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Artificial Lift Techbook 2016

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ARTIFICIAL LIFT TECHBOOK: TECHNOLOGY EPmag.com | May 2016 | 25 Liberty Lift Solutions introduced its XL model long -stroke rod pumping unit in early 2016. The product incorporates numerous features designed to promote extended life, operational advantages, energy effciency and minimal maintenance. The XL unit has a size designation of 320-500- 306 and operates at slow speeds with constant velocity, providing fewer strokes per minute with high production rates, according to the company. "The thought process in rod pumping has always been long, slow strokes; the longer the stroke, the slower you can go. The XL model has a 306-in. stroke, with a top end speed on this unit at about 4.3 strokes per minute," said Don Crow, vice president of sales for the company. "This allows horizontal wells to pump at slower speeds, typically resulting in less rod wear and more fuid produced with the longer stroke." The pumping unit incorporates an effcient, clean oiling system for internal parts, according to the company. The unit was designed with easy access in mind for maintenance as the system incor- porates safety features to protect operating person- nel and the environment. For example, the unit's integrated rollback system allows easy movement and repositioning for safer workover operations. Well intervention is another area where signif- cant advances have been made. "Though it may be claimed that surveillance and optimization have improved over the years, the only real step change in the last decade is the introduction of alternatively deployed "rigless" ESP systems," said Schlumberger's Griffths. "The ZEiTECS Shuttle rigless ESP replacement sys- tem from Schlumberger, for example, allows ESPs to be replaced on wireline, coiled tubing or rods without a rig. This minimizes production deferment, operating cost and disruption to operations while signifcantly reducing HSE exposure and risk. The alternatively deployed ESP technologies mitigate risk and improve the customer value proposition of standard ESPs." So what could the artifcial lift technologies look like in the future? "I think we'll see some hybrid solutions," said Ron Holsey, digital commercial leader for GE Oil and Gas Surface business. "For example, one of the weak points of a pumping unit today is actually just the physical rod. If you can still do a recipro- cating pump downhole that is rodless, I think that is something you may see sooner rather than later. It is a real possibility because you eliminate the one major point of failure within that system. "You'll see some evolution to systems that can handle the in-between. When we punch a hole in the ground—once we get the initial production—we ride that initial decline curve, then we start making deci- sions on how to artifcially lift it. You talk to the ESP guys, and they can do down to 20 barrels a day, but it's not very effcient. I think what you will see that technology will start to fll those gray areas a little bit more—rod pump systems able to bleed more into where the initial ESP business is and you'll see ESPs bleed into where the rod pump is today." The need for automation will continue to increase as the demand for more data to better opti- mize production increases. "In addition to how much fuid we move, proba- bly more important, is how we can help customers manage their production in the feld. It is going to be at the enterprise-wide level and at the feld-wide level optimization and we also will see tighter inte- gration between what's in the reservoir and what's in the production system," Holsey said. "Those two areas are pretty much walled off today for what, I would say, are not very good reasons other than that's just the way it's always been. The advent of being able to take real time-data and do real-time production optimization based off the reservoir data is where we will be going to in the future." n The ZEiTECS Shuttle allows standard ESP interventions without a rig. (Image courtesy of Schlumberger)

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