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Artificial Lift Techbook 2019

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HartEnergy.com | April 2019 | 33 ARTIFICIAL LIFT: TECHNOLOGY "Operators have a lot riding on their ability to use electricity to power their equipment. Because it's a lot less expensive to run on electricity than die- sel, for example, ensuring adequate power supply to these wells is key to supporting their production and improving operating margins," he added. The industry has provided technology that's effec- tive in riding through nanosecond brownouts for certain applications. However, there are times when a dip in voltage extends beyond the capabilities of technology currently deployed. What service providers like Valiant are working toward is achieving a three- to five-second ride through. "To make sure our customers with drives on a wellsite aren't at risk of having their operations stalled, Valiant is in the process of testing different technolo- gies with customers who are looking to partner with these solutions," Martensen said. "One option we're looking at is a technology designed to supply stored power during a brief voltage drop. Like an oversized battery pack, this technology could kick in during a brownout to allow the drive to ride through a drop in voltage without shutting down the ESP. Our No. 1 priority is to help our customers overcome these types of production hurdles as safely and effectively as possible," he noted. "What really ties these solutions together is our ability to monitor our customers' downhole equipment and analyze historical data on each well in the field through Valiant's tracking database," Martensen explained. Collecting this information company-wide allows Valiant to draw trend analysis and determine the best preemptive and corrective actions to optimize well performance and avoid shutdowns. "This could mean programming the drive to operate under transient conditions or resizing the ESP to adapt to changes in production over time. By combining the field experience and insights of our people with these digital tools, we are able to offer solutions that address operators' problems before they occur," he said. Permanent magnet motors Borets introduced its first permanent magnet motor in 2006. PMMs for ESPs predominantly have been used in the Russian market. Borets has shipped, sold or installed over 12,000 PMMs for ESPs globally. Currently there are over 4,000 PMMs in operation in Russia and roughly 75 operating in the Permian Basin," said Borets' Simmons. "This proven technol- ogy is finally gaining a foothold in U.S. markets." One of the key constituent parts of the PMM is the internal rotor section. It doesn't need any induced cur- rent to create a magnetic field. That field comes from the permanent magnets. "In contrast to an induction motor, there is no current induced in the rotor. That in itself is where the prime electrical efficiency comes from because you don't have copper bars that suffer from electrical losses, and you don't generate the same amount of heat," he explained. "You instantly achieve about a 10% power efficiency." Valiant Pulse Variable Speed Drives utilize the electrical grid to power multiple ESPs on a wellsite in the Permian. (Photo courtesy of Valiant Artificial Lift Solutions)

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