Artificial Lift Techbook 2019

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Page 4 of 59 | April 2019 | 3 ARTIFICIAL LIFT: OVERVIEW challenges which may be faced in typical unconven- tional applications. If you look at the shale market, a common issue with shale is rapid decline of the wells, so we need a system that can cope with going from about 3,000 barrels per day to 300 barrels per day in six months, without needing to change out the system. That was one of the first things we did in our portfolio, what we call our FLEXpump series of ESPs, which is a pump that can operate at high efficiency in that wide of a range, which the industry had not seen before then." ESP reliability is an issue the industry has been des- perate to address. These pumps can take a monumental beating downhole and, depending on several factors including the subsurface architecture, can run without fail for several years—or for just a matter of weeks. ESPs are powered equipment with moving parts, and ulti- mately, as with any system that depends on more than one component to perform, the lower reliability can be. "Everything is application dependent," William- Eguegu explained. "Having said that, the way we manage our products, we break down the components of an ESP—pump, motor, cable, motor lead extension. Then we drill down into these components to figure out what we can do better with each of them. I would say that we're breaking that jinx. It doesn't mean that we don't have situations where it's the wrong application or the wrong operating method, which may cause early failures of the systems, but generally we are seeing lots of longevity and need to pull the system only when the reservoir completely changes or it is a full-field workover. Every aspect of our new product development or modifications passes through strong reliability criteria. In the context of what we are dealing with we are seeing improvement." Rapid decline is just one issue lift systems must attempt to counteract. Additional issues include deal- ing with impurities like gas and solids coming in the well due to the makeup and sheer amount of frac sand that is used in shale development. "One of the challenges our customers face is solids and solids flowback," said Frank Corredor, Summit ESP Optimization and Monitoring Group manager. "Last year we introduced a new tool called the SandRight Solids Fallback Preventer. This Summit ESP engineers continuously monitor wells on a 24/7 basis from a state-of-the-art monitoring center. The engineers have access to a complete 360° view of every well's operational information, downhole equipment, application design and field service history. (Photo courtesy of Halliburton) ARTIFICIAL LIFT: OVERVIEW Baker Hughes, a GE company's FLEXPump series electrical submersible pumps can handle flow rates ranging from 50 bbl/d to 10,500 bbl/d, ideal for unconventional plays in which production declines rapidly. (Image courtesy of Baker Hughes, a GE company)

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