Artificial Lift Techbook 2018

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36 | July 2018 | ARTIFICIAL LIFT: TECHNOLOGY SHOWCASE Tool deters fallback debris from entering ESPs In May Halliburton introduced the SandRight solids fallback preventer, a technology to mitigate prob- lems from fallback debris entering electric submers- ible pumps (ESPs) during artificial lift operations. SandRight addresses an issue that occurs during power shutdown events, where solids hovering in production tubing above an ESP can fall into the pump, causing major problems as they become lodged in the pump's stages. Attempts to restart the pump can overstress motors, accelerate wear on the pump, overheat cables or even result in catastrophic failure. SandRight maintains the ability to execute thru-tubing chemical treatments and is protected from jamming, erosion and paraffin/scale buildup. The tool protects ESPs from permanent damage, while significantly increasing an ESP's run time in unconventional applications. For unconventional assets, the SandRight tool is estimated to save an annual $250,000 to $800,000 per well in operational efficiency and lost production. Optimizing artificial lift with multiphase pumps As wells mature, the inflow from surrounding for- mations will lead to lower level in the production tubing limiting uptime of traditional pumpjacks. The lower tubing level will add more solution gas. The annulus or casing gas is traditionally bled off and comingled with the liquid stream of the pump- jack. Operated in pump-off control mode, the low tubing level will stop the pumpjack, the gas flow stalls and the well shuts in. The multiphase pump, which is designed for the gas saturated with liquid is offering an alternative to traditional casing gas compressors. The compressor cannot accept any liq- uids and relies on a combination of scrubbers and blow case for protection. It often leads to cycling and shutdowns from too much liquid. In the Leis- tritz multiphase annulus gas unit (MAGU) system, both the annulus gas and liquid streams are routed through the unit. The lower annulus gas pressure will raise the tubing level, allowing the pumpjack to operate safely as result of better well inflow. With the MAGU combined with pump-off control, the result is improved uptime and less rod wear leading to better economics. New artificial lift ESPs Novomet has introduced a new ImpalaESP prod- uct line with an extended operating range. The ImpalaESP compensates for axial force and main- tains the impeller in the float state. This achieves low axial force values in a wide range of flow rates for a wider operational range. Working in horizontal wells, Novomet's gas preven- tion intake eliminates the problem of undissolved gas. The intake design contains a rotating cylinder, which sets the input port down. This allows the gas to rise The SandRight deters damaging solids from entering the ESP during power shutdown events. (Image courtesy of Halliburton) MAGUs are typically mounted on a drag skid and can be moved easily from one well to another or left in place to support one well. (Image courtesy of Leistritz) ColibriESP allows the well to be completed without the rig crew. (Photo courtesy of Novomet)

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