 ( 4IF)	2.76:1
6-1/2	165.1	2-13/16	71.4	9150 or 9450	154.8	NC46-65 ( 4IF )	3.05:1
6-3/4	171.4	2-1/4	57.2	9150 or 9450	159.5	NC46-67 ( 4IF )	3.18:1
6-3/4	171.4	2-13/16	71.4	9150 or 9450	159.5	NC50-67( 41/2IF )	2.37:1
7	177.8	2-1/4	57.2	9150 or 9450	164.7	NC50-70 ( 41/2IF )	2.54 :1
7	177.8	2-13/16	71.4	9150 or 9450	164.7	NC50-70( 41/2IF )	2.73 :1
7-1/4	184.2	2-13/16	71.4	9150 or 9450	169.5	NC50-72 ( 41/2IF )	3.12 :1
7-3/4	196.8	2-13/16	71.4	9150 or 9450	185.3	NC56-77	2.70 :1
8	203.2	2-13/16	71.4	9150 or 9450	190.1	NC56-80	3.02 :1

8-1/4	209.6	2-13/16	71.4	9150 or 9450	195.7	65/8REG	2.93: 1
9	228.6	2-13/16	71.4	9150 or 9450	212.7	NC61-90	3.17 :1
9-1/2	241.3	3	76.2	9150 or 9450	223.8	75/8REG	2.81 :1
9-3/4	247.6	3	76.2	9150 or 9450	232.6	NC70-97	2.57 :1

10	254	3	76.2	9150 or 9450	237.3	NC70-100	2.81: 1
11	279.4	3	76.2	9150 or 9450	266.7	85/8REG	2.84 :1

Mechanical Properties of Non-magnetic Drill Collar

Drill Collar O.D. Range		Yield Strength Mpa	Tensile Strength Mpa	Elongation(min) with Gage Length 4 times Diameter	Brinnel Hardness (Min)	Min. Charpy Impact Value Ft. lb.
mm	in	Yield Strength Mpa	Tensile Strength Mpa	Elongation(min) with Gage Length 4 times Diameter	Brinnel Hardness (Min)	Min. Charpy Impact Value Ft. lb.

79.4~171.4	3 1/8" ~6 3/4"	≥758	≥827	≥18	285	40
177.4~279.4	7"~ 11"	≥689	≥758	≥20	277	40

Magnetic Properties of Non-magnetic Drill Collar:
When MPS=1 ×105/4πA/m:
Relative magnetic permeability μ r ≤ 1.1010
Magnetic Field Gradient △ B ≤ 0.05 μT