Oil & Gas

Our Oil & Gas industry application expertise include:

• Oilfield Service
• Pipeline Service
• Process Pumping & Material Storage
• Fluid Measurement and Metering

Oilfield Service

We deliver a wide array of magnetic solutions for the harsh environments encountered in the oilfield service industry, both on and offshore, from shallow wells to geothermal depths. Our design engineers are seasoned veterans in designing both permanent magnet and electromagnet components and systems that are ready to tackle your toughest jobs. Our standard design criteria for encased magnetic assemblies for down hole application is 185 °C and 20,000 psi. Our services include full magnetic circuit design, hermetic encasement, vacuum potting for the elimination of trapped air, TIG and laser welding, and magnetic field mapping of the final assembly. We routinely fabricate assembly encasements using high strength alloys such as Titanium, Inconel, Incoloy, Hastelloy and stainless steel.

Applications:

• Nuclear Magnetic Resonance Assemblies
• Magnetic Couplings & Positioners
• CCL Magnets and Assemblies
• Decentralizers
• Bypass Valve Actuators
• Synchronous and Non-Synchronous Actuators
• Fishing Tools
• Seismic Transducer Assemblies
• Alternator Couplings
• Geophone Magnets
• Non-Destructive, Explosion Proof Coil Tubing Inspection
• Tramp Metal Collectors

Pipeline Service

Magnet assemblies that we have designed and manufactured are in operation worldwide on pipeline cleaning pigs, caliper pigs and non-destructive pipeline inspection pigs utilizing the magnetic flux leakage (MFL) principle. The relatively low operating temperatures of pipeline pigging allow greater flexibility in the selection of magnet materials. Our typical inspection designs use Neodymium Iron Boron (Nd-Fe-B). Nd-Fe-B magnets are the strongest commercially available magnetic materials, both magnetically and structurally. They are also extremely resistant to demagnetization. For cleaning pigs, depending on their type and size, the application may call for any one of a variety of magnet materials, including Flexible Ferrite, Hard Ferrite or Nd-Fe-B.

We offer both the standard re-usable alnico horseshoe type magnet pipeline markers as well as our own lower cost marker assembly. You have told us that it is not always convenient or cost effective, and that it is sometimes unsafe to spend the additional time and manpower retrieving pipeline marker magnets. As a result, our engineers have developed a lower cost marker assembly. The threaded holes in the top of our marker assembly provide you the option of mounting other components or accessories, and the lower cost of the Dexter Marker Assembly makes it more cost effective to use it and leave it.

Applications:

• Non-Destructive Pipeline Inspection Pig Magnetizers
• Permanent Magnet Magnetizer Assemblies
• Electromagnet Magnetizers
• EMAT Source Magnets
• Sensor Bias Magnet Assemblies
• Odometer Assembly Magnets & Assemblies
• Cleaning Pig Tramp Metal Collection Assemblies
• Pipeline Marker Magnets

Process Pumping & Material Storage

One of the primary applications for magnets in the process pumping industry is magnetic couplings for sealless pumps. Magnetic couplings eliminate the need for mechanical seals. With their inherent low maintenance, magnetic couplings quickly repay the initial installation cost through lower maintenance down time. We have been designing and manufacturing both standard and custom magnetic couplings for over thirty years, giving us the experience and empirical knowledge to solve all your coupling needs.  We are also well versed in the design and application of plate and tank scanners and crawlers used for non-destructive inspection of material storage tank walls and floors.

Applications:

• Magnetic Couplings from fractional Inch/Ounces of Torque to Hundreds of Foot/Pounds
• Synchronous Couplings
• Coaxial Couplings
• Face-To-Face Couplings
• Metallic and Non-Metallic Containment Barriers
• Non-Synchronous Couplings
• Eddy Current Couplings
• Hysteresis Couplings
• Magnetic Seal Assemblies for Ferrofluid Seals
• Non-Destructive Testing of Storage Tank Floors and Walls
• Source Magnetizer Assemblies For Plate Steel
• Magnetic Wheels For Tank Crawlers

Fluid Measurement and Metering

Our fluid measurement designs are in applications from the refineries, tank farms and terminals of Texas, to silicon wafer processing factories in the Far East. We can design the magnetic coupling components for your positive displacement flowmeter, sight level gauge or mass flowmeter. Our custom manufactured designs can be coated, plated or completely encapsulated to ensure the longest product life possible for your harshest metering environment.

Applications:

• Coriolis Mass Flowmeters
• Driver Magnet & Coil Assemblies
• Sensor Magnet & Coil Assemblies
• Magnetic Couplings for Positive Displacement Flowmeters
• Face-To-Face Couplings
• Coaxial Couplings
• Sight Level Gages for Storage Tanks
• Float Assemblies
• External Sight Gage and Flag Type Magnets

For more information, call us at 888-556-5023 or e-mail us at info@dextermag.com.