P750 Non Magnetic Drill Collar

• Customization: Available
• Warranty: Technical/Sample/Quality
• Manufacturing Process: Forging
• Model NO.: P750
• Operation Pressure: Atmospheric Pressure
• Material: Alloy
• Transport Package: Standard
• Specification: 3 1/8" - 11"
• Trademark: SHUNFU
• Origin: China
• HS Code: 8431431000
• Production Capacity: 100000 Tons Per Year

Product Description

P750 Non Magnetic Drill Collar

One of the main strengths of ShunFu is the ability to be a single source manufacturer of special Non Magnetic collars. Only those products which successfully pass our rigorous inspection controls are allowed to leave our factory. From the sourcing of materials to the final quality control all ShunFu manufactured products pass through our precision machining production steps including BTA boring, CNC lathe and milling, roller burnishing, shot peening, long distance gunhole-drilling and laser cladding at a 6-axis machine.

The reputation of ShunFu in the manufacture and supply of Non Magnetic drill string components is based upon extensive in-house experience both in metallurgy and precision manufacturing. ShunFu has always been the leader in the development of Non Magnetic materials, special manufacturing processes and testing procedures such as hammer peening and hot-spot testing.

Being specifically focused on the manufacturing of nonmagnetic drill string components makes ShunFu a leader in complex precision machining and service at the highest of standards.
 

Drill Collars are made from

high purity austenitic stainless steel.
Low & High Yield Material available
Advanced chemical composition control system and special forging process guarantee the excellent mechanical properties, corrosion
resistant performance and high fatigue resistance of our Non- Magnetic material.
Shoot Peening on Connections.
 

Chemical Composition

P750 is a high pitting corrosion resistant nonmagnetic, austenitic Cr-Ni-N-steel, specifically developed for oilfield applications.

Element	P750
Carbon	max. 0.03
Manganese	1.50-3.00
Chromium	26.50-29.50
Molyddenum	2.00-4.00
Nitrogen	min. 0.20
Nickel	28.00-31.50

 

Mechanical Properties

Following mechanical properties (tested at room temperature) are achieved by a special cold-working process over the full length of the collar:

Yield Strength (min.): OD up to 9 1/4"	140 ksi	965 N/mm^2
0,2%-offset method    OD 9 1/2" and larger	130 ksi	900 N/mm^2
Tensile Strength   (min.):	150 ksi	1035 N/mm^2
Elongation        (min.):	15%	15%
Reduction of area  (min.):	50%	50%
Impact energy     (min.):	100 ft.lb	135 J
Endurance Strength / N=10^5(min.):	+/- 80 ksi	+/- 550 N/mm^2
Hardness Brinell:	300-400 HB	300-400 HB

 

Magnetic Properties

Relative permeability: < 1,001
 

Corrosion Resistance

Transgranular SCC: Prevented by special surface treatments (Hammer peening, roller burnishing, shot peening).

Intergranular SCC: The occurrence of material sensitization is prevented by quenching after warm-forging. Each collar is tested acc. to ASTM A 262, Pract. A and E, last edition.

Pitting Corrosion: Due to high chromium- , nickel- and nitrogen contents an excellent resistance to pitting corrosion comparable to nickelbase alloys is given.
 

Non-Destructive testing

Magnetic inspection: Drill collars are 100% tested by a proprietary probe-testing process using a Forster Magnetomat 1.782. ("Hot Spot"-test). Magnetic permeability of each collar is certified with the printout of probe-testing.

Ultrasonic inspection: Each collar is ultrasonically inspected over 100% of the volume according to ASTM E 114, last edition as a minimum level.

P750 Non-Mag Drill Collars meet all requirements of API Spec. 7.1, last edition. All tests are carried out according to ASTM-Standards, last editions.
 

Our Services

Being specifically focused on the manufacturing of nonmagnetic drill string components makes ShunFu a leader in complex precision machining and service at the highest of standards.

Technical Assistance
Technical assistance in the manufacturability and design of complex collars machined.

Warehousing
Stocking and sales of standard high strength API Spec 7 nonmagnetic drill collars.

Custom Cutting
Stocking and sales of solid P530, P550, P580 and P750 NM material cut to length at customer request.
 

Quality Assurance System

All ShunFu products are manufactured under the full control of a Quality Assurance System which is continually audited and complies with ISO 9001. ShunFu has a state-of-the-art laboratory in which all the testing of materials is carried out. ShunFu has extensive additional facilities that guarantee that products are of the highest quality.