Non-magnetic Drill Collar

• 
• 
• 
• 
• 

Non-magnetic Drill collars are made from Non-magnetic drill collar materials with low- strength (SWNM20-14) by combining a proprietary chemical analysis and a rotary hammer forging process with low magnetic permeability excellent machine ability. The material is resistant to stress corrosion cracking, with high machine ability and no tendency to galling. Each drill collar is fully inspected by internal inspection dept. Strict to control of chemical composition and special forging process guarantee the excellent mechanical properties of SENWELL’S non-magnetic tools.

Non magnetic Properties:

Relative Permeability: Max1.005

Hot spot/Field Gradient△ B: Max ± 0.05μT

When MPS=1 ×105/4πA/m:

Special Treatment on ID: Roller Burnishing (After roller burnishing, a compressive layer come into being)

Advantage:

3. μm

Inspection& test items for each Non-magnetic drill collar, non-magnetic stabilizer etc.

Chemical composition, Tensile Test, Impact Test, Hardness Test, Metallographic Test (Grain Size), Corrosion Test (according to ASTM A262 Practice E), Ultrasonic Test over the whole length of the bar (according to ASTM A388), Relative Magnetic Permeability Test, Hot Spot Test, Dimension Test etc.

Drill collars are available in lengths from 10 to 31 feet and outside diameter from 3 1/8” to 11".

Other supplier products

	casing and tubing
	Api AISI 4145H forged oilfield drilling spiral integral blade stabilizer/drilling stabilizers	Material:AISI 4145H, AISI 4145H Mod, AISI 4340, AISI 4140-4142 and Non-magnetic. Size:Up to 36” drilling stabilizer All of the connections a...
	Forging	Type of processes: Open Die Forging Die Forging Type of products: All kinds of Metallurgical shaft Hydroelectric generator shaft Wind-driven gene...
	Drill pipe
	casing drift

Same products

	ASTM A351 CF3M Hydraulic Actuated Butterfly Valve	Seller: Topper China Valve Manufacturers Co., Ltd.	Hydraulic Actuated Butterfly Valve Supplier in China: ASTM A351 CF3M Butterfly Valve, Hydraulic A...
	Genuine Caterpillar spare parts	Seller: JEA Mechanical and Electrical Equipment Co.,Ltd.	Caterpillar is the world's leading manufacturer of construction and mining equipment, diesel and ...
	bolt, screw, cylinder liner, nut, anchor, piston, valve,etc.	Seller: Ningbo Trigey Trade Co., Ltd
	Investment Casting Machinery Parts by JYG Casting	Seller: Shandong JYG Precision Casting Co., Ltd	Shandong Jingyanggang Metal Equipment Co., Ltd. (Shandong JYG Precision Casting) has been special...
	Negative 180 Degrees Frozen Curved Screen Mobile Phone LCD Freezer Separator Machine	Seller: SHENZHEN MTRIANGEL TECHNOLOGY Co.,Ltd	Function 1. The newest frozen separation technology,More efficient and safe, not hurt LCD; 2...