Project Description
P750HS 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
P750HS 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 uMAX. 6” | 175 ksi | 1208 N/mm2 |
| Tensile Strength (min.)： | 180 ksi | 1242 N/mm2 |
| Elongation (min.)： | 10% | 10% |
| Reduction of area (min.)： | 50% | 50% |
| Impact energy (min.)： | 80 ft.lb | 110 J |
| Endurance Strength / N=105(min.)： | +/- 80 ksi | +/- 550 N/mm2 |
| Hardness Brinell： | 300-420 HB | 300-420 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.
P750HS 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.
We are committed to integrate steel resources in china and serve the global steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise before. In the aspect of resources and information, we have established cooperative relationship with nearly hundred enterprises, either state-owned or private owned in China.
What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want. We provide preffesional one-stop service to the Contractors of follows project:
- Oil and Gas Pipeline Construction
- Onshore and Offshore
- Boiler Manufacturers
- Oil Refining Equipment
- Petroleum and Chemical Plant Construction
- Fire Protection
- Heating & Air Conditioning
Our ability to purchase materials directly from leading mills at the best possible price will give you the competitive edge. This coupled with a skilled workforce dedicated to embracing the demands of the markets we serve. Just give us a call +86-731-89903933.
